what motor and why?

[jawnn]

I am looking for a motor that will push my 500lb trike up the the worst hill in town , about 16% for 50 ft before it starts leveling out, ...at about 5mph.

The rpm's that I need at 5mph is 100ish? (with the 20" drive wheel.) but I also need it to do about 300 rpms on level ground, for a speed around 15 to 20mph max.

I will try to calculate this more difinitivly over the next couple days before I can get back here agian....

I know one person using this motor http://www.google.com/imgres?imgurl=http://www.eng.mu.edu/crovettj/ses/lib/motors/brigs/Etek_motor_pic.jpg&imgrefurl=http://www.eng.mu.edu/crovettj/ses/lib/motors/brigs/&h=284&w=300&sz=16&tbnid=l3JU71t1nC8FxM:&tbnh=110&tbnw=116&prev=/images%3Fq%3Detek%2Bmotors&hl=en&usg=__pWo82UipuLiUgjdHRA3sQoj3rII=&sa=X&ei=YjcNTImSJpW4NfrgoLYE&ved=0CDQQ9QEwBg
but the chart says its just too fast...

I need a one that runs at about 1800 rpm but that has enough torque at around 100rpm....IS THERE SUCH A MOTOR?

I can use a jack axle to reduce the rpms a bit but there is not much room. http://commutercycling.blogspot.com/2007/10/ez3-usx-trike-users-guide.html

I hope this is not too carazy for you guys.

 

[katou]

I'd go stokemonkey style, but use a higher power hubmotor. Check it out. If you can cycle up that hill, a stokemonkey style drive can do it too.

Search stokemonkey in the top right corner, seek ye and ye shall find.

Katou

 

[dogman dan]

Yeah, that's pretty steep for 500 pounds. Something driving through the chain like a stokemonkey setup would work best. Unless that much work is too much for the chains and gears.

For lighter weight bikes, I found my 9 continent 6x10 works pretty good that way, going slow 5-10 mph up pretty steep stuff. But I think 500 pounds up steep stuff would choke even the best direct drive hubmotors.

But a low enough winding 5300 series crystalyte might do it, with enough battery for it. $$$$$$$. I don't know if they make a 5308 or anything wound that slow.