Glow to Electric Conversions Discuss glow/gas conversion to electric here.

Holman FW190 conversion

Reply

Old 02-20-2014, 12:24 PM
  #1  
voodoodb
Thread Starter
My Feedback: (97)
 
voodoodb's Avatar
 
Join Date: Jun 2002
Location: Flora, MS
Posts: 560
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default 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

Last edited by voodoodb; 02-20-2014 at 12:27 PM. Reason: Specs
voodoodb is offline  
Reply With Quote
Old 02-27-2014, 08:29 PM
  #2  
w0mbat
My Feedback: (1)
 
w0mbat's Avatar
 
Join Date: Dec 2001
Location: Cape Coral FL
Posts: 517
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default

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.
w0mbat is offline  
Reply With Quote
Old 03-26-2014, 08:32 AM
  #3  
aeajr
My Feedback: (2)
 
aeajr's Avatar
 
Join Date: Jan 2003
Location: Long Island, NY
Posts: 8,567
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default

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.





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]

Flight times can be increased by reducing the throttle or by using two battery packs connected in parallel. Please note that the weight of the motor mount is not included in the system weight. The weight of the different mounts can be found on the ElectriFly web site. This is configured for a 12S Lipo pack.

Last edited by aeajr; 03-26-2014 at 08:36 AM.
aeajr is offline  
Reply With Quote

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off


Thread Tools
Search this Thread

Contact Us Archive Advertising Cookie Policy Privacy Statement Terms of Service