Some custom work going on in the "Matt-Cave" :~)

More info;

I was late for dinner when I posted. So, I wanted to add a bit more now that I am full of pizza. :mrgreen:

A couple things stand out with this trike versus the other trikes I have built. For one thing, the motor RPM is far higher (14k versus 9k). There is a definate high pitch whine at full throttle. However, with the chains in a case, that whine is not horrible. Also, the wind drowns it out. Second, I can actually smell my brakes after a hard stop. At first I thought it was an electrical smell, but now I realize it is the brakes. The rotors are blued from heat. Of course, so are the rotors on my other trikes. However, those were 160mm rotors and these are 203s. Also, the differential braking is very tractable and nice to use. It definately pitches into corners better with the individual brakes and I like the redundant nature of them considering the speed of this thing.

All in all, I am very happy. I thought it would be explosively powerful and indeed it is. However, it is not in the least frightening to drive. The chassis, brakes, rims, tires, and steering are all (so it would seem) very well ballanced lending to an extremely well planted and stable platform.

At this point, I want to add a kill switch for safety reasons, I need to pin the steering tiller pivots for strength, and clean up the wiring a touch. Oh, lastly, Castle Creations recommended adding caps. Now, I did tripple the capacitance already. However, I have been told to add caps right to the board rather than 2 inches away. So, to that end, I will be pulling the plastic caps off the side of my controllers and solder caps right to the boards.

I will get a video soon. Maybe not this weekend, but when I can. I am busy as a maniac filling motor and drive orders right now.

Matt
 
Great stuff Matt i think i speak for all ...VIDEO PLEEEEASE :D

KiM
 
I know, I know. Hmm, tomorrow at 7AM I am showing the trike to a bunch of guys. Maybe I can get a good smokey burnout on video then. :)

Oh, the 0 to 60 time is not the 3.5 seconds I was hoping for. It is about 4.5 seconds. The rest is tire smoke. I am at the limit (way over the limit) of bicycle tires at this point.

Matt
 
recumpence said:
I know, I know. Hmm, tomorrow at 7AM I am showing the trike to a bunch of guys. Maybe I can get a good smokey burnout on video then. :)

Oh, the 0 to 60 time is not the 3.5 seconds I was hoping for. It is about 4.5 seconds. The rest is tire smoke. I am at the limit (way over the limit) of bicycle tires at this point.

Matt
Click to expand...


Traction can be very tire pressure fussy. 9psi in my slicks, and I spin to the 1/8th mile. 7psi and I hook like the tire/road is a rack and pinion gear setup.

Mark the position of the tire relative to the rim so you can see if the bead is slipping on the rim. If it does slip, mount the tire with a little rubber cement that dissolves easily in solvent. Then when you need to change tires, a sponge with some solvent cleans the rim up like new.

**** Be aware, if it slips too much, you can tear the valve stem out of the tube **** Take baby steps in dropping pressure and keep an eye on watching the rim/tire mark while you're getting pressures adjusted.


I can't wait to see it rip!

-Luke
 
liveforphysics said:
**** Be aware, if it slips too much, you can tear the valve stem out of the tube ****
Click to expand...
I did that once on a regular bike going uphill, heavily loaded in lowest gear; I already had a slow leak (before I started using Slime) and once the pressure dropped enough, the rims didn't grab the bead anymore, and I spun the rims in the tire instead of continuing on up the hill. SNAP. :(
 
Thanks for the advice.

I like the cornering I get with more pressure. So, I am not too worried about dropping it so low my bead slips. Actually, I am seeing over 500 amps at 43 volts as it is. I do not think I need more power to the ground. :mrgreen:

Oh, and all this is with the pack resting at 45% state of charge. I have not even charged the pack up from the level the individual packs came from Hobby City. I just ballanced them together. There is more power to be had with a fresh charge. Oh, I am also heating up (about 10 degrees) the 8 guage motor wires under load. So, that needs to be tended to. I also need to (according to Castle and Methy) add some more caps at the boards before I blow a controller.

At any rate, it is weird having this much power on a chassis that can actually handle it. I am so used to overpowering everything that the handling gets sketchy at best. This thing is just rock solid. Assuming the controllers survive, I do think I hit a bulls-eye with this build.

Matt
 
So does Matt still wish to sell it to fund the next insane project or will he be
pushing to sell the recumbent and keeping the trike? Must break your heart seeing
them drive off with a new owner after all the time effort and dollars you put into them mate :-(

Look forward to the smoke -n- go show anywayz Matt...be careful :)

KiM
 
Oh, its definately for sale. This is not my ideal for the perfect trike. It is too powerful to be a pleasant cruiser. Don't get me wrong, I like power. But, I typically find myself enjoying cruising even more. But, hey, power sells and is a kick in the butt to drive! :mrgreen:

Matt
 
recumpence said:
Oh, its definately for sale. This is not my ideal for the perfect trike. It is too powerful to be a pleasant cruiser. Don't get me wrong, I like power. But, I typically find myself enjoying cruising even more. But, hey, power sells and is a kick in the butt to drive! :mrgreen:

Matt
Click to expand...
I too am waiting like a kid on Christmas Eve and looking forward to more pics of the finished product and the Go-Fast videos as well. If this isn't your idea of an "ideal" cruiser, what 'would' put and keep a grit eating grin :D on your face for mile after mile. Have you built/designed it yet, and if not....do you plan too?
 
