98-00 Miss Madison Newton Plans

[tom galdys]

Okay, I guess the main question is, does the prop HAVE to be in the center of the boat?

 

[dave weagel]

Okay, I guess the main question is, does the prop HAVE to be in the center of the boat?

good question.

I have no experience with offset prop locations.

I'd mount the strut on the transom centerline.

here's a 1/8 scale 8012 and the real 8012.

 

[Lennard Cuenco]

Okay, I guess the main question is, does the prop HAVE to be in the center of the boat?

yer the only one who can answer this.....

depends on how much the boat weighs....lighter boat, you prolly want to offset the strut to keep it down....heavier boat...maybe it doesnt matter

 

[tom galdys]

I can't answer it. Right now it has nothing to do with weight. What does the IMPBA say about prop position on an 1/8 scale boat

 

[Samuel Hagan JR]

I can't answer it. Right now it has nothing to do with weight. What does the IMPBA say about prop position on an 1/8 scale boat

Says nothing.

There's no rule on prop offset position.

Only rule is Drive Dog under the hull. The way it was explained to me it that most modern Hulls the drive dog sticks past the hull. On older Hulls the drive dog is under the hull.

Better yet. Go to www.IMPBA.net

 

[tom galdys]

Thank you

 

[Samuel Hagan JR]

I've ran Center and 1/4" offset from center and really couldn't tell a difference. Only difference I've seen is the angle the strut pointed towards the left Sponson about 1 degree.

 

[Lennard Cuenco]

I've ran Center and 1/4" offset from center and really couldn't tell a difference. Only difference I've seen is the angle the strut pointed towards the left Sponson about 1 degree.

beyond certain weight, it becomes irrelevant

 

[Hydro Junkie]

Sam, I don't think, when dealing with a scale boat, 1/4" is going to make a difference. That said, the further from center you go, the more it's going to affect the handling as it's going to want to turn toward the side furthest from the prop. Just a guess but I'm thinking that could be part of the reason the boats went back to a centered cockpit and engine bay, the reduced weight and higher power to weight ratio of the turbines made the offset weight not as effective as it was with the Griffon powered Buds from the early 80s.

Note to Lennard:

Nothing is irrelevant when building and setting up a boat. Two boats could be built from the exact same kit, one could run great while the other could be a dog. All it would take is some rounded edges or an extra ounce or two of epoxy in one to make the difference.

 

[Lennard Cuenco]

Sam, I don't think, when dealing with a scale boat, 1/4" is going to make a difference. That said, the further from center you go, the more it's going to affect the handling as it's going to want to turn toward the side furthest from the prop. Just a guess but I'm thinking that could be part of the reason the boats went back to a centered cockpit and engine bay, the reduced weight and higher power to weight ratio of the turbines made the offset weight not as effective as it was with the Griffon powered Buds from the early 80s.

Note to Lennard:

Nothing is irrelevant when building and setting up a boat. Two boats could be built from the exact same kit, one could run great while the other could be a dog. All it would take is some rounded edges or an extra ounce or two of epoxy in one to make the difference.

note to mark

how many boats have you built/run/tested?

go test something (ANYTHING ffs) and report back when you have evidence please

moved strut around on my 91 spirit..and im sharing what happened

 

[Glenn 787]

Agreed, Id give more credibility to built and tested. Get something on the water and report your results. Things you tried that worked and didnt.

In all the years Ive tuned in to see whats going on in the WA scale scene Ive yet to see your name. With all this knowledge you shouldve been out there mixing it by now. Time to stop with the excuses why you havent. Go have some fun and show your stuff.

 

[Samuel Hagan JR]

I've ran Center and 1/4" offset from center and really couldn't tell a difference. Only difference I've seen is the angle the strut pointed towards the left Sponson about 1 degree.

beyond certain weight, it becomes irrelevant

True. after the ones I've built and ran I just find it easier to do center line of hull. My new Scale

Is gonna be center line of hull. Waiting on cowling for motor position.

 

[Samuel Hagan JR]

Tom your building the Madison right. The pictures of the hull don't look offset.

 

[Hydro Junkie]

I take it you guys have never seen the toy grade boats that use twin props and no rudder to turn? Shut off one prop and the boat turns to that side, something called asymmetrical thrust. This is well known in the science world.

Lennard, I don't give you any credence either, considering how much help you asked from me when you were building your American Spirit, that is before I learned you were playing "HE SAID SHE SAID" and quit helping you

 

[tom galdys]

Sam, I'm using the Newton Plans and I ordered the framing kit from MLboatworks. Both are offset.

 

[Hydro Junkie]

Both are offset but the plans don't say anything about where the prop has to go, just where the hull and engine bay centerlines are. I did a lot of research on the Madison when I started working on one many years back. IIRC, the engine bay and cockpit are offset but the strut and prop are right on the centerline. I'll have to do some looking tomorrow and see if I can find my measurements I took off the full sized boat

 

[tom galdys]

Thank you Mark

 

[bob miller]

tom , what motor do you plan on using ? is any one else from our group of regulars building a 1/8 scale boat ? ....bob

 

[Samuel Hagan JR]

I'm building one of ML Extreme 1/8th kits the Elam but I keep it off here so I dont have to read critiques from people that don't build or race boats. It's a very nice kit.

 

[Matt Schofield]

tom , what motor do you plan on using ? is any one else from our group of regulars building a 1/8 scale boat ? ....bob

Bob there are currently 5 scales in the Rochester club. We will be doing monthly club races this year where hopefully all 5 will be racing. I know 4 for sure will be every month. Come on out!
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