Electric Scooter Prerotator?

[danmcallister]

Bob, I am interested in a soft start system for a automotive starter, I want to use it for reverse on my three wheel motorcycle.
Thanks Dan
[email protected]

 

[M. Pearce]

Hello,
How about just buying an electric 12V trolling motor. The controller is already there for soft starts.

Mark

 

[rtfm]

You guys need to subscribe to Homebuilt Rotorcraft magazine!

Hi,
I've heard about this fabled publication, but so far its been a case of rocking-horse droppings. Any idea where I can find more info? Sounds like a publication I would really enjoy.

Regards,
Duncan

 

[CypherNinja]

I would also like some info on this awesome sounding mag.

 

[Alan Coats]

Homebuilt Rotorcraft
RFI Publishing Group
5555 Zuni S.E., Suite 281
Albuquerque, NM 87108

(505) 323-8455

 

[GyroRon]

What is up with the trolling motor idea, that sounds like a good idea!

 

[Al_Hammer]

Hello,
How about just buying an electric 12V trolling motor. The controller is already there for soft starts.

Mark

Yes, it sounds good, but if you run the numbers a trolling motor doesn't have enough power. I looked up some specs.
A Minn-Kota 12V model that draws 50 amps max will deliver about 0.6 hp, assuming 80% efficiency. The current falls off as the rpm rises, so the actual power is even less. The trolling motors have nowhere near enough power.
To get a decent prerotation speed you'd need 3 or 4 of these things at $459.00 each.

On the other hand, if you went to 48 volts you could get as much as 4.5 hp out of a larger type trolling motor from Ray Electric for a mere $3800.00
That's 4 car batteries (and a lot of lead) to lug into the air, plus the motor itself looks too large to hang on the top of the mast.

 

[gyroplanes]

Homebuilt Rotorcraft
RFI Publishing Group
5555 Zuni S.E., Suite 281
Albuquerque, NM 87108

(505) 323-8455

Homebuilt Rotorcraft Magazine moved to Texas some time ago. Don Parham left it in the capable hands of Forum inhibitant Bob Stark.

Homebuilt Rotorcraft
PO Box 428
Olney, Texas 76374

(940) 564-2938

 

[gyro]

you may want to check this out.

https://www.rotordyne.com/parts.htm

 

[Al_Hammer]

Jan/Ken Rehler's electric pre-rotator design looks good.
www.rvk-architects.com/Ken/Gyro/Jan.html

I think Ken sent out some drawings of it to a few people on the forum.

If you only want 100 rpm's or so, an electric motor is OK.

 

[Edwin Doetzel]

Sounds like a great idea, just remember that if you are doing a lot of flights in a short amount of time (taking people for rides, doing training) you are going to need more alternator and probably battery capacity. HP required shouldn't be too hard to figure out.

 

[Lepooner38]

Please email me as well!!!

[email protected]

Thanks

 

[Ga6riel]

Id like the plans too please Robert

 

[krew]

I would also like the plans [email protected]

 

[Brent_Brown]

Can't the plans be posted here?