Daniel Eareckson's Division III

Here is where I will be writing about my Division III project: Electric Bike! need a good title.

It's not a bad idea for everyone to have something like this for major projects so they can go back when writing their final and see the trials, troubles, and tibulations you went through to make it sound so much better!

What my Division III is
Converting a gas italian style moped (not a vespa!!) into a relyable and reasonable elective vehicle.

Things to do
Email Steve.

Call Harrisonburg place

Call other local repair shops

Order motor

call mcmaster

Call battery folks

email jamie

turn on motor - - - issues

scan things

call kevin when testing

Wednesday March 3
Ok, well that didnt last long, but I have made progress in my absence. I now have chain for my bike, finally. I'm fairly sure it fits... I have broken some of my hold against physically starting. I've found that after a few months of planning, its hard to get into the physical manifestation of the project because I know its not going to look like whats in my head. Ah well. Last night I was exploring ways of afixing the motor to the frame, when Murphy one happened. When I tightened one of the screws holding the motor together, the piece that holds the baring in place snapped. I now have a drawing of it in case the superglue doesn't hold and I need to make one out of metal. Also I am getting a little annoyed, every time I go look at my bike to take measurements or anything, its uncovered and rained on again. So I put the tarp back over, weight it down, and its uncovered next time i go out there again. Irritating. Anyway, I am indeed a little behind in my project, but I know its a recoverable distance. Therefore, here's the plan for the week:

Motor attachable to the bike Battery storage on the bike Diagram of where the wires go on bike Edit write up Do more sections of write up Order motor controller

Wednesday February 24
Awesome two days in a row. I got my inner tubes in the mail today. So once I get the motor all hooked up the wheel's wont die. I also got an application to the dart grant, which I'm working on. I do believe that electric vehicles look terrible in general and want my bike to look good so that people can respect it for more than its mpg of really high. That's why I think it fits in the dart philosophy. Anyway, it'd help me feel better about not having people pay for the whole thing. On the paying note, I'm giving myself till Thursday to find out about the invicare controller or else I'll just buy the one I found. http://www.criticalvelocity.com/item.php?itemid=bidir07 looks ok... but expensive. I also am having trouble finding one with a higher continuous amperage rating. I'll ask Steve on Thursday. I did not go to tractor supply today because the weather is nasty. it snowed all yesterday and then started raining this morning so there is that 4 or so inches of water with frozen sodden snow mixed in on the ground. In other news I went to fencing yesterday, which actually made me feel much more like a human and less like a blob, so I think that will continue to assist me in feeling up to completing this project.

Tuesday February 23
hooooo boy. yeah its been a while. not exactly for lack of work, but lack of satisfactory work i suppose. but, its getting tight time-wise. So I am going to make an effort to update this more so that I can keep track better, again, of the time and force myself to show some improvement every day. so the timeline needs updating again. I did not order the spline collar because mcmaster doesn't have it. I need to find another place that would, or do some crash courses in milling. that'd be cool, but id rather order it. Speaking of ordering, I finally found a controller I think might work. But I also found one on one of the old wheelchairs in the back of the shop, that I'm going to call the company and see if it'd work. Glenn made it seem like he doesn't want it, anyway, true or not.

got to lemelson finally. I believe the chain size I need is '415' and looking on some sites apparently size '41' industrial chain is exactly the same size. I am planning on running over to tractor supply tomorrow to get some and see if it does indeed work. I'm excited.

Sunday February 7
I had a very nice meeting with the committee on Friday, and I should write down things they said here.

