Terry Keeley
Well-Known Member
- Joined
- Jul 24, 2002
- Messages
- 7,221
My F.A.S.T buddy Mike Nowicki built a nice JAE 21 and after getting the bugs out we were trying to make it go fast but were having a heck of a time with the handling.
It would run great with 1450's in the low 60's and even got up on a 1650 but it was too much so we tried some ABC 1819's, one that was cut way down that was too little and another that was full blade was too much. We started trimming back the TE kicker (progression) on the full blade one and it just threw water in the air, shoved the nose down and pulled hard right.
He tried the stock Zipp fin and it was "twitchy" as hell, trimmed it back some and it helped. He made a thin ti fin (similar to Dave Preusse's) that was better but it was still way too touchy, 1/8" rudder travel would put it inside the buoys. Rudder is Speedmaster mini, strong Savox servo and solid pushrod, boat alignment good. He started with the sponsons parallel and later towed the right one in 1/4" or so, no difference. Booms are solid 5/16" CF.
The CMB Beta 21 was running good after a careful break in, AB quiet pipe and OPS 3280 at 8", 60% fuel, various plugs.
Any suggestions?
It would run great with 1450's in the low 60's and even got up on a 1650 but it was too much so we tried some ABC 1819's, one that was cut way down that was too little and another that was full blade was too much. We started trimming back the TE kicker (progression) on the full blade one and it just threw water in the air, shoved the nose down and pulled hard right.
He tried the stock Zipp fin and it was "twitchy" as hell, trimmed it back some and it helped. He made a thin ti fin (similar to Dave Preusse's) that was better but it was still way too touchy, 1/8" rudder travel would put it inside the buoys. Rudder is Speedmaster mini, strong Savox servo and solid pushrod, boat alignment good. He started with the sponsons parallel and later towed the right one in 1/4" or so, no difference. Booms are solid 5/16" CF.
The CMB Beta 21 was running good after a careful break in, AB quiet pipe and OPS 3280 at 8", 60% fuel, various plugs.
Any suggestions?
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