GCinDC
100 MW
Nice! Video of how quiet it is? 
A picture's worth a thousand words....... (title edited)
- Thread starter recumpence
- Start date
AussieJester
1 TW
GCinDC said:Nice! Video of how quiet it is?
recumpence said:
[youtube]GQV0UzV5qTM[/youtube]
Best e-tadpole trike EVER IMO. Awesome job Matt... Is it still possible to do doughnuts and drift on bitumen like when you had the twin motors or has it been tamed enough to just grip and go now? Obviously will be alot more sane to ride, was like trying to ride a Nitro Harley on the road before haha...
ToP JoB Matt you roxz
KiM
GCinDC
100 MW
Thanks, AJ. Missed that...
Hillhater
100 TW
recumpence said:
do you know that from experience Matt ? ..
I have heard all sorts of explanation for the design of the rotor "spokes" ( much of it unsubstantiated) but from a strength point of view, they always seem to be reversed to me. I have not had any problems with reversed rotors, but then again i dont have a high powered trike ! :lol:
recumpence
1 GW
The issue, from what I have heard is, reversed direction puts a pulling force on the rotor rather than a pushing force. This tends to warp the rotor. Of course, this is pure conjecture, however. I have not tried it. I am game to try anything, however. 
Matt
Matt
adrian_sm
1 MW
Awesome work as usual Matt.
Is there any chance of repurposing a motorbike drive pulley. I was just driving behind a harley, and the drive pulley on that look a similar size.
I know offsets and all will probably be all wrong, and I only found prices on custom aftermarket ones with a quick google serach, but it bit might be worth a couple of phone calls.
Something like this.
Is there any chance of repurposing a motorbike drive pulley. I was just driving behind a harley, and the drive pulley on that look a similar size.
I know offsets and all will probably be all wrong, and I only found prices on custom aftermarket ones with a quick google serach, but it bit might be worth a couple of phone calls.
Something like this.
recumpence
1 GW
Looks good. I wonder what they weigh?
Matt
Matt
E-racer
1 kW
Arlo1 said:
till you take the lathe and mill to it...
gwhy!
100 kW
I have been thinking about this and would it not be possible to mold one out of plastic ? the sort of stuff that Thud is/was going to use for the hall mount on the outrunners or will it not stand upto it ?.
recumpence
1 GW
There are a few other options out there for the do-it-yourselfer.
When I was at Pheifer the other day, they showed me a 140 tooth 8mm pitch pulley they had in stock. This is a cast, then machined pulley for a large tire go-kart. However, it weighed a ton and would require a center hub to work. So, a $100+ pulley, plus a custom center hub, LOTS of machining to lighten it up and it would still not look cool, and would still be somewhat make-shift.
I am looking at other options as well.
Matt
When I was at Pheifer the other day, they showed me a 140 tooth 8mm pitch pulley they had in stock. This is a cast, then machined pulley for a large tire go-kart. However, it weighed a ton and would require a center hub to work. So, a $100+ pulley, plus a custom center hub, LOTS of machining to lighten it up and it would still not look cool, and would still be somewhat make-shift.
I am looking at other options as well.
Matt
E-racer
1 kW
Katou has started a thread about low cost options for large cogs here: http://endless-sphere.com/forums/viewtopic.php?f=28&t=26122 this shud keep us from mucking up Recupence thread.
MitchJi
10 MW
Hi Matt,
Polychain Belts:Matt said:---The pitch is 8mm.
---The tooth profile is Polychain, not the typical HTD.
---The belt style is Contitech Syncrochain Kevlar cord.
---Ratio is 3.07 to 1 (26 tooth front, 80 tooth rear).
My reasons for using these particular components is multifaceted;
First, even at 8mm pitch, 15mm width, a HTD belt would be near its limit with a 3220 motor. This belt and tooth profile is WILDLY over speced. This particular belt in a 40mm width is used as a jackshaft to track belt on 400hp supercharged snowmobiles! So, this application is child's-play for it.
- Why did you choose 26t for the drive sprocket (the recommended minimum for Polychain is 22t)?
How wide are the belts (would 10mm wide work)?
Seems perfect for connecting the motors with your dual drive setups (especially with your "14kw continuous" versions of Astro's configured as dual motors.
).
Sprague clutch:Matt said:
- How is the Sprague clutch working? If its reliable it seems like a better solution than a FW
How wide is it (wider than the belt or sprocket)?
Any reason it wouldn't work with bike sprockets (like the output from your drives for a build that can't use belts)?
recumpence
1 GW
Great questions Mitch!
The 26 tooth was the minimum possible with the 52mm sprague.
The sprague is 15mm wide.
The belt is 12mm wide. We will be testing it in 9mm width as well.
So far the sprague is fine. These are designed to run in very unforgiving environments (like gravel conveyors).
Yes, it would work fine with a sprocket. I may look into that as well for a future project. Right now, I have a redesign of some components going on that is taking up all my time and resources.
Matt
The 26 tooth was the minimum possible with the 52mm sprague.
The sprague is 15mm wide.
The belt is 12mm wide. We will be testing it in 9mm width as well.
So far the sprague is fine. These are designed to run in very unforgiving environments (like gravel conveyors).
Yes, it would work fine with a sprocket. I may look into that as well for a future project. Right now, I have a redesign of some components going on that is taking up all my time and resources.
Matt
John in CR
100 TW
recumpence said:
With this kind of one-way, does rpm matter or only the torque?
recumpence
1 GW
RPM matters. If it is run up at 3,000 rpm it gets very warm (I have one chucked up in my drill press spinning at 3,100 RPM for long durations to test). But that is 3,000 rpm of spinning (not when locked) for a number of minutes at a time.
Matt
Matt
Hillhater
100 TW
recumpence said:
Is this a true "Sprague" or is it a roller /ramp design ?
recumpence
1 GW
It is a sprague with two rows of locking pawls and a ball bearing in the center of those rows of pawls.
Matt
Matt
wojtek
100 kW
what is the difference in efficiency between belt and chain drives? [if any?]
recumpence
1 GW
There is an efficiency difference in high RPM setups, but not in low RPM setups like this (or not as much). There looks to be a slight improvement in efficiency, but we have not put enough miles on these belt drives yet to get precise numbers.
Matt
Matt
richmpdx
100 W
I'm late to this discussion but allow to also add my appreciation of how great the drive looks and performs. What would be the possibility of adapting this drive system to use with a Sturmey Archer 3 spd internal/9 spd cassette hub described in this thread?
http://endless-sphere.com/forums/viewtopic.php?f=31&t=24449
Particularly for a dual right hand drive?
Rich
http://endless-sphere.com/forums/viewtopic.php?f=31&t=24449
Particularly for a dual right hand drive?
Rich
I have been running a belt drive / belt drive for the last year or so with 800 watt brushed motor, before it was a ice set up, using belt drive/ belt drive.
I need to post pictures of my bike with the single reduction 14 tooth to 110 tooth rear sprocket.
I posted earlier about using matt's setup on my bike to get me up to 60 mph
I have been using pheifer industries for the last 7 years, the owner will answer any pulley / ratio needs etc.
thanks
Mike
orlando
gates 8mm poly gt 12mm drive belt / gates carbon gt 8mm 12 mm crank pedal belt
I need to post pictures of my bike with the single reduction 14 tooth to 110 tooth rear sprocket.
I posted earlier about using matt's setup on my bike to get me up to 60 mph
I have been using pheifer industries for the last 7 years, the owner will answer any pulley / ratio needs etc.
thanks
Mike
orlando
gates 8mm poly gt 12mm drive belt / gates carbon gt 8mm 12 mm crank pedal belt
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