ORIGINAL: n19htmare
Finished putting my ARF Avistar together. MY first build EVER! I think it went pretty well and I'm hopeful that it'll fly
. I still have not measured my throws yet.
I have a few questions though.
1) My CG is at 1.5" with this setup. Very nose heavy with OS .46AX, What is the best way to add weight to the VERY back?
2) When I have my charge port plugged in, the light on the receiver (AR6200) come on slightly and it sounds like servos are getting power, but the charge light is lit on the power adapter and switch is in OFF position.
3) I was at 1.25 turns out on the needle on my OS.46AX and it was stilling spewing oil all over my wing. normal? Fuel is OMEGA 15%. after running, lot of oil drips out of the exhaust when I tip it.
4) What is the optimum RPM range I need to shoot for with a 10x6 or 11x6 propeller?
5) I'm also confused on the hinge gaps.... should there be any? None? Little? I have little gap, nothing huge but noticeable. Is it ok on a trainer?
6) Anything abnormal with my setup in pictures?
7) Can you lend me $5?
TIA
1. The 46AX will make the airplane nose heavy. Did you try moving your battery behind the servo tray or securing it to a former down the tail?
2. I am not familiar with that receiver, but if the switch is on the battery shouldn't be able to charge.
3. Oil and raw fuel exhausting from the engine is normal. Just make sure your engine is adjusted (mixture) properly as stated in the manual. Once you get the hang of it you'll be able to adjust it without the book each time you go to the field.
4. I wouldn't worry about an "optimum" RPM. Raise the throttle and turn the high speed needle in until the RPM peaks then back off several clicks. Depending on your level of break-in the engine could turn those props anywhere from 10,000 - 12,000. Don't try to squeeze every bit of power from a new engine; you'll just ending up shortening its lifespan.
5. A little gap is normal. If you are concerned about an overly large gap you can use clear tape to seal the gap. It's a bit tricky to insert the tape so that the surfaces can still fully move. Basically, you fold a strip of tape in half the long way and deflect the surface all the way. You then take a credit card and slide the tape down inside the hinge gap. This way when the surface is fully deflected the tape will not be fully stretched.
6. No foam around the tank is not ideal, but the cavity in the Avistar is too small to add foam. It will be okay.
7. Your rubber bands are installed incorrectly. The rubber bands should stretch from front to back on the same side.
The last two rubber bands are cris-crossed. You should be using 10-12 rubber bands.
7. NO!