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Guillows Series 400 - P-51 Mustang by SteveM. Viewed 970 times.
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Image Comments
SteveM14-Feb-08 16:56
GWS LPS-RXC-AS with EP-8043 prop and 300 mAh LiPo battery. 1.9 A @ 7.68 V and a delightful amount of torque.
harve14-Feb-08 18:04
I can't wait to see it installed. How long do you think the flights will last?
SteveM14-Feb-08 23:44
I'm not sure, but it should go till battery voltage hits 6 volts and my protection circuit kills the motor. I'll have to look at a battery datasheet to estimate how long that will take.
hjlittman15-Feb-08 22:22
That's the same power plant that's going into my 400 Series Bf-109 except that I have a Star*Link-Flite Tech FWS_0 timer in the circuit. Since I will be flying free-flight at the Grassy Knoll, also called the "Minute Field" I'll need the timer to keep from loosing it. The timer is also a speed controller, allowing low powered flights for trimming. The only thing sticking through the side of them model is a tiny LED light, (about 1/16 inch diameter, that blinks to show what program the timer is running, and the tiny switch (about 3/32 inch diameter) button that you use to program the timer and start the motor when you launch.
SteveM15-Feb-08 23:10
I'm glad to hear that you are using it too, I wasn't sure if I had gotten the proper motor. Initially I will just have the battery protection circuit but I am already planning to design my own ESC.
jgood19-Feb-08 17:20
I used a 250mAh battery on my r/c Guillows Fairchild 24, and could get 10 minute flights out of that. Isn't that going to be too long for a free-flight flight?
hjlittman19-Feb-08 17:50
Assuming that the timer works properly, no. The idea is that you charge the thing up and with 25 to 30 power runs you can fly all morning on one charge. Of course, the assumption is that electronic timers are more reliable than the old mechanical ones. (If anyone cares, will tell the long "one that got away" story off list.)
hjlittman21-Feb-08 11:11
Just realized that my last comment makes more sense if the word "second" had not been left out after "25 to 30".
SteveM10-Mar-08 15:47
Considering that my last electric FF plane is presently stuck at the top of a tall tree, and that I now own an RC tx/rx system, I am thinking of adding rudder control to this plane. I also happen to have a spare Pixie-7P (now that the One Nite 28 is stuck in a tree) that can act as a battery low voltage protect and has a BEC to supply the radio and servo. Maybe a pull-pull rudder?
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