I've been doing research on motor controllers. That research and the meeting bot told me I NEEDED to find the amps drawn by my motor. This information is important because it will determine things such as, what wire do I need so I don't light a fire on my bike, how long will my batteries last at full throttle, and what motor controller should I buy. To find this I found a fantastic test http://www.rcgroups.com/forums/showthread.php?t=393591, if I wanted to measure it. I think this was for small dc motors such as you would find on an RC plane, but its awesome nonetheless, and the theory could be adapted for my needs. I also remembered that there is some correlation between the 'horse power' of dc motors and their watt rating, which can be then converted into amps with a bit of unit elimination. 'Horse power' is in quotes because for dc motors this does not mean exactly the same as cars, or something and its a bit fuzzy, however its worth a shot. so if my motor is 4.8 'hp', that means it is about 3,580 watts. This is much more than the 2kW I was looking for, yay it can go faster. To get to amps, you divide by the voltage of the system. So if I run my system at 12 volts like I want, the amps are at, about 300. This means that to ride for an hour at full speed (hopefully would never have to and the controller causing it to go slower should reduce the amps drawn I think) with the 20 amp hour 12 V batteries I have, I would need 15 of them. Ha ... Ha. Running the system at 24 V would mean it would pull 150 amps per hour, which would mean I would really need the same number of batteries as they are 12v. So in reality, the battery charge time is entirely dependent on the motor you buy, not the voltage you choose to run the system on. Important. Also, if the Amps are that high, for 300ish I need gauge 0 or 1 wire. I think that's for solid copper wire, it'd be different for stranded, and I think stranded for something that thick would be better, more flexible. I'll look for stranded wire gauge thicknesses later. Ah well. On the to do before next meeting: Work on tutorial thingy.

Friday February 5
I finally found a wiring diagram! I'm going to go test it and be very happy! Ok so it spins. Thats a load off my mind! Sadly its now Friday and the shop is going to close for the weekend later today. However, the weekend should give me time to do some of those 'administrivia(l)' details that I have been neglecting while looking for how to make the motor go. I need to find the appropriate motor controller, I need to find some possible tire tubes, learn how to fix the breaks if they need it, I dont think they do- but it's important to know how for the future. I also need to continue work on the first parts of the 'how too' section of my project. I have gone just beyond the planning stages now so I should write all that up in a simplified manner while it's all still fresh. I have been learning about motor control, and it looks fairly straightforward, though I am a little confused on some of the diagrams I saw how the throttle functions are controlled. But I'll find one and more information and be awesome at figuring these things out. I should take more pictures, and put a tarp over my stuff.

Wednesday February 3
On an interesting note, the bolts that hold the arms of the break levers on are threaded to 1/4 28. For future reference. Also, I was talking to Kevin and he suggested that I call the marina down the road for used batteries, since marine batteries are 12v and generally good. I like it. It's a good idea.

Did some research this morning about a 'three post motor' and found absolutely nothing. found some cool things called bearing motors but thats about it.

Need to go to institutional advancement to ask about grad gift program since Lemelson isn't on it this year. Neither is the farm. They may get no money from me.

Going to go measure and work with the gear ratio's I have till I can get some answers out of people about my motor. Maybe work on random projects so that I can get it into my head that this is a happy place again :P

Tuesday February 2
So a lot has once again happened over this last week. First things first, my motor came! I'm excited. I am going to go and plug the batteries in to it to see what happens later today. That should be exciting, maybe I'll bring the video camera. There are lots of bolts on it so I need to figure out which are the terminals and which are the 'ground' or just places to attach too. The shaft, where the sprocket goes is going to be straight trouble though. It's a spline shaft, which means that it has a bunch of flattened groves in its sides. I can't find any external collar to fit it, but I'm going to take all the measurements that I need and call McMaster Carr tomorrow. Hopefully they will just have the part and i can order like 3 just in case i mess one up.

Battery update: the central battery store hasnt had any more 20AH batteries come in, but I'll keep checking back. I think the On-Bike battery pack will simply consist of the two batteries I have now. It wont go far but it'll allow me to experiment and work everything out.

On advanced learning activities: I should meet with Donna and Colin to specify what I will be doing to make the class into a higher level. Steve said that he's fine with this idea, but he needs to know exactly whats 'for class' and 'for independent' so that I don't weasel between the two and say that my good work was for whoever was asking at that moment. Cleaver, unfortunately I hadn't even thought that far in advance. But we had a field trip on Friday, myself Donna and two students from class.

I was a bit saddened that there was more of a mentality of 'we're a small company becoming an large company' meaning that they were mostly buying the parts they use and just doing installations into vans. But this makes sense in that there are so many regulations each piece has to meet, that its just not economically or legally feasible to do all the work and testing themselves.

This means that they did not give me any awesome inspiration for my drive system. Other than If I were doing a car I would get rid of the steering wheel and do Something else. Why are all the car companies So stuck on the steering wheel? I guess I hope for innovation to preserve the interest of the world.

