Cleaver or Yamaha Drag on a tunnel

[Mr. Demeanor]

Its finally running right and I can get to work on setup. Running a 22 Chopper and a 23 Trophy Plus now. Chopper is easier to steer (little torque steer). Trophy Plus is faster but steering is a battle. Both get up on plane with the engine high. Both are at 4% slip and I am probably too high right now as slip goes up when I burn off some fuel. I am 2-1/8" above the bottom of the sponsons which are pretty flat at the back.
Would a cleaver or a Yamaha drag prop run better? Both are rare in the size I need so I probably wont be able to test both.
Boat is a 13' tunnel with 130hp Yamaha. Tunnel is 6" deep at the transom and engine is on 4" jackplate. Boat runs best at neutral trim.

Pic:
http://img.photobucket.com/albums/v399/MrDemeanor/Biel/PICT0008.jpg

[200valeroyt]

cleaver would probably be impossible to get on plane without a hyd plate to bury prop. pretty cool boat you have there, watch out with the trim button!

[baja200merk]

I would be attempting to find some sort of ET. They have less bow lift then a chopper but cruise 3x better then a cleaver. I would think your chopper would not mind being run a bit higher then the through hub but you have a pretty unique setup so the only way to know is to try it :D

Keep us posted, looks like fun :thumbsup:

[leading edge propeller]

Hey Chris. We could take one of the choppers and cut it to a ET, that would be the best of both worlds it's between a chopper and a cleaver, you will gain RPM'S as well over the full blade chopper. Rich

[Mr. Demeanor]

Thanks guys.
I bought a 24 Yamaha Drag. It may be too big but should at least give me an idea of what to run.
The Chopper I have is a 22. It is currently mounted 2-1/8" above the lowest part of the sponsons. Pops right up on plane but its so high that with a light fuel load, the boat starts bucking as the prop slips and grabs. With a half tank I am at 4% slip.
The boat is VERY sensitive to weight. I ra the trophy the other day and it was fine by myself but put someone in the passenger seat and the prop sits higher and blows out. I am probably a little too high and need to find a top speed spot and then a evry day day spot.
My bet is still on a 22-24 pitch LaserII. That style prop ran great, better than anything else even with the engine buried. If I can get on plane with a LaserII withe the engine up now that I moved some weight around, I think it will fly.

trim switch????
:)
http://img.photobucket.com/albums/v399/MrDemeanor/Biel/Capture1.png

[Mr. Demeanor]

Is my boat technically a tunnel or a catamaran? What is the official difference?

[Miss Isle]

cleaver would probably be impossible to get on plane without a hyd plate to bury prop. pretty cool boat you have there, watch out with the trim button!

I've been using a 32' cleavor on My HEAVYHydrostream Voyager XT for years. I don't have a hydrolic jack plate, though I used to use a 10" setback.

I am able to put my boat on plane and run 83 mph with 4 adults and a cooler.

[200valeroyt]

I've been using a 32' cleavor on My HEAVYHydrostream Voyager XT for years. I don't have a hydrolic jack plate, though I used to use a 10" setback.

I am able to put my boat on plane and run 83 mph with 4 adults and a cooler.
Sounds good to me. Was referring to over trimming and blowing over.

[200valeroyt]

Miss isle, try running your cleaver an in or so over pad and see if you still get on plane.

[syclone01]

that high over pad with a cleaver will prob not get on plane without a hyd jackplate...good luck on that. Chris, i'll prob be down weekend after next. I'll bring the 23 srx chopper and let you try it, it worked great on the boat when i had the 90 yammie on there, no torque steer at all. But i was only running 58mph. Maybe you will have run the 22 prop i shipped to ken for you to try....hope it grabs on takeoff....

[Mr. Demeanor]

If your here on the 6th, that is the weekend of the cabbage Key run. You should come with.

[Mr. Demeanor]

Ive got quite the lineup of props to run. Testing is Friday.

22 Laser II
22 small ear chopper
24 small ear chopper cut down to 13" diameter
24 Yamaha drag prop
21 Trophy Plus

My bet is on the Yamaha Drag but I will not be surprised if the Laser II is very fast. I know the Trophy will run well from running a 23 but this 21 has a LOT of cup in the tip and may run very well up high. Lots work to do on Friday considering its a manual jackplate. The propshaft is currently 2-3/8" above the sponsons and sip is at 4-5% with a Trophy or Chopper so I probably need to start coming down.

[Miss Isle]

Miss isle, try running your cleaver an in or so over pad and see if you still get on plane.

I have since changed my setup and I'm not totally happy with it. I used to use a 10" setback and was about 1.5" above pad. I'ts a fixed jack so that's how it stays all the time.

Problem is I run a V-8 and it's too heavy with the setback (bad angle of attack). I've since made a custom 1" thick motor plate and I messed up on the up diminsions. I have the motor as low as I can get it and I'm loosing bite when the boat really gets up on the pad. It pulls hard to 87mph then the boat lifts and I loose bite, then it gets into a "porpoise type surging". I need to remove the plate, re-machine it and replace it. Just too lazy right now.

I have a much better angle of attack now though.

One other note, I'm using a V-6 gearcase on the V-8 and a 32 cleaver.

[Mr. Demeanor]

My boat would do that same high speed porpoise/surging losing bite and grabbing with the other props but it stays hooked up with the Yamaha Drag. I may try going even higher. Currently 2.5" above he bottom of the sponsons. Picked up 3-4mph with the drag prop but never did find a cleaver to run. Pretty happy with the current performance.
Your prop could probably be worked to hold a little better.

[Miss Isle]

My boat would do that same high speed porpoise/surging losing bite and grabbing with the other props but it stays hooked up with the Yamaha Drag. I may try going even higher. Currently 2.5" above he bottom of the sponsons. Picked up 3-4mph with the drag prop but never did find a cleaver to run. Pretty happy with the current performance.
Your prop could probably be worked to hold a little better.

When I was running my Monty V-6 on the 10" setback and the cleaver, I topped at 98mph with slightly more than even trim. The boat picks straight up out of the water and lays perfectly flat. Not like most Hstreams that ride so bow high. I'm chasing that setup with the V8 now. I know that the cleaver is good, cause I've already had Nirvana with it.