trim tab angle

[Steve McGinley]

Yeah, I'm not looking to break any speed records with this boat. I just want it to be stable.....which seems damn near impossible. So you truly believe its all in the trim tab angle? I have read SO many threads on tuning this boat and yet I just cannot seem to get it right. I have my impulse tuned perfectly, that boat screams! So you basically put the turn fins and trim tabs back to stock settings? Did you bend the little "tabs" on each trim tab? You should check out that youtube video on the fastech racing a blackjack, that fastech in insanely fast for what it is and I dont see that one hooking at all! This boat definately runs wet and I cant seem to get it right at all. Looks great up on my shelf though! I guess I will have to just keep playing with the tabs, just debating whether I should put the turn fins back to original settings.

[tlandauer]

I also think that the x642 generates alot of torque, hence the hull leans---torque roll, with the stock 1500kv motor and a 42mm ( I used x442, less pitch, however) the amount was tolerable, once the motor is faster and more powerfull, 42mm prop may not be the best choice. In retrospect I think a x642 ( wish I had tried that combo) and the original 1500 motor would have been a happy marriage. I was a newbie and didn't know ( still don't) what I was doing.

[tlandauer]

Yes, I did bent the corners of the trim tabs, but since I too wasn't looking to set speed records, and like a squirrel crossing the road, I made a "dash" back where I came out sensing danger ahead!
I restored everything.
That other post said moving the batteries rearward helped, since my hull won't take this operation, I wonder if I put some lead weight as ballast would help.

[Steve McGinley]

I tought the same thing with the weight, maybe leave the batteries in the stock location but add some weight to the rear. I have access to automotive strip tape weights that we use on wheels to balance them. I should try weighting down the rear of the boat and see what happens. Did your strut height seem to make any difference at all? It really didnt do anything for me, raising or lowering the strut, the boat still hooks. What I cant understand though is that from reading all the posts on this boat, this problem doesnt seem to be that prevelant. Really not many are having this issue? Only have I read that you had this problem enough to cause the boat to capsize? I can tell you I actually had two fastechs, I sold one, that one had the same problems also. Ive had my eyes on a genesis, maybe I should just sell this thing and buy a genesis, that too is a sweet looking boat. Thanks for trying to help me, I am just so frustrated with this thing.

[tlandauer]

Well, I bought this one way back and although I didn't have running issues I did have a water intrusion problem, that was before I found out this forum and didn't think about putting a piece of silicone tube at the stuffing tube in the hull. Anyway, I say this to tell you I probably had the first batch.
I could not change much in terms of strut height or angle because the design of the assembly did not have margin to be moved about. At that time I tried the Proboat metal props with the original 1500 kv motor and ran well, but that is a heavy prop and although I was led to believe that it is balanced out of the box. The little remaining inbalance quickly translated to accelerated wear on the bushing.
Now, when I ordered a replacement strut, it was shorter than my original one and I can def move the angle, the shorter length allowed room for it to move w/o binding the prop shaft. I have a bit of "positive" angle dialed in. In terms of height adjustment, not much can be done, the exit of the stuffing tube is encased with the hull and only a short distance to the strut, I tried to set it as high as I can.
I agree it is a sweet looking boat and if you can keep it, should keep it, IMO. I know the moment I let go of something i regret and start all over again to acquire it, well, I am hopeless!
Good luck with tuning your boat, love to hear/see how it works out for you.

[sanyijr]

T-

Just to restate: you are running a 2000kv...so I would think a 42mm is too much... For reasons you stated. The torque roll is bad with that size prop... I have the stock setup and a prather 215 (similar to the X642) and the thing rips! The dog-ears STOPPED the chine walk. The angled stabs STOPPED and roll in the turns! Make sure your CG is good! Strut angle on mine is about +2 degrees... It took some tweeking, but that thing should handle high 30's low 40's like on rails! I have mine set up so that I can make a 10 foot diamter turn at full throttle and NEVER roll...

The one time I rolled was on a straight, and a plastic bag wrapped around my prop... That boat rolled over like nothing I have ever seen.... And my boat sank...but I swim like a dolphin and got it ...But follow the advice Darin has on here about mods. It does work super well... But if torquing is still and issue, i would suggest a X440 or maybe even a X638-X637... I know it's small, but if you have it, it might work out... I run a DF 26 on an 1800 Aq motor... and I love the handling on the X638. i get like 10 mph more on my X642, but the torque rollin is not managable... and my run times are 2x better on the smaller prop...

[tlandauer]

T-

Just to restate: you are running a 2000kv...so I would think a 42mm is too much... For reasons you stated. The torque roll is bad with that size prop... I have the stock setup and a prather 215 (similar to the X642) and the thing rips! The dog-ears STOPPED the chine walk. The angled stabs STOPPED and roll in the turns! Make sure your CG is good! Strut angle on mine is about +2 degrees... It took some tweeking, but that thing should handle high 30's low 40's like on rails! I have mine set up so that I can make a 10 foot diamter turn at full throttle and NEVER roll...

The one time I rolled was on a straight, and a plastic bag wrapped around my prop... That boat rolled over like nothing I have ever seen.... And my boat sank...but I swim like a dolphin and got it ...But follow the advice Darin has on here about mods. It does work super well... But if torquing is still and issue, i would suggest a X440 or maybe even a X638-X637... I know it's small, but if you have it, it might work out... I run a DF 26 on an 1800 Aq motor... and I love the handling on the X638. i get like 10 mph more on my X642, but the torque rollin is not managable... and my run times are 2x better on the smaller prop...

I did go down to a x440, and ran with stock trim tabs and turn fins, I don't think I had them adjusted well, but I took the motor out because I got a PB 1800kv motor, now using x442. No torque roll. Mine also sank once and I lost the hatch, good thing at that time they had a few left at Horizon. The reason I no longer run this boat is that I really love the looks of it and the hull is just at the threshold of developing hairline cracks, I would like this boat be a shelf queen.