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Old 26 November 2014, 17:21   #1
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What air pressure

Hi guys
Have a ply floored Achilles 12ft. Any guesses what is approximate air pressure for tubes and the air keel please.
Also what model bravo pump would do the job ,boat sits on trailer so only requires top ups. Nearly prefer a stirrup type rather than electric, so what model is beefy enough.
Ta
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Old 26 November 2014, 17:37   #2
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Quote:
Originally Posted by tuskar View Post
Hi guys
Have a ply floored Achilles 12ft. Any guesses what is approximate air pressure for tubes and the air keel please.
Also what model bravo pump would do the job ,boat sits on trailer so only requires top ups. Nearly prefer a stirrup type rather than electric, so what model is beefy enough.
Ta
Hi

Not sure but on a Honwave it says the presure needed on transom plate if this is any help.
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Old 26 November 2014, 17:41   #3
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no good no plate . Thanks anyway bud
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Old 26 November 2014, 17:51   #4
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I'm going to give you the pressures used on my Quicksilver Airdeck - no idea if they translate into safe pressures for your Achilles.

Tubes - 3.6 PSI (ono)
Keel - 6.4 PSI (ono)

You need a Quicksilver air pump c/w pressure gauge:

QUICKSILVER DOUBLE ACTION PUMP FOR DINGHYS INFLATABLES | eBay
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Old 26 November 2014, 18:07   #5
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To confuse matters further, on a Zodiac MKIIC (12' 6"), the tubes were 240 Mbar, and the inflatable keel was 220 Mbar.
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Old 27 November 2014, 03:50   #6
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Temperature is the key factor.
This is a cold, rainy morning, the pressure in my RIB's tubes are nearly zero. Should there be a bit of sunshine this afternoon, the tubes will be hard as a brick.
Approx. 240 Mbar is a good value for any boat when it is in use, on the trailer in November it should be much less.
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Old 27 November 2014, 04:18   #7
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Many years ago before there were electric pumps for boats and for that matter I don't remember pressure gauges being available, it was done by feel. For years I ran a few sibs with no idea what the pressure was in the tubes or keel. Now we have those all important pieces of equipment, we use them to the letter.
I would be less worried if the engine was small and go by feel until you have found the correct information but be careful if you have a meaty outboard.

Phil
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Old 27 November 2014, 09:03   #8
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Thanks folks. Found the foot bellows type pump could never really get up to pressure and sometimes had to loan a friends hand type to achieve enough pressure otherwise boat sort of caterpillars on the water. will try the quicksilver pump. Thanks
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Old 27 November 2014, 14:20   #9
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Maybe this would help? Newer models, but I don't think they've changed substantially over the years...

http://www.achillesinflatables.com/p...s_manual_1.pdf



Note: If the direct download link doesn't work, go to
Achilles Inflatable Crafts
and select Downloads at the top, Achilles Boat Owners Manuals on the left, then the Download button on the right.

jky
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