aznewmanfan

I just bought a 37 inch AC models wave slave, it has a go .21 engine and it needs a prop. I have gotten a couple recommendations, one of which is a 40x 52x3 aquacraft and the other is a 40x53x2 aquacraft. My friend had a 3 blade on his blackjack 55 & it had a little more top end but it cavitated real bad. Will any 3 blade cause more cavitation? Or maybe his prop wasn't sharpened & balanced properly. (not likely cause he's a perfectionist) I'm not racing so I'd rather have the low end drivability & sacrifice a couple mph. Any info is greatly appreciated!

61manx

iTrader: (1)

Hi,
I do not run gas at this time.
But I do run a lot of FE mono's and do like using three blades for for them,
They help the boat run smoother and with less torque roll to.
I am not sure on the HP you have there with that motor,
But it would help if I could see how the boat runs with the s&b prop that you are running now,
And also what temps the motor is running at.
Than maybe I could help you find a good prop for that setup,
That will not over heat the motor and burn it up.
I am always on this OSE forums if you need any help,
Just look for Lenny hear. http://forums.offshoreelectrics.com/forum.php

Ron Olson

OSE won't do you any good as they don't like fuel burners very much. The problem is finding a prop that the boat likes. Yours isn't any everyday combination so it might take a few props unfortunately to find the right one. It might need someting as small as a 37mm or as big as a 42mm prop. A 40mm prop like the AquaCraft GrimRacer choices, an Octura X-or M-440 will put you in the ballpark. It might like a Prather 215 or 220.
Comparitively the Grimmie props are good buys as they're well-balanced and fairly sharp out of the package, they're decently sharpened but not cut the censored out of your fingers sharp.
With my old Speedmaster 21 with a Rossi (not Nova Rossi) in it I went through a lot of props trying to find one that the boat liked. As the engine broke in it wanted more prop. The dealer that I bought that motor from wanted my feedback on it as I was the first one to get one from him. My boat ended up by loving an Octura M-445. He didn't believe that it could spin a prop that large as it's made more for .45 engines.

aznewmanfan

I actually haven't even ran it yet. I'm just looking for a good starting point. It's going to be awhile before I can run it, the boat is torn apart right now and at the paint shop. Also, I am confined to an electric wheelchair and I'm waiting for repairs to be made to my wheelchair. What would you recommend for a starting point?

Ron Olson

Octura X-440 or the AquaCraft 40x53 then.

61manx

iTrader: (1)

I have a Proboat 36"shockwave that I modded to FE and I am running X646/3,
And getting about 45 mph on gps.
http://www.youtube.com/watch?feature...&v=ufp1qtvQias

I guess a x442 would be a good starting point,
It kind of a all around prop for that size of a hull.

Hear is a cheap way to test to find what props are going to run best for the setup.
http://www.offshoreelectrics.com/pro...led+Propellers
http://www.offshoreelectrics.com/cat...led+Propellers

Also like I said there are lots of guys that run both Gas & FE boats,
So you may find more help than you would think on OSE site.
Hears Just one post I have found by a search on yahoo for a prop for your boat,
But you can try a search on OSE site as well.
Or just put a post up for some info on your boat.
http://forums.offshoreelectrics.com/...-needed-please

Ron Olson

61, you're comparing apples to oranges here. With a nitro powered Shockwave we found an Octura M-445 to be a very good prop for that. Making it electric changes the game.
I run gas and nitro boats. I've done business with Steve a few times. I have been converting electric hulls over to nitro power, and have posted pictures of my builds there and the members just didn't seem to be interested.

31Bowtie

iTrader: (7)

This website has a wealth of information for boating nitro or electric . good luck


http://www.radiocontrolinfo.com/NitroBoat/propeller.php

Leo Franco

detailed info, helpful link