IMPBA or NAMBA legal?

[jken1995]

Hello,

Not for sure if this question has been asked before?(probably has) Are outboard monos legal for racing in the mono class? I am really interested in the IMPBA sanctioned events. I could not find anything in the rule book stating that it would not be, but I just want to make sure. Thanks for any help you can offer.

 

[tnrcboatracer]

Hello,
Not for sure if this question has been asked before?(probably has) Are outboard monos legal for racing in the mono class? I am really interested in the IMPBA sanctioned events. I could not find anything in the rule book stating that it would not be, but I just want to make sure. Thanks for any help you can offer.

Yes they are, but you would have to run against the piped inboards.

 

[jken1995]

Yes, I know the inboards would have the advantage. I just wasnt for sure if they were legal. Thanks for the help.

 

[FloridaScaleBoater]

Hello,
Not for sure if this question has been asked before?(probably has) Are outboard monos legal for racing in the mono class? I am really interested in the IMPBA sanctioned events. I could not find anything in the rule book stating that it would not be, but I just want to make sure. Thanks for any help you can offer.

Yes they are, but you would have to run against the piped inboards.

You can pipe an outboard also

 

[jken1995]

Has anybody had any success with a outboard mono with a pipe?

 

[FloridaScaleBoater]

How about we start with, what hull are we talking about?

If your talking an old Prather hull, it probably won't stand a chance against, say a Seaducer.

Jerry Crowther "purpose" built a 33" ducer to take to the NAMBA NAT's in L.A. Cali. a few years back, and it just crushed the competition, in the O/B MONO class. The boat was sold before the racing was over.

 

[NAMBA860]

Has anybody had any success with a outboard mono with a pipe?

i run the .21 mono class although im not piped right now i have ran a pipe on an o/b mono before and had very good sucess. i run a 33 inch calcraft hull with a 3.5 k/b with exhaust throttle. i raced in camarillo,ca about 2 months ago and won the class. the two other boats were much faster then mine they ran a nova rossi and the other was a cmb both with pipes but my consistency won the race. just remember the fastest boat doesnt always win. this was the class i started in 25 years ago as a 13 year old kid and i think its still a blast sorry to see it dieing.

 

[jken1995]

Actually I don't have any hull in mind at the moment. I just wasn't familiar with past efforts with an outboard mono setup. It just seems that there is a large outboard following if you look at the tunnel classes especially in the "B" class, and I thought more outboard people would be trying to run the mono class. Its just something I was thinking about.

 

[John Finch]

Actually I don't have any hull in mind at the moment. I just wasn't familiar with past efforts with an outboard mono setup. It just seems that there is a large outboard following if you look at the tunnel classes especially in the "B" class, and I thought more outboard people would be trying to run the mono class. Its just something I was thinking about.

I played with the concept a few times. The biggest issue I had was when the outboard turned........ the hull would turn as expected, but then the prop continued to push forward making the boat spin out. I had to run a skeg to prevent spinout. After several attempts on several boats I decided it was best for the prop to be stable and use the rudder to turn. I locked down the outboard and the used a rudder to turn the boat one time. The inboard was easier to use for all out speed, and the weight distribution of an inboard lets the boat fly level when it leaves the water, so I went back to the inboard for racing. The outboard on a mono will work and it is legal. You got that from the mono director at IMPBA.

 

[namba276]

Guys, A few years back I took a dumas skdaddle 60 and mounted a K&B 7.5 OB with a pipe. That boat hauled the mail in the straights. not for heat racing... but sure had fun in the evening after the races

Bob

 

[jken1995]

Actually I don't have any hull in mind at the moment. I just wasn't familiar with past efforts with an outboard mono setup. It just seems that there is a large outboard following if you look at the tunnel classes especially in the "B" class, and I thought more outboard people would be trying to run the mono class. Its just something I was thinking about.

I played with the concept a few times. The biggest issue I had was when the outboard turned........ the hull would turn as expected, but then the prop continued to push forward making the boat spin out. I had to run a skeg to prevent spinout. After several attempts on several boats I decided it was best for the prop to be stable and use the rudder to turn. I locked down the outboard and the used a rudder to turn the boat one time. The inboard was easier to use for all out speed, and the weight distribution of an inboard lets the boat fly level when it leaves the water, so I went back to the inboard for racing. The outboard on a mono will work and it is legal. You got that from the mono director at IMPBA.

I never thought about locking the engine down. When you did this and used a rudder for steering did you not use the skeg? Do you thing different degrees for the "vee bottom" would work better for an outboard? That SK-Daddle had to be fun to drive Bob.

Jeff

 

[Mark Poole ModVP]

Locking the engine and using a rudder does make the boat handle much better. I have an outboard mono set up that way. This is perfectly legal in IMPBA but it is not in NAMBA unless they have changed the rule. I will try to get some pics of my boat posted soon.

Mark

 

[jken1995]

Locking the engine and using a rudder does make the boat handle much better. I have an outboard mono set up that way. This is perfectly legal in IMPBA but it is not in NAMBA unless they have changed the rule. I will try to get some pics of my boat posted soon.
Mark

Thanks Mark. I would appreciate it.

Jeff