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I cut, and sanded the motor rails in half. They are longer than I will probably need. i wanted to see the motors before I design the motor mounts.
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Ken, Yeah, I have been thinking of using smaller gauge wire for the wheels, but if you think I should keep what I have I'll do it. I'll post pictures of a motor next to a nacelle later on, I just got up for the day.
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Ken, here ya go... I appreciate you following along. Are they too small?
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The rudder perimeter. It's double wide but will be sanded to a pointed edge. For the nacelle sections which are over / under the wing I might make them with 1/32" sheet. I'm going to make a paper model to see if that's feasible. I'm either going to sheet the nacelles from the LE to the motor, or tissue rather than use the plastic parts.
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Quote:
I weighed mine a couple of years ago but can't remember were I wrote it down! It was somewhere in that range, I need to take it off the wall and weight it. Anyway, I think you will need a minimum of a 3s 1300mah batt and that only got me a 3 minute flight ! I got out the file on the Guillows B-17 (thank you for making me get it out ) and looked at a few notes and plans. My batt weighed 3.7oz and battery technology has improved since then so lighter may be possible. I just finished and maiden the Guillows PBY that weighed 17oz before batt and I used Detrum BM - 2800A 810 KV motors that is the same batt as the B-17 I would say I could go with a slightly smaller power system. Try and place the electronics as far forward as B3 as you can, it's a big a## bird, it will help with the CoG . |
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If I knew the maximun weight four of the motors I have will work for I can go from there. Ken, did you discover the CG is right at where the plan indicates for C/L?
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Sounds like around 25 % back from the LE at the root. That's exactly what Andy Lennon calculated for RC planes in his book.
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Bruce said a total weight of 16 oz would be okay.
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Here's the rudder:
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Quote:
http://adamone.rchomepage.com/cg_calc.htm And odd though it sounds put in 5 (%) for the stability margin figure. |
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