X-spec
Posts: 96
Joined: 5/28/2004
From: SINGAPORE, SINGAPORE
Status: offline
|
BUMP....................................... 
X-spec TKs!
quote:
ORIGINAL: X-spec
HI! PilotSmith,
The pictures shown below is what I 'm going to install, the 1st picture show is the SF(Super Flying Model) product from Taiwan and the picture is the brashless motor from GS BL B-20-40-7 this is a 2 pole motor. Here 's the website from my local hobby shop that bring in is product. The motor spec is size: 20 X 40mm, Turns :7, KV3800rpm/v, V:6-20v, Amp 25A.
http://www.jethobby.com.sg/cgi-bin/ezsite/prod/manager.cgi?action=show&pid=180&cid=20&idx=11
X-spec thanks.
Hi X-Spec,
You should probably post your question on the main electric jet page as this is my first EDF so I don't know if I can give you any good answers but here a few things that come to mind. The specs on your motor are: Size: 20x40mm Turns: 7 Shaft: 3mm Weight: 60g KV: 3800rpm/v V: 6-20v Amp: 25A. I know nothing about your motor. What Fan are you using with it? If you give me the specs on your airplane and fan, I can try to enter the data into MotoCalc to see if that gives anything of use. As far as LiPo batteries, do not get a battery that will be running at it's full C limit. If your application uses 24A and you get a 10C 2400 LiPo it will work but your battery will get hot and wear out fast if you use it regularly at 10C capacity. So get a battery that has more capacity than you need as you will get longer flight time and your battery will give you more charge cycles. PolyQuest has some 12-16C rated batteries like this one that probably would be good for a 25amp application: http://www.aircraft-world.com/shopexd.asp?id=2684 About $85 for a 3 cell good up to 31amp continuous or if you want to save weight for $70 you can get a 2200 3s pack good up to 26 amps continuous like this one http://www.aircraft-world.com/shopexd.asp?id=2680 . Good luck!
|
Printable Version
All Forums >> Electric Aircraft Universe >> Electric RC Jets >> RE: 3D-Foamy F18 EDF Mini Fan 480 Project 
RE: 3D-Foamy F18 EDF Mini Fan 480 Project - 
Hoping someone else also builds an 
At least I'm being consistent. Flight #1 ESC fried using 4 cell LiPo - front end wasted. Flight #2 throttle glitching and I got nervous and brought her down messy and bumped a pole - minimal wing damage. Flight #3 today: Range check fine. Flying in the middle of a dry lake in the middle of a desert, in the middle of nowhere so there was no interference. Take off is a little hairy as I still have the controls a bit too sensitive. Was messing with the dual rate switches on take off to see which mode felt better - one not enough and the other too much. Few seconds later after turning around and on the way back for a straight pass she becomes demon possed and does a sharp dive and a flip up. I also hear the throttle change in pitch. I decided to cut back throttle as at that point she is doing her own thing. I walk out to the plane and it is glitching real bad. Motor is turning on and off despite throttle being at zero and servos jittering. Damage is moderate. Have crack in rear fuse, one broker vertcal stabilizer, and cracked up 