Video!

http://www.youtube.com/watch?v=WKAMus3oSdw

If you listen to me talk at the end of the video, I give a temp number from my temp guage. That is not the motor temp, that is the rear tire temp. The ambient temperature was 45 degrees when this video was shot. So, bear that in mind when you hear the twmp of the rear tire after this run. Also, no, I am not wearing a helmet on for this video. We never intended to video it. I merely was at my Saturday morning men's group and they asked to see the trike since it was there at teh shop that we were meeting. So, I took it out and we got a quick video. Bear in mind, this is a closed parking lot behind our building. There is nothing to hit back there an not traffic.

Oh, before I ran the trike, I checked the battery state of charge. It showed 25% state of charge durring this run at a settled voltage of only 45 volts before I ran it. So, this video is a low power demonstration. :mrgreen:

Oh, lastly, when braking hard to turn around at the end of each run, the inside front tire would skid and actually smoked from the skidding! I love pushing things to the limit!

Anyway, enjoy the video!

Matt
 
For those who are waiting on twin 3220 setups that have been ordered, bear in mind, these things are freakin INSANE!'

Be prepared! :mrgreen:

Oh, man, I should have previewed my innitial post. I just read it. When I type fast, I cna't splel ot seave my lief. :D

Matt
 
recumpence said:
Oh, lastly, when braking hard to turn around at the end of each run, the inside front tire would skid and actually smoked from the skidding! I love pushing things to the limit!

Anyway, enjoy the video!

Matt
Click to expand...


:shock: :shock: :shock: Holy Schnikeeee! :twisted:
 
And that thing is not down at the race tomorrow because...? :lol:

Assuming you didn't kill yourself on it trying not to run over one of the other racers as you pass them again and again, I have a feeling you'd be a sure winner. :p

Just before you come into view each time, it sounds like a jet aircraft about to fly over.
 
i just sh*t myself!

people would wonder where the hell all these squiggly lines came from :shock: .

recumpence said:
Bear in mind, this is a closed parking lot behind our building. There is nothing to hit back there an not traffic.
Click to expand...
it doesnt matter Matt we arent your mummy or your wife lol, your a grown man you can smoke however you want to :p . its hardly life threatening unless you had a run away i guess.

recumpence said:
For those who are waiting on twin 3220 setups that have been ordered, bear in mind, these things are freakin INSANE!'
Be prepared! :mrgreen:
Click to expand...

uhuh uhuh......maybe i should strap all 4 of mine onto one bike :twisted: .

on a technical side note, I noticed as common on you other videos, you have 2 connections to the controllers? is this to limit the spark? or to get more current limit of connectors by running several parralell. What connectors (amps) do you use anyway as I mayaswell start ordering soon.

edit: oh do you have a picture too, may give me some ideas how to wire mine to save hassle.
Rodger
 
INSANE!!! That thing does sound like a jet fighter!! Is this accurate? Poor tire never had a chance! :twisted:

Thanks for the vid Matt, you rock!!
 
E,

Thanks, Man. Stroking my ego never hurts. :wink:

Rodg,

I use one Deans Ultra connector for the negative lead (using both spades for the negative only) per controller. The positive is permanently soldered.

I will try to get some good pics and a walk-around video at some point.

Bear in mind, your drives will be about 20hp peak. This is 28hp peak. However, even 20hp is way over the top for anything designed for pedalling. :mrgreen:

Matt
 
Awesome!! **2 video and engineering achievement! It's got good "lines" too! :D
 
Matt,

Awesome video!! What do you think the weight distribution is to the rear tire on accelleration, 50%?

Dave
 
HAHA who said RC esc have issues at start up, freakin awesome Matt, thats how e-bike videos
should be, get on bike roll 5 foot and do a doughnut...its obviously missing
something though buddy...traction hehehee BRILLIANT Matt i don't know how you could bring yourself to
sell it...

KiM
 
It looks like you have to much weight over the front wheels by the way it reacted when it hit the bumb towards the end of the video. Looked pretty twitch right there. Had an pedal powered trike that would do that over bumps - back wheel would actually bounce when it hit bumps. More rearward weight bias would also help it hook up more and limit the endo under hard braking. IMO that is the only issue with the trike, at the speeds you are capable of, you need to keep al three on the ground to stop ASAP.
 
coln72 said:
It looks like you have to much weight over the front wheels by the way it reacted when it hit the bumb towards the end of the video..
Click to expand...

I didn't see any bump ? The rear came off the ground when Matt dumped the front brakes he has HUGE mofo disks on the
front it wouldn't matter how much weight was on/over the back wheels its still going to pop the back up if he want's it too.


KiM
 
Looked a little twitchy on the run just before the last donnut. Looked like Matt ran through a slight hole in the tarmac and it got a little light in the rear. Nothing dangerous, but noticable to me from runing race trikes for 7 years. IMO, more weight in the rear would make it more stable and hook up better to put some more of the power down.
I know that under heavy braking its gonna lift the rear with those discs. We have had trikes that did that too before we fitted the bodywork. Hell, we have even ripped a caliper right off its mount :shock: Totally screwed the disc that one.
 
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