ORIGINAL: joco1
if a plane flys fine and level and then when you go inverted it heads down to the ground what is the problem and how do ya fix it?
ORIGINAL: joco1
...its a sky raider machII
It's nose heavy. The way I trim my Sky Raider Mach II's is to climb at a 45 deg. nose high attitude, full throttle and roll it inverted. What does it do? If it wants to head for the deck quickly then its nose heavy. If it wants to start a gentle ark the CG is set correctly, and if it wants to start climbing it's tail heavy. I have yet to have a Sky Raider Mach II that hasn't required some weight in the tail, regardless if I power it with a Super Tiger GS-40 or OS .46 AX.
You can shift the CG by moving the battery pack or adding some lead to the tail. It shouldn't take much lead to get it to balance correctly. If you add lead, add a 1/4 ounce at a time and it won't take long to find the CG where the plane is a happy camper.
Hogflyer