On that note, I talked to Steve after class, and the short version is that I can indeed build a motor controller. However, its the time vs money thing. I really should just buy one, it faster and simpler and will work. So I'm learning about them, and looking for one to buy. self deadline, ordered by Friday, when hopefully i have a meeting? I should check this. And confirm with people if its on the schedule.

later on tuesday: I'm in the shop. I took out my motor and batteries. I grabbed a volt meter. The batteries are fully charges at 12.9 and 13 Volts respectively. I find the bolts that I should attach the wires too and test to see if they're connected, they are good. I clamp motor in table vice, find some heavy wire, and hook up one battery. I pause before tapping the wire on the battery terminal. nothing. I tap it again, holding it longer, blue sparks at the battery, and a wire shaped indent melted into the terminal. I glance at the motor, I Think it did something, but I doubt it. Helpful advice from neighboring visiting alums, and I hook batteries up in series. attempt again, on quarter of a terminal instantly melts, no spinning on the motor shaft. Research confirms that it is indeed listed as a 24 volt DC motor on several sites. It is called a '3 terminal' motor, will find out what that means. Attempting to contact Steve. May have ruined at least one battery. Pissed.

Monday January 25
Well, I ordered my motor! It should be comming in late this week or early next week. I figured out atleast one of my learning goals as well, though I did this a while ago i apparently forgot to put it here. I am taking a class with Steve next semester (starting Wednesday or Thursday) about assistive electronics. I plan on doing out-of-class work in an independent study format on the topic of accessible vehicles and how they function. Hopefuly Donna and I will go on a field trip friday to a place where they make such things. Plan on seeing a lot about that in the future here. Taking this class is good because I will now have a legitamate reason to bother Steve on a face to face weekly basis. I feel this will help my upcoming deadline about the drive system.

Over the next few days, I need to finish drawing up my on-bike battery storage, set up the field trip, contact the bike shop about tubes, bring a tarp over to my bike as its pouring outside, keep checking my mail for my motor, and really get cracking on the initial parts of the how to guide.

Thursday January 21
In looking at the bike with Colin, he noticed that it has breaks, yahoo! this is a good thing. I noticed that the tubes didnt hold air from the last time I pumped them up, so thats not good. The company is Schwalbe, who apparently has a dealer in amherst, laughing dog, so maybe I'll take a fieldtrip at somepoint and as them about new innertubes. I finaly got a few pictures up on the picture page, and also the sketch that has all the numbers and measurements on it. I noticed I may have a meeting today, I'm not so certain, but if so great! I can ask about the motor.

For battery storage, I do intend to do a trailer for a larger pack / longer trips. a quick estimate for battery storage on the bike itself, I can easily store atleast 2 batteries without harly any alteration below the seat above where the motor used to be. That would be 20 amp hours, so maybe about 10 min of driving time. I can definatly fit more batteries on the bike itself, with a holding compartment slung in that same area.

Wednesday January 20
Over the last week, I have been taking too long in wring these updates, and the site logs me out, I get grumpy, and don't try again for a few days. I will get this one up, and it will start me writing all the things I needed to a week ago. This is going to come in short little sections so that I make certain that it will get saved.

Last week I made many more inquiries about buying a motor. I hit my head against a wall somemore with websites, and then finaly got up the courage to call local companies. These calls did not help my confidance much. The first three phone calls went something along the lines of 'no we dont deal with electric vehicles' 'you wont find what you're looking for' 'no idea good bye'. This went on till thursday when I had a meeting with my advisors. On my way to the meeting I found one helpful company who pointed me to another company that may have what I'm looking for, which I then immediatly forgot the name too.

The meeting was good for many reasons. I told them about the issues I was having finding a motor, and the suggestions that they had were great. I had wanted to keep it to a 12V motor so that I could have a longer battery life. The suggestion that 24V motors were probably cheeper was important, however I did want to be able to go further if I needed too. Then there was the idea of having a small battery pack on the bike itself, and then having a detachable trailer for longer trips which would allow for more storage of cargo, as well as having a place for more batteries for longer trips. I liked this idea so I took a quick look at 24V motors, and I think I found the perfect one for me. It's supposed to be a 4.8hp motor, and is only $160 with shipping. So I have hope.

Another good thing is that I finaly got out back and drew the frame and measured everything I thought was important. I will soon scan that and put it up here.

Sunday January 10
So didn't manage to call any of the other shops, was hoping that the shop that said they might call me back would. Alas, no luck. More nothing turned up on the web. So, monday, will call more shops around here as well as in Va just in case. Worst comes to worst I'll just buy the boat motor I found, and see what happens. But that would only happen in a week or two, I feel like stalling and waiting for exactly what I want. There are things I can do without a motor.

