Brushless Jenny
02-19-2008 | 08:22 PM
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From: Dayton,
OH
Brushless Jenny
Okay, well have mostly completed my Sig Jenny with some added modifications such as reinforcing the bottom and top wings, reinforcing the horizontal stab and vertical stab, and adding some control linkage tubes to keep the wires straight. All in all I am extremely pleased with the way she has turned out, but that stock 180 motor is horendously underpowered. With that being said it has to be brushless! What size motor should I use and ESC? I'm using a 7.4V 1200mAH lipo. I am new to the brushless motor deal, but not flying so I need some guidence on a good motor/esc combo for my jenny that will yield a good performing little plane. Also will there be any other modifications I might need to make to my jen in order to fit the motor or will it bolt directly to the firewall? I would like to get her up and going this weekend so any help would be great! Thanks!
02-20-2008 | 12:56 AM
#2
RE: Brushless Jenny
The Great Planes Electrifly Rimfire 28-22-1380 is a great choice for a brushless upgrade for a brushed speed 180 and it's only $24.99. You can use most any 10A brushless speed controller you'd like. E-Flight makes a nice one with a JST connector for the battery and 2mm female bullet connectors that will match up nicely to the 2mm male bullet connectors on the Rimfire 28-22-1380. The E-Flight 10A brushless ESC runs about $27.99
Your 1200Mah 7.4v LiPo cell will run forever on this power combo, in fact, a 640Mah battery would give very long flight times. If you try to fly it with the 1200Mah battery, you'll likely want an adapter cable so you can connect it to the JST connector on the speed controller. You might consider spending $20 or so for a 640Mah 7.4v LiPo to reduce weight.
As for screwing the engine directly to the firewall, you would probably be better off buying the Electrifly GPMG1250 small electric motor mount. At $14.99, it's almost as much as the motor, but it will allow you to better position the motor out away from the firewall so you can fit the cowling over it for final flight.
Good luck, and post some pictures of your new brushless Jenny!
Your 1200Mah 7.4v LiPo cell will run forever on this power combo, in fact, a 640Mah battery would give very long flight times. If you try to fly it with the 1200Mah battery, you'll likely want an adapter cable so you can connect it to the JST connector on the speed controller. You might consider spending $20 or so for a 640Mah 7.4v LiPo to reduce weight.
As for screwing the engine directly to the firewall, you would probably be better off buying the Electrifly GPMG1250 small electric motor mount. At $14.99, it's almost as much as the motor, but it will allow you to better position the motor out away from the firewall so you can fit the cowling over it for final flight.
Good luck, and post some pictures of your new brushless Jenny!
02-20-2008 | 07:57 AM
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From: Dayton,
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RE: Brushless Jenny
Thats great advice! Thanks alot for helping me out! I'm going to try and post pics of my build, thanks again! Also I am guessing that when finished my jen will weight about 10.4 or 10.8oz, will that size motor have enough power?
