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Old 13-07-2017, 23:51   #1
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Help with getting my monohull onto its hydrafoil

Hey guys, I just got a jeanneau 44i and I'm having trouble getting it up on its hydrafoil like the Americas Cup yachts. I've had a spin cycle bike rigged up to the propshaft to give it a bit of a boost but I run out out of gas before getting it up there.
Any advise would be much appreciated as I'm training for selection for the next 1
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Old 13-07-2017, 23:57   #2
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Re: Help with getting my monohull onto its hydrafoil

Bolt an SRB onto each stern quarter. You'll get up & foiling & then some! A JATO package would probably do the trick too.


SRB = Solid Rocket Booster as in from the Space Shuttle
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Old 14-07-2017, 05:39   #3
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Re: Help with getting my monohull onto its hydrafoil

You are obviously lacking in the sail department, I am not sure where you get those fancy articulating solid wings though....
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Old 14-07-2017, 06:38   #4
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pirate Re: Help with getting my monohull onto its hydrafoil

Quote:
Originally Posted by Greig View Post
Hey guys, I just got a jeanneau 44i and I'm having trouble getting it up on its hydrafoil like the Americas Cup yachts. I've had a spin cycle bike rigged up to the propshaft to give it a bit of a boost but I run out out of gas before getting it up there.
Any advise would be much appreciated as I'm training for selection for the next 1
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Old 14-07-2017, 06:47   #5
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Re: Help with getting my monohull onto its hydrafoil

From reading your post...the only thing I could suggest is getting in a bit more shape...your principle sounds right. It's just that you are running out of steam before she gets on plane..
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Old 14-07-2017, 09:12   #6
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Re: Help with getting my monohull onto its hydrafoil

2 words:


Phase Inhibitor......
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Old 14-07-2017, 10:05   #7
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Re: Help with getting my monohull onto its hydrafoil

I agree with Uncivilized. In the late 70's my cousin was crew chief on the Miss Budweiser rocket car that they attempted to break the speed od sound with. After several unsuccessful runs at daybreak at Edwards Airforce Base over the course of a few months they strapped a Sidewinder missile, sans warhead I assume, to the top and the driver who was a stuntman named Stan? Set it off when he reached like 550 mph. They hit mach I going one way, but to get the record you have to turn around and go the other way the same day, and they couldn't do it. The payload of a 44 foot monhull is considerable, and the friction of water is a lot more than air, so I think something closer to a V-2 or a Saturn rocket is in order. Also mach I is lower at lower temperatures, and is why they launched the rocket car at dawn on the dry lake bed. So I think to get up on a plane a polar location is in order, sort of like WC Fields yacht " The Gigantic" in " The Great Radio Broadcast of 1938". I want to watch.
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Old 14-07-2017, 10:31   #8
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Re: Help with getting my monohull onto its hydrafoil

The foiling cruising trimaran I saw in Sausallto in 1969 had no rocket assist. It was a plywood amateur built and got up on ladder foils in a breeze. It was sailed from San Francisco bay to New Zealand and back. It is a common misconception that only carbon fiber wing sail boats are able to foil. And remember that Alexander Graham Bell built the first foiler in 1870. Not the current high tech times.
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Old 14-07-2017, 12:10   #9
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Re: Help with getting my monohull onto its hydrafoil

You were foiled in your attempt to foil? So you were foiled then. Or did you want the other type of foiled?
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Old 14-07-2017, 12:11   #10
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Re: Help with getting my monohull onto its hydrafoil

I believe you can but an upgrade kit from ACME.
I suggest you send an email to wylie.e.coyote@ludicrous.net for the part #s.
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Old 14-07-2017, 16:18   #11
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Thumbs up Re: Help with getting my monohull onto its hydrafoil

Foiled again?
But suggestions of enormous power and other absolutely impracticable ideas shows lack of lateral thinking. Clearly the answer is a large bundle of helium or hydrogen, if short of money, balloons. Attached to the mast head. Simple eh? Foiling at 6 knots!! Or downwind at wind speed.
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Old 14-07-2017, 16:38   #12
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Re: Help with getting my monohull onto its hydrafoil

In the middle of the last century the USA supplied McMurdo Base in Antarctica using DC3's with JATO from Taieri Airport southern New Zealand. Got up quick!
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Old 14-07-2017, 17:01   #13
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Re: Help with getting my monohull onto its hydrafoil

Quote:
Originally Posted by Greig View Post
Hey guys, I just got a jeanneau 44i and I'm having trouble getting it up on its hydrafoil like the Americas Cup yachts. I've had a spin cycle bike rigged up to the propshaft to give it a bit of a boost but I run out out of gas before getting it up there.
Any advise would be much appreciated as I'm training for selection for the next 1
Clearly an anchor problem. Need to upsize 50%, and add another 100M of chain.
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Old 14-07-2017, 17:14   #14
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Re: Help with getting my monohull onto its hydrafoil

More hamsters on treadmill. More caffeine. For you and hamsters.
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Old 14-07-2017, 17:24   #15
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Re: Help with getting my monohull onto its hydrafoil

What Foufou said... I remember reading a book years ago about some dude who foiled a plywood mono all around the South Pacific, back in the 50s from memory. Book had quite a few old black and white photo plates to prove it too. Quite an eye-opener for me, as I was playing with Windrider F16 Rave foil boat at the time (which would stand up tall and take off in around 10 knots of breeze) and also thought that high-tech tris were the only way to achieve this..
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