Talked to Dad, he said that he'll keep checking in at the battery store. Can do the project with what I have, but its always useful to be able to go longer and further. Building the battery holding place is one of those projects that I can start without a motor. Luckily, I dont think this will take very long. I think I'll keep the numbers of batteries even, just in case I need to parallel half and serise half to bump it to a 24 volt system. This would cut my battery life in half tho, so I'm really hoping for a 12 volt motor to materialize.

The big news for me is that I took everything off the frame. The motor, the gas tank, the seat, everything but the wheels. It was interesting to drain the tank. I called the office of the environment at physplant and she brought over a hazardous waste gas tank for me to use. It's nice when people are ableto help. The wheels themselves are gonna be an issue, if I use this one. They dont hold air. So I need to look to see if i can find new tubes for them. While dissasembling, it doesnt look like the thing ever had breaks either. Which is exciting. I really have no idea how it worked when it was functioning.

My meeting on thursday was pushed back to next week some time. Friday is arisia, so we'll see how that works out for everyone.

I have yet to talk to anyone about motor controlers. I should email Steve tomorrow as well. Alright, its time to start that todo section.

In other news, I 'm finding it difficult to keep up with this. I've always had trouble with journals, even when they'll help me in the future. But I aim to keep at it, so you'll see more. I did take pictures, and I added a page to put them up on, now I just have to figure out how to do that. There are a few things I should learn to do on this site, like use the # sign to link to different places on this page, etc.

Thursday January 7
Lots has been happening this week. Of course, its the start of the new year/january etc. Meeting got moved to tomorrow, dont know what time. So I have a little more time to do stuff. Yay. There was a free electronics deal online today, but the servers crashed because they were giving away free stuff. So I'll find the sensors I might need elsewhere. Tuesday I started designing the dash board area of my ride. I am still uncertain as to the final style. If I need a oopic or arduino or somthing, then it'll look very very different than if I am able to do all of my sensing and motor control mechanicaly / circit bendy. Mainly I wouldnt have an LCD screed. I do want atleast a speedometer, because I would like to know how fast I'm going. Also, then if I ever take it on a road, I'll be able to 'go the right speed' assuming i can get anywhere close.

I spent several more hours pouring over website to find a motor. I cound one that might work, but its almost 500. this seems to be the standard online price for a new motor anywhere near what I want. The issue with this motor is that it is for a 24V system. I can do this, but I would need even more batteries than I was planning. For simplicities sake, I would like to keep my bike at 12 volts. I think that a motor being powered by less than full voltage wimply goes slower with less torque, I would need to find out more on this. Exact details, I know it goes slower and is easier to stop, but I dont know by how much.

Alternately, I have decided that, like the batteries, I'll probably get a better deal by a company. So I have been looking up companies that do electric motor repairs in hopes they have exactly what I want lying around in their basement somewhere. I have called three places so far. The first one said they didnt do anything like what I needed 'we dont go near them electric vehicles thing', the second said that I would never find a motor I needed. The third place was more helpful, sorta. I said that I was making a moped into a electric vehicle, and I was looking for a 12v DC motor with a power of 1.5or higher watts, or 2-10 HP. He asked for more detail, so I said I would like to keep it under 75 pounds, figuing that gave me a good range. Apparently that's not enough information to find a motor, but he said he'd look around and make some calls and call me back. 48 hours later, no call, so it's time to make some more of my own. As I'm planning on drivin ghalfway home to meet mom and pick up the pretty frame- I think I'll call the place that Jamie told me about, and others arround Charlottesville and the area. This will give me more shops that I will sortof have access too. There are still a few on my list to call up here, we'll give them a shot this afternoon or tomorrow.

Mom also assures me that I should just do my project and make it the best project I have ever done. thank mom :)

I read some about lead acid batteries and their care and charging. Not really much to report, but I understand them much better now. Also, I'm excited to use my battery charger soon.

Monday January 4
Good things happened over break. Probably not enough good things, but good things for this project. I spent a good solid 4 days pouring over websites trying to find a motor. This was made harder by the lack of internet- but thanks to Barns and Noble, the occasional day was spent in search. It's a bit disheartening to try that long to find one part, and not find it. But I'm getting there... I have a few more ideas.

