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Old 11 September 2006, 08:38   #11
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Even better why not fill the tubes with nitrous oxide? You would get a hell of a perfomance boost - trouble is your tubes would go down the faster you went!!!
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Old 11 September 2006, 11:20   #12
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Quote:
Originally Posted by Polwart
I just did a back of envelope calculation:

25 cm radius tubes, 6 m long on each side of a boat is about 2,350,000 cm3 of gas.

With air - this weighs roughly three and a half kilos. Helium therefore can save you no more than 3 kg! Even if you could keep it in your tubes.
OK so the whole idea was silly but if I hadn't asked I would never have known the answer

Pete7, less pies for me, correctly noted - I am a fat barsteward

I'll get to 40kt yet

Next question is whether or not if I bounce up and down on the jockey seat, whether the intermittent weight saving of [something over 100kg actual figure strictly classified] would get that last knot
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Old 11 September 2006, 11:52   #13
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Quote:
Originally Posted by BogMonster
Next question is whether or not if I bounce up and down on the jockey seat, whether the intermittent weight saving of [something over 100kg actual figure strictly classified] would get that last knot
It worked when I was a kid on a skateboard
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Old 11 September 2006, 15:26   #14
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Originally Posted by Nos4r2
It worked when I was a kid on a skateboard
Cool. The other thing I could try (just occurred to me) is get to max speed and then jump over the stern with the kill cord attached to me using 400 yards of nylon twine, hopefully the weight loss would allow a speed increase, when it got to the end of the twine the engine would stop and I could then swim back to the boat and check the maximum speed on the GPS. Though on re-reading that idea and considering the current sea temperatures here, I think maybe I am getting too obsessed with 40kt
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Old 12 September 2006, 03:19   #15
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Stephen;

I think you need to get hold of a couple of JATO bottles*.

Bolt 'em up to your radar arch, run up to WOT and light em off. You'd probably get a *lot* more than 40 kts.

jky


JATO = Jet Assisted Take Off; essentially a couple of solid fuel rockets which were attached to a plane, and lit to generate extra thrust for a short run takeoff or a high climbout rate, or both. Current examples can be seen by Fat Albert (the Blue Angel's support C-130 Hercules), who uses them at select airshows.
http://www.blueangels.com/fatalbertairlines.shtml
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Old 12 September 2006, 05:40   #16
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Stephen;

I think you need to get hold of a couple of JATO bottles*.

Bolt 'em up to your radar arch, run up to WOT and light em off. You'd probably get a *lot* more than 40 kts.

jky
Yeah I've seen the Darwin award (where the guy fitted them to his car) too and you don't get rid of me that easily

Here for anybody who doesn't know what I am talking about...
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