Holman FW190 conversion
02-20-2014, 12:24 PM
#1
Holman FW190 conversion
Need some input on an electric conversion for the Bob Holman FW190. Plans show a Webra Bully 35cc on nitro. Since it will need a ton of weight up front I was going with a Quadra 50, but I will have to ruin the cowl to fit it. I'm thinking my best bet is to go electric now to keep the clean lines. W/S is 80" and should come out around 22 lbs. I would like to get at least 7 or 8 min flight and use around a 20 or 22" prop. Can someone give me a little input? Have been reading the 3d sites but am not sure these setups would be what I need for a scale warbirds.
Thanks
Doug
Thanks
Doug
Last edited by voodoodb; 02-20-2014 at 12:27 PM. Reason: Specs
02-27-2014, 08:29 PM
#2
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Use an Electrifly 50cc Brushless motor, OS 100 amp ESC, Castle Creations Pro BEC and two 6 cell 5000mAh lipos connected in series to make a 12 cell pack. You can run a 20 x 10 or 22x8 on this setup and get about 7 mins with good batteries.
03-26-2014, 08:32 AM
#3
EVERYTHING YOU WANTED TO KNOW ABOUT ELECTRIC POWERED FLIGHT
http://www.rcuniverse.com/forum/m_7100376/tm.htm
This e-book will help you.
Also, using a motor selection resource can be helpful too. The Electrifly system works well. I have had good experience with the Rimfire motors.
http://www.electrifly.com/powersyste...tem-index.html
Here is a possible combination for your application. The calculator will let you vary the prop size, flight character, weight and other parameters. This is just one option.
http://www.rcuniverse.com/forum/m_7100376/tm.htm
This e-book will help you.
Also, using a motor selection resource can be helpful too. The Electrifly system works well. I have had good experience with the Rimfire motors.
http://www.electrifly.com/powersyste...tem-index.html
Here is a possible combination for your application. The calculator will let you vary the prop size, flight character, weight and other parameters. This is just one option.
Motor Recommendations
[TABLE]
[TR]
[TH][/TH]
[TH]Best Combination
[/TH]
[TH][/TH]
[/TR]
[TR]
[TD="align: right"]Performance
[/TD]
[TD]Sport
[/TD]
[TD][/TD]
[/TR]
[TR]
[TD="align: right"]Motor
[/TD]
[TD]63-62-250 / GPMG4795
[/TD]
[TD][/TD]
[/TR]
[TR]
[TD="align: right"]Gear Ratio
[/TD]
[TD]N/A
[/TD]
[TD][/TD]
[/TR]
[TR]
[TD="align: right"]Gear Drive
[/TD]
[TD]Not Required
[/TD]
[TD][/TD]
[/TR]
[TR]
[TD="align: right"]Propeller
[/TD]
[TD]18x8 in., Electric
[/TD]
[TD][/TD]
[/TR]
[TR]
[TD="align: right"]Battery
[/TD]
[TD]6400 mAh, 44.4v
[/TD]
[TD][/TD]
[/TR]
[TR]
[TD="align: right"]ESC
[/TD]
[TD]SS-100 / GPMM1870
[/TD]
[TD][/TD]
[/TR]
[TR]
[TD="align: right"]ESC Motor Adapter
[/TD]
[TD]Not Required
[/TD]
[TD][/TD]
[/TR]
[TR]
[TD="align: right"]Motor Mount
[/TD]
[TD]X-Large / GPMP1265
[/TD]
[TD][/TD]
[/TR]
[TR]
[TD="align: right"]Current Draw
[/TD]
[TD]66 amps
[/TD]
[TD][/TD]
[/TR]
[TR]
[TD="align: right"]Approximate Speed
[/TD]
[TD]66 mph
[/TD]
[TD][/TD]
[/TR]
[TR]
[TD="align: right"]Approximate Thrust
[/TD]
[TD]315 oz.
[/TD]
[TD][/TD]
[/TR]
[TR]
[TD="align: right"]Weight of Power System
[/TD]
[TD]63.6 oz.
[/TD]
[TD][/TD]
[/TR]
[TR]
[TD="align: right"]Approximate Flight Time at Full Throttle
[/TD]
[TD]6 minutes
[/TD]
[TD][/TD]
[/TR]
[TR]
[TD="align: right"]Watts per Pound
[/TD]
[TD]126
[/TD]
[TD][/TD]
[/TR]
[/TABLE]
Last edited by aeajr; 03-26-2014 at 08:36 AM.
