Zodiac FC470 Build

[whisper]

Originally Posted by willk

Whisper, there will be around 3000psi in that cylinder - be careful!

I'm using SCUBA cylinders to fill my SIB, so feel free to PM me if I can help.

Thanks dude, it was used to fill my air rifle, but sold the rifle and kept the cylinder, it's never been in the sea or even out in the rain.

But do they suffer from condensation on the inside?

[willk]

Originally Posted by whisper

But do they suffer from condensation on the inside?

If they are filled with less than 100% dry air, absolutely. They need to be inspected/tested according to your regs. 3000psi in a steel container is a bomb. If it pops, your roof is coming off, or your head if it's nearby. Remember that when lorry tyres pop at 100psi, people can be killed. Worth a check.

I use a SCUBA regulator and some Heath Robinson adapters to get down to the 11.5psi my airdeck needs.

[whisper]

Originally Posted by willk

If they are filled with less than 100% dry air, absolutely. They need to be inspected/tested according to your regs. 3000psi in a steel container is a bomb. If it pops, your roof is coming off, or your head if it's nearby. Remember that when lorry tyres pop at 100psi, people can be killed. Worth a check.

I use a SCUBA regulator and some Heath Robinson adapters to get down to the 11.5psi my airdeck needs.

Ok, I will remove it from under my bed and put it in the garage

[whisper]

Originally Posted by willk

I use a SCUBA regulator and some Heath Robinson adapters to get down to the 11.5psi my airdeck needs.

Did you use a pressure regulator or governor?

[willk]

Originally Posted by whisper

Did you use a pressure regulator or governor?

I suddenly see your problem. I use the Low Pressure feed from a SCUBA first stage regulator - they max out at around 13-14 PSI - you need 16? EDIT: This is not correct, those figures are for BAR, so LP or Intermediate pressure is around 150 PSI

The other supply is the High Pressure feed to the pressure gauge, it runs the full 3000psi but at low flow rates. Not sure how you'd tap into the HP feed! You won't have to...

[whisper]

Hummmm, the pressure gauge is on the outlet side of the main tap so thats the outlet pressure's sorted although there is no cut off for over pressurisation

I guess I was planning on tapping from the connection at the end of the hose and stepping up to the same size as the connection on the end of the foot pump (the internal diameter of the sib valve inlet on the keel). This is the same size inlet as on the other valves so it could be used in connection with the several emergency repair kits and clamseal.

The floor has the retaining straps for the cylinder to keep it from rolling around the boat.

I don't have to use it, it's just that I already have it and am used to decanting it into a 0.5L cylinder that I had on my rapid 7 air rifle.

[Peter_C]

Originally Posted by whisper

3L Dive Cylinder in a black case, I will need to sort out a way of connecting it to the valves so it can be used to bring the keel up to its required 16psi pressure and also there is a space on the deck where it straps in

I'm not planning at this stage to connect it via the co2 fittings on the tubes.

Are you planning on getting it filled with CO2 or just pressurized air?

Originally Posted by AJ.

As an FYI dive cylinders should be serviced every couple of years. They check the inside for corrosion. Due to the massive pressure in them I would recommend it

Here in the USA cylinders have to be hydro'ed every 5 years. Visual inspection is a yearly dive shop thing here to generate revenue. Aluminum cylinder that are never breathed don't really need to be kept spotless, and the aluminum also happens to not corrode very much, which is why they do work well in humid areas.

Aluminum tanks are dangerous and have killed many people with their shrapnel. Steel on the other hand tends to pop and not come apart.

Originally Posted by willk

I suddenly see your problem. I use the Low Pressure feed from a SCUBA first stage regulator - they max out at around 13-14 PSI - you need 16?

The other supply is the High Pressure feed to the pressure gauge, it runs the full 3000psi but at low flow rates. Not sure how you'd tap into the HP feed!

A normally tuned scuba regulator should have, what is known as intermediate pressure, set to around 130-140 pounds per square inch. Yes you could de-tune a reg severely, but all have what is known as IP creep which can vary by 10 psi.

Just watch it as you fill. I always fill my boat at home with my 125 psi compressor unregulated. No biggie, I just use a gauge. Once I have used most of a scuba tank I will often use it for topping up the boat if needed. Otherwise I find my hand pump keeps me from using valuable air that is better used underwater.

[willk]

Originally Posted by Peter_C

A normally tuned scuba regulator should have, what is known as intermediate pressure, set to around 130-140 pounds per square inch. Yes you could de-tune a reg severely, but all have what is known as IP creep which can vary by 10 psi.

Ach! BAR! Thanks Peter!

I wrote/thought PSI instead of BAR. PSI was history here by the time I started diving but is still in vogue for RIBs and car tyres (auto tires ). I often accidentally mix them up, luckily not in practice. Intermediate pressure side of the reg is generally set for 8-14 BAR, depending on the manufacturer. Poseidon used to be quite high 13ish, others like the old Apeks quite low. Divers tend to refer to the takeoffs from that side as LP feeds (for drysuits and BCD) as opposed to the HP feeds going to pressure gauges and computer sensors.

My bad. But the upshot is that whisper can easily fill his SIB with a SCUBA reg inflation system. Gonna edit that post in case someone goes pop!

[whisper]

I've just read in this document that the keel pressure is 16 psi +- 10% so I reckon that's 14.4psi to 17.6psi and the electric pumps go up to 14.5psi so is this problem solved???

http://zodiacmilpro.com/wp-content/u...or-Z802292.pdf

If I don't carry the air tank I could carry this holdall in its place that could also contain the battery box and other equipment.

At the risk of looking like Martini II Although I can't find a picture of it in use at the moment

ATV / QUAD SOFTBAG GEPÄCKTASCHE KOFFER TOPCASE QUADKOFFER STAUBOX BOX TRIKE NEU | eBay

[martini]

Copy cat!

Those ATV bags work quite well, I looked for one that had just the right dimensions so fits nicely across the transom.

Couple of downsides though:
The top swings up for access from behind the quad bike, wrong way for us.

Gets in the way a bit when you tilt the engine