I like the winch idea... and they're not breaking the bank expensive. There seems to be a jump in prices between the 1.5 HP and the 2-5 HP winches sadly; from about $150 to around $500, which is sad. There is a small money rant to be had, but i'll do that after updates. I need to find someone who can tell me if a winch motor will actualy be up for running continuously. From a conversation with Jamie Bourland, a friend who I hope will be able to be a resource, I know that car starter motors are hugely powerful, but can only run for a short time or else they litteraly burn up. So, I need to make sure a winch wouldnt.

Jamie is the head of the science department at Blue Ridge. I've known him for a long time, and learned much in his drama / car shop. He knows a lot, and can make up more. Also, he has a very simmilar frame to the two I have, except that its stripped and painted and in really beautiful shape, he also wants it out of his shop. I may be making a weekend trip to c-ville to get more batteries and a prettier frame.

In charlottesville there is a store called the 'central battery' or something. The exact name I should look up. However, they sell batteries, and know batteries, and are very helpful. So after all that research on batteries, I just walked in and they were able to hand me the batteries i needed without my knowing hardly anything. However, the research I did showed me that they actualy were telling me the right stuff, and the batteries they sold me are great! and much cheeper than the otherones. They had two 20 AH 12 V batteries. They were about $20 each. I'm having dad check back in with them incase they have more soon. But I got them, and a charging station, so I have a start and can work on the housings and see that my circuts work, even without having all the batteries I'll have possibly in the end.

Talked to dad too, about the money thing. He said that he will help me, and that I should worry about getting this done right, as opposed to doing as cheeply and crapily as possible. I feel bad, but they did say they'd pay for my school stuff, so, I will rely on them. I'm glad, because I was worried that I wouldnt be able to do this project to its full potential. Now, I can continue on and worry about grants later. I will need to do that too though, and I kept the recipt from the battery store just in case. So, I have batteries and know where to get more, my budget expanded, and I'm getting there. Thats all for now, we'll see. 15 more weeks.

Friday December 15
And there we go, missing almost an entire week's worth of updates. To be fair, this was the last week on campus and that means cleaning the mod, packing, trying to set up travel plans, etc. I did not get into the shop as I had hoped and planned, mostly because I've been waking up at noon and getting sniffly. But I think thats probably just the end of the semester flop. On an interesting note, I got an email and a phone call from the lady that Three Hammers Forge sold some penannulars to, she wanted more before christmas, but then decided she didnt after a few days of me freaking out because I hadnt been able to get into the shop. This reminds me that I do have to talk to Glenn about key access list. For now I'm on there as a second. So I get to wait around for people to call me only on days I cant go in to work late.

I have decided that for my DIII that I'm going to keep it simple. One motor, one wheel. Still having a little trouble finding the right motor, but I think I'm close. There is a winch motor that I think will work- maybe. they are strong, and geared to spin at a less than 1000 rpm, which is nice. I dont really think I can go hundreds of miles an hour. It's hard to find the right ones tho.

Monday December 14
Well, two days, two updates, even if number two doesnt turn out to be very insightful. No comments yet on my duedates from advisors, understandable since one doesn't work mondays and the others out of town. One problem that I have had in my mind is how to control the speed of my bike once it gets going. I know the circut design is not due till February 5th, but just to get it out of my mind I did some quick research. People keep talking about a 'controler' for motors. Thats simply a box that controls the electricity going into a motor. Brilliant eh? However, one thing that I did read which was helpful was that some controlers modify the about of current, and some focus more directly on measuring the torque instead. The wording reminded me of Engineering 101 at Smith. This was a good thing. For a while now I have thought that I knew how to adjust my motors speed, but I could not figure out how. I kept going back to Creative Electronics, and thinking about the relay circit I used for my table. I was having trouble because I did not think that it was exactly the right type, because what happened in that circut was that when I allowed a small voltage to go through the relay, it allowed a larger voltage to go through the other line, in effect. In reality it had something to do with electromagnetic switches if I recall correctly. This would be great, but its only an 'on / off' switch. However, at smith, we also played with chip boards and the lesson was to light up a LED. This doesnt seem either difficult or related as you find your voltage, put a resistor in if you have to, and say 'on'. However, the task was really to turn the led on, and then cycle its brightness down by steps of 10% all the way to 0, or off. As I had already played with arduino's in animal robotics the semester before, I was already a step ahead and so added a more steady decrease as opposed to a step method. The idea was that the human eye refreshes at a certain rate, and so if you turn the led on and off at that or a higher speed, it would look like it was constantly on. if you slowly brought the 0 or off period to longer durations, still fractions of a second, than we would percieve that it was simply duller than full 'on'. Electric motors, since when they are turner 'on' have, if I recall correctly a instant max tourque. because of this if you use the same theory, and simply turn the power on and off at proper intervals they motor seems to be running slower than full on. For a motor this required i believe a 'mosfet' or something to act as a switch so that the arduino did not take the full brunt of the motors powersupply and burn out, or something. I will imagine that it is possible to create a switch that would go back to a arduino to tell it how fast to turn the motor on and off. I will have to check with people on this, but this allows me to relax a little and focus on the beginning not that I atleast can fool myself into thinking I can get it to run at less than full speed without having to put some horrible mess of resistors and things that will drain the battery without propelling the bike forward. Turning on and off the motor would have the added benifit that it would be that fraction less of battery useage per second.

