rrTV-PHOTO   New HD TV
HOME   rrTV-PHOTO   GALLERIES   MY GALLERY   HELP-FAQ
myHOME PM pmRR MEMBERS 732 ONLINE 19 EVENTS SEARCH REGISTER  START HERE
 
1 page1419 viewsPOST REPLY
Thunder Power RC . Mikado Modellhubschrauber . GrandRC

.
.
e-Electric Conversions > JR Venture 30/50 Airwolf Conversion
 
 
bRIBEGuy
Heliman
Location: Calgary, Alberta, Canada

Hey everyone,

I'm starting this thread in hopes of gathering some information and opinions on an upcoming project me and a friend of mine are working on.

He has an unused JR Venture 30 lying around, and we want to try and turn it into an electric Airwolf.

So far, this much is known:

-Main Heli: JR Venture 30 (may be stretched to a 50 size)
-Fuselage: Funkey Airwolf (30 or 50 size)
-Battery: 6S

The heli is not going to be a lightweight. We're estimating an all up weight of 8-12lbs.

The part that has us stalled right now, is the motor choice.

Origionally we had thought about using an E-Flite 60 outrunner, but the 6mm shaft doesn't work for our plans (since most "Mode" pinions are 5mm, and we don't want to have to make an adaptor).

As such, the few motors we are currently considering are:

-Century 600 Outrunner
-Neu 1910-1.5Y
-Neu 1912-1Y
-Plettenburg Orbit 25-10

We're aiming at a 1700-1900rpm headspeed, and any motor in a 700-1000 rpm/v rating should work. I figure most of the above choices should be putting out ~1000watts with a 6S pack.

Any idea if any of these motors would be a good choice?

We obviously don't need rotor-snapping 3-D power, but would still like the heli to have good snappy sporty performance.

Any input is very much appreciated.
09-28-2006 Over year old.
 
 
cgbole
Veteran
Location: tulsa ok

....
09-28-2006 Over year old.
 
 
bRIBEGuy
Heliman
Location: Calgary, Alberta, Canada

To be honest, the pinion size would be a combination of math & trial and error. A 700 rpm/v motor is going to require roughly a 13t pinion (on the stock 88t spur....which I'm assuming is Mode 1.0) to get a 1850rpm headspeed (assuming 85-90% efficiency, and a 10% drop in stated vs. actual performance).

Now that I have done a bit more research, I think we are leaning away from the E-Flite outrunner plan. There are a large assortment of 5mm pinions out there, and an even larger array of motors to fit them!

I know there are a bunch that will work, but we're looking at a pretty heavy bird with fairly poor cooling. I'd rather not watch my buddies electronics get cooked!
09-28-2006 Over year old.
 
 
bRIBEGuy
Heliman
Location: Calgary, Alberta, Canada

So does anyone have some suggestions for motors here?

Best brushless set-up for a 6S pack in a 10lb heli.

Thoughts?
09-29-2006 Over year old.
 
 
Doug C
Senior Heliman
Location: Northern CA

I just finished a Century Hawk Pro over to electric, used Neu 1907/1.5 w/fan, Phoenix 60 ESC, and Flightpower 6S2P 5000mah LiPO. with 20T Pinion, Headspead is 1710 rpm, no load, and with a 26T it is 2250 rpm also no load.

gives around 20 minutes of hover/cruise filght time, motor and batteries are barely warm to touch.

Helo lost a pound or so with the loss of the OS32, Muffler, and Fuel Tank.
09-29-2006 Over year old.
 
 
bRIBEGuy
Heliman
Location: Calgary, Alberta, Canada

Thanx for the Info Doug C. It's nice to know someone has had some success with 6S packs.

I think right now we're looking at the Neu 1912/1.5Y motor and a Castle Creations HV-85ESC. We're toying with the idea of wiring up a few smaller packs into a 4200mah 8S pack, as it would be about the same cost as just buying a big 6S pack.

8S on that motor would be able to put out a safe 1300watts of power without straining the motor at all, and a peak of an un-godly 3000 watts before the motor, esc, and battery go up in smoke!

This would be with a calculated 1850rpm headspeed. Best I can figure, runtimes should be nothing spectacular, but power should be more than sufficient for a 10lb heli.


It's hard to imagine so much power coming from a 2" x 2" motor!
10-01-2006 Over year old.
 
 
Doug C
Senior Heliman
Location: Northern CA

BribeGuy,

fyi, on my Hawk , after the conversion it is 10 lbs flying weight
10-01-2006 Over year old.
 
 
Andrewg
Heliman
Location: Lemon Tree Passage Australia

Power doiesnt come from a motor it is produced in the cells, which are both fuel tank and combustion chamber. The motor is more like the piston conrod and crank a means of converting energy into motoin

On your original Q? the cell count (unless you have to conform to a rule) is best set as high as you can get it. This allows you to get your motor rpm down and reduce your current at hover. This means a more efficient motor and longer runtimes

Even a 6.6lb sized 6S heli hovers at 33+ amps thats a lot of runtime up the pipe for no big effect. 8 S will improve things - good to see you not wasting huge power in high head speeds people have gotten "tacho madness". THe inlfuence is 3D it keeps the raction time fast but a lot of the time make tip vortices and blade drag are eating up a lot of power.

Using more voltage will enable you to reduce amps (and with it heat)and give you more choices of cell motor and esc. ie optimise performance and cost

Andrewg - electric - the faster option
05-13-2007 Over year old.
HOMEPAGE  
 
 
1 page1419 viewsPOST REPLY
CanoMod . Futaba-RC . A Main Hobbies

.
.
e-Electric Conversions > JR Venture 30/50 Airwolf Conversion
 PRINT TOPIC Advertisers 

Subscribe to This Topic

Thursday, November 20 - 12:14 am - Copyright © 2000 - 2008 runryder.com | email | link to rr | runryder needs cookie