FRONT BALANCES and BACK BALANCE

FRONT BALANCES
To anticipation the unstable of front air tube balances when the prototype nose too up, too float, or too depth .we can to fill the front balance weight with small ball iron.

BACK BALANCE
To anticipation the unstable of back air tube balances when the prototype back part too up, too float, or too depth .we can to fill the back balance weight with small ball iron.