Author Topic: Been building an airboat  (Read 2566 times)

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Offline FinsnFur

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Re: Been building an airboat
« Reply #20 on: June 24, 2018, 10:11:57 PM »
She's on the phone while demonstrating the trim mechanism :alscalls:
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Offline Coyotes-R-Us

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Re: Been building an airboat
« Reply #21 on: July 13, 2018, 06:08:25 PM »
 :innocentwhistle:Working on the accelerator. On a VW motor single carburetor the butterfly leavers need about 3" of movement.
 I'm trying to use the thumb leaver off the snowmobile or maybe the brake lever but they only give me about an inch
 of movement. I have tried serval "Bell crank" set ups with out any luck.
 Finally, I think I'm on the right track. It's a leaver and pully set up to Pull from the back of the butterfly linkage.
 If I use the long part of the leaver to actuate the butterfly and WAY down near the bottom for the thumb leaver cable.
 I Think I will need to use the hand brake leaver to get enough leverage to open it with only one hand.
 Now I have to think of a way to mount the cable to the motor somehow/ somewhere .
 It's been a few weeks of trial and error . I need to get past this and start the trailer.
old is the new young

Offline Coyotes-R-Us

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Re: Been building an airboat
« Reply #22 on: July 28, 2018, 11:08:52 AM »
old is the new young

Offline nastygunz

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Re: Been building an airboat
« Reply #23 on: July 28, 2018, 02:27:58 PM »
Saweeeet!👍👍👍👍👍

Offline Todd Rahm

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Re: Been building an airboat
« Reply #24 on: July 29, 2018, 07:07:19 AM »
It floats, that's a positive sign.  :biggrin:

Offline Okanagan

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Re: Been building an airboat
« Reply #25 on: July 31, 2018, 09:32:46 AM »
Niice!  Wish I had that airboat for fishing salmon on the Fraser River.

Running the river is like boating on a chocolate milkshake that is anywhere from two inches to 100 feet deep with no way to tell which.  Gravel bars, rock ledges, giant sunken stumps and logs.  The guide boats all run jet drives. 


Offline Coyotes-R-Us

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Re: Been building an airboat
« Reply #26 on: July 31, 2018, 10:26:19 AM »
We have a jet drive too 18', but I hope to use this one on thin ice too...
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Offline Coyotes-R-Us

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Re: Been building an airboat
« Reply #27 on: November 23, 2019, 04:28:16 PM »
Another up date:

Water test
To bad the wind was 50 mph and cool we would have made some
adjustments on the river bank.
The movement of the motor and other weight back helped a bunch.
I still can move the motor but a lot of effort.
I was going to move it a foot then chickened out and went with 6".
Could have gone 8".
I'm going to lift the prop end another inch I went with 2 the first time.
We had troubles with the 64" prop hitting water as it splashes in the back, It eroded the prop some in a 15 minute test. I could get 3900 rpm with the new gears that puts me around 2500 rpm on the prop.
We put the 3 blade 59" prop on with the steepest pitch blocks I can get. 4600 motor rpm that's 2900 rpm on the prop.
Max for the prop is 3100 And I don't want to run that many rpm if I don't have to. I'll try a different sprocket I have. I can back off to 1.3 instead of 1.6 ratio. If I can get 3700 on the motor that's 2850 on the prop. About the same and 800 rpm less on the motor.
Here is the test vid.
https://www.youtube.com/watch?v=8M0729cm8_A&feature=youtu.be

https://www.youtube.com/watch?v=4rFGNgWk2Fs&feature=youtu.be

old is the new young

Offline FinsnFur

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Re: Been building an airboat
« Reply #28 on: November 24, 2019, 09:17:31 AM »
Looks like fun :eyebrow:
Is she heavy? Looks like it's plowing a lot of water.
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Offline Coyotes-R-Us

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Re: Been building an airboat
« Reply #29 on: November 24, 2019, 01:49:36 PM »
It is heavy.
I have some plans to get the nose up.
old is the new young