thank you sir...thanks for the advice...i asked because of my inexperience in R/C water based crafts...sure i made a CLYDE PUFFER, a 3 feet long, is driven by a heavy motor,taken out from a car wiper assy, its powerfull.but when i start the controls,it propels foreward,but soon it drops its nose down, and the same attitude increases as it runs fast...but it stabilises when i releases my finger from control..yes its drive shaft is too steep, as to save space for a heavy battery...i hope its prob may due to the high angle of prop shaft...so now i can change it... thanks once again...and expecting more advices....have a nice day....
