good question, in my experience with full size boats, it usually happens when the drive is trimmed up and theres too much weight up front. I would try moving the center of balance aft, if that doesnt work try moving it forward, if that doesnt work.........trim tabs. And by changing the balance I'm referring to moving the batteries forward or aft.
btw, the jet-villain is going to stay a jet villain, but it'll be a month or so before it's rebuilt and the new villain WILL have a surface drive. I've made my decision. It'll be neat to have two working villains.
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Why wouldn't it work? Would prolly work pretty good, except if one pontoon is up high other down low etc... as going through rapids.
Hey quicksilver I moved all the stuff right to the front of the boat. The nose was almost submerged and the rear was out of the water so much that the jet couldn't start unless I forced the rear under the water to get it going. This corrected some of the porpoising until I hit 2/3 then it just came back.
Idea's to fix this? I would like to use trim tabs as a last resort, should I pull out the drive and cut more off the hull? It seems that the front is too buoyant, and maybe reset the drive so the jet is shooting lower(right) to get the hull down?
Oh yea... If I did go the trim tab route, where to stick... outter edge, middle close to centre?
< Message edited by headhunter23 -- 10/29/2007 4:15:04 AM >
Why wouldn't it work? Would prolly work pretty good, except if one pontoon is up high other down low etc... as going through rapids.
Hey quicksilver I moved all the stuff right to the front of the boat. The nose was almost submerged and the rear was out of the water so much that the jet couldn't start unless I forced the rear under the water to get it going. This corrected some of the porpoising until I hit 2/3 then it just came back.
Idea's to fix this? I would like to use trim tabs as a last resort, should I pull out the drive and cut more off the hull? It seems that the front is too buoyant, and maybe reset the drive so the jet is shooting lower(right) to get the hull down?
Oh yea... If I did go the trim tab route, where to stick... outter edge, middle close to centre?
I think you should mod the hull, or buy a different one, from the pics(thx for the pics btw), it looks like the mid section is way to deep, kind of like a whale shape. Getting rid of that would be tough, but it can be done with a cutting wheel and fiberglass. I think this hump is causing the problem you could try trimming the boat up. jet boat like a constant dead rise, that's a big reason I keep sticking with villains. To fix it without major surgery, tabs could work, I would put them maybe a 1/2" from the centerline, I would try trimming the bow up and try the batteries all the way back one more then, it's a matter of fine tuning it. tabs maybe Aft I took off my trim tabs on the villain, it chine walked wildly at WOT.
here's a picture representation
< Message edited by Quicksilver -- 10/29/2007 5:06:06 AM >
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I to have the same problem with hopping i can only go about 5/8 to 3/4 trottle on the mini- v hull . it has gotten a little better after flating the bottom out .
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I think I will do the mid section mod first. Essentially tape the whole hull down evenly to a block then either have a friend with a bandsaw saw it slice it evenly or make up something here that can cut it evenly or atleat beable to check as I grind away. I have 2 weeks till batterys come anyways. Thanks for the suggestions... was thinking the same last night when I slept on it.
Dragonfire I thought you were going to trim more hull away...
Btw this is an edit to the post. Just a couple more questions to clear up before I start cutting. First the jet drive doesn't seem to sit flush on the bottom. Is there a way ... kinda difficult to get across but should the grills be pararell to the hull? Or should they be angled up a bit at the front for better suction which would then have the jet trimmed down (uh shooting lower, to get more hull into the water). Any other ideas suggestions would be appreciated.
Ivan.
< Message edited by headhunter23 -- 10/29/2007 5:10:43 PM >
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Yeah i cut a lot i edit your pic to show how much i cut out . i dont have a pic of it yet but ill get one on tonight . i used a cutting wheel after drawing the cut lines on the hull. and used a sheet of alum to fill in the gapping hole and glassed it over i even bent the sheet in to a arc or channel to force the water in the inlet. you already have some downwared angel on the nossel becouse on the angel on the transom
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So you think the angle of the jet drive is ok? Just leave it? I would have to cut right to the last horizontal line at the top to make it flat with the drive.
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All Forums >> RC Boats >> Speed - Electric >> RE: The Unofficial all things Jet drive thread 
RE: The Unofficial all things Jet drive thread - 
RE: The Unofficial all things Jet drive thread - 
