Rangeley

Hey all
I am building a tunnel hull from plans Dirk provided to me. Does anyone know how to determine engine size for this model. It is 26.5 inches long and I would like it to be able to go up to 50 mph. Can anyone help?

Thanks
Duane

coriolan

26.5" is a bit short but a .21 size engine(K&B or OS) would do if you can find one!

ob nut

My Feedback: (1)

26.5" is not short for a tunnel. That is a good size to run a .21, stock or mildly mod'd motor. With the speeds you are wanting, I'd try the O.S., either V1 or V2 would work.

Rangeley

Thanks guys - that's what I've been leaning toward. I talked with a girl at K&B yesterday, didn't get far there she was clueless - I was amazed!!

ob nut

My Feedback: (1)

MECOA is a joke with regards to K&B motors. IMHO: Hades will freeze before you see a complete OB motor come out from them. My Hot Shot Sprint w/K&B SS would radar at 44 all day long. I'm in the process of moving over to O.S. for my .21 motors. One of the SS's will be placed on a "play" boat. My racing boats will have the O.S..

Rangeley

Well that's done! I ordered the O.S 21 outboard this morning. Now I have another question - it appears to me that the pull/pull steering setup would be the smoothest operation option ...........your thoughts please guys?

ob nut

My Feedback: (1)

The 4-40 rod / colars are the easiest to setup for steering. For my new setups, I'm switching all the steering to pull-pull. Hangar9 pull-pull wheel, Secraft wire tensioners and kevlar cord.