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Jon and V Boat Conversions & Modifications
Jet Jon Build Pics ...VIDEOS LINKED!!!!!!
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<blockquote data-quote="Ride_Klein" data-source="post: 227771" data-attributes="member: 6976"><p>Video helps. </p><p></p><p>You mentioned in an earlier post that it ran better without weight up front. Were you referring to top speed or was your cavitation problem worse with the added weight up front? </p><p></p><p>Looks like you might have a small problem with porpoising as well. (Boat wanting to bounce up and down on plane in pretty smooth water) Was this simply from hitting your own rollers, or does the boat bounce as you approach top speed? If it does porpoise, that isn't helping your cavitation problem any. You can remedy porpoising a couple of ways. The easiest is to simply add more weight up front. Use something you can move easily while running and see if that fixes your problem. Of course this solution is pretty useless if more weight up front makes your cavitation problem worse. </p><p></p><p>Other solutions for porpoising include trim tabs or adding wedges to the hull.</p><p></p><p>Example of wedges.</p><p>https://www.duckboats.net/cgi-bin/forum/gforum.cgi?post=27369</p><p></p><p>You can test wedges pretty easily using a piece of wood that's taped to your hull with duct tape. This lets you try a couple different degrees and sizes of wedges to see if they help before you do any major work. </p><p></p><p>You should be able to use the same technique to test any spoon modifications. Get some shape-able foam blocks from a craft store and mold/cut them to your desired shape. Tape 'em on there and hit the water. You can test a couple different setups this way without having to permanently modify anything on the boat. They won't hold on all day, but when they let go they're easy to find.</p></blockquote><p></p>
[QUOTE="Ride_Klein, post: 227771, member: 6976"] Video helps. You mentioned in an earlier post that it ran better without weight up front. Were you referring to top speed or was your cavitation problem worse with the added weight up front? Looks like you might have a small problem with porpoising as well. (Boat wanting to bounce up and down on plane in pretty smooth water) Was this simply from hitting your own rollers, or does the boat bounce as you approach top speed? If it does porpoise, that isn't helping your cavitation problem any. You can remedy porpoising a couple of ways. The easiest is to simply add more weight up front. Use something you can move easily while running and see if that fixes your problem. Of course this solution is pretty useless if more weight up front makes your cavitation problem worse. Other solutions for porpoising include trim tabs or adding wedges to the hull. Example of wedges. https://www.duckboats.net/cgi-bin/forum/gforum.cgi?post=27369 You can test wedges pretty easily using a piece of wood that's taped to your hull with duct tape. This lets you try a couple different degrees and sizes of wedges to see if they help before you do any major work. You should be able to use the same technique to test any spoon modifications. Get some shape-able foam blocks from a craft store and mold/cut them to your desired shape. Tape 'em on there and hit the water. You can test a couple different setups this way without having to permanently modify anything on the boat. They won't hold on all day, but when they let go they're easy to find. [/QUOTE]
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Jet Jon Build Pics ...VIDEOS LINKED!!!!!!
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