Another issue I have mentaly been running into is cost. College kids, well me anyway, dont have a lot of money. Batteries are very expensive, the best deal I can reasonably find is $2.50 per Amp Hour, which is alot when I realize I'm going to need a lot of AH's if I am going to actualy be able to drive this horrid thing anywhere. Also motors are expensive. $50 for a motor thats too small for what I want, and about $150 to $9 bazillion for one that would be from 'ok' to 'sweetness'. One horrible idea I came up with comes very simply from the materials I have, one broken moped and one back half of a broken moped. I could, if i desired, attempt for a trike. This would reduce the feeling that I'm simply doing a poor job of copying the diesel / vegie oil bike being made by Nick Unger. It's beautiful, new parts, diesal, probably will be street legal, and go much faster. Why yes I may feel out classed and jealous but you know, that happenes sometimes. I can plug mine in and go, eventualy, for short distances. ANyway. The Horrible Idea I had was that since I had two back wheels, if I did not want a trike, I might take the chain attachments off the second wheel (dont know if they are sprokets or gears or cogs or what not, should find out) and have two smaller motors drive the single or dual back wheel. Nick was afraid that the motors would pull on eachother and cause more inefficiancy and sidways torque on the axle (I think). This makes sense, but it's still curious in my mind. Though calculations as to if it would use more AH's than a single bigger motor (mostlikely) might be another determining factor. That would take a few minutes to calculate, so lets see. Well "if my calculations are correct" .. and I hope they are kinda.. using two 0.9Hp motors would result in using 30 amps per hour at about 360w. The motor that is 1.2Hp runs at about 1Kw, so uses 83.33...amps per hour. So, naturaly on a purely easy level, even with two motors, they would use the batteries less. However these numbers dont make sense. So I did somethign wrong. 0.9 Hp is not 180w. so, once again I need to check with someone. Maybe I should create a 'things to do' section..

Sunday December 13
Today starts the begining of a new chapter in my div III. It's actualy going to be recorded from now on so that both my advisors know honestly how I'm doing, and also that i'll actually notice when I dont work on it and feel bad. today I wrote up a list of every meeting I have planned with my committee, and what I will need to get done by each of those dates. I feel this should help, since my other few timelines I broke and since I hadnt given them to anyone, they didnt catch me. Hopefully I will update my timeline as I go as well. For Friday's meeting I also have to com up with a vauge outline of what I will write up. I am hoping to record the troubles I have and put them into either a 'how too' pamphlet, or some such instructable. I shall work on that part more tomorrow, as it is late. expect updates on that and hope dreams and bike fantasys tomorrow!

TIMELINE
February 19

two drawings motor controller ordered tire tubes ordered chain ordered tubes ordered spline for sprocket ordered initial battery storage on bike first draft of write up till current stage

March 5 motor controller, throttle, batteries wired and tested off bike points to afix all parts worked into bike frame

March 13 Motor aligned and attached to bike

March 26 'Working' bike - beautification starts completed rough draft of write up

April 16 Turn in Division III

Reference
Amps X Volts = Watts

1 Hourspower ~ 745 Watts

Motor shaft size is a 21/32 inch diameter 20 spline

chain for sprockets is 3/16 barrel and 1/2 inch pitch meaning a 415 sized chain.

Here are some pictures if youre so interested as to get this far.