Air boat

bmazor · Dec 29, 2016

I would like to share my experience in tunnel hall airboat design. I already test this hall with outrunner motor and 10x6" prop. Now this 27" airboat equipped with EDF with 4 lb of trust. I'll test it in the water in Jan.

Jerry Dunlap · Dec 29, 2016

It will be interesting to see how it corners.

JD

Patrick Mulvany · Dec 30, 2016

Boris,

I have an old wooden Dumas tunnel with a .21 OPS turned upside down to lower center of gravity with a 10X7 wood prop. Haven't played with it for years but it is up on my shelf for conversation purposes?? It was pretty quick on dewey grass in a smooth open field but in the water it is just a bit to narrow to stay upright in any type of sharp turn. It was fun while the racing season was slow for sure if you are in the snow belt(Who isn't) your should go like a bandit on the snow!!!

Later!!

Pat

bmazor · Dec 30, 2016

Patrick Mulvany said:
Boris,

I have an old wooden Dumas tunnel with a .21 OPS turned upside down to lower center of gravity with a 10X7 wood prop. Haven't played with it for years but it is up on my shelf for conversation purposes?? It was pretty quick on dewey grass in a smooth open field but in the water it is just a bit to narrow to stay upright in any type of sharp turn. It was fun while the racing season was slow for sure if you are in the snow belt(Who isn't) your should go like a bandit on the snow!!!

Later!!

Pat

In January I'll post a video for the test drive. It is funny. Boris

https://drive.google.com/file/d/0B81CeY0x_Asqa2VDTVhKTWM4QzQ/view?usp=sharing

bmazor · Dec 30, 2016

bmazor said:
Patrick Mulvany said:

Boris,

I have an old wooden Dumas tunnel with a .21 OPS turned upside down to lower center of gravity with a 10X7 wood prop. Haven't played with it for years but it is up on my shelf for conversation purposes?? It was pretty quick on dewey grass in a smooth open field but in the water it is just a bit to narrow to stay upright in any type of sharp turn. It was fun while the racing season was slow for sure if you are in the snow belt(Who isn't) your should go like a bandit on the snow!!!

Later!!

Pat

Click to expand...

In January I'll post a video for the test drive. It is funny. Boris

My grandson make this video.https://drive.google.com/file/d/0B81CeY0x_Asqa2VDTVhKTWM4QzQ/view?usp=sharing

Jerry Dunlap · Dec 30, 2016

It corners just fine.

JD

bmazor · Dec 31, 2016

Jerry Dunlap said:
It corners just fine.

JD

But had trouble to go straight line! Maybe I have to add some turn fin to keep straight? Boris

Patrick Mulvany · Dec 31, 2016

I didn't realize from first pic that it was a ducted fan and you were turning the motor?? That's pretty cool! Mine is just top heavy with the prop cage and motor mount?? I would still throw it out on a field of level snow and make some tracks!

Later!!

Pat

Jerry Dunlap · Dec 31, 2016

bmazor said:
Jerry Dunlap said:

It corners just fine.

JD

Click to expand...

But had trouble to go straight line! Maybe I have to add some turn fin to keep straight? Boris

You might want to try 1/4" X1/4" spruce stringer glued to the bottom. Maybe one on the center line and a couple on each side.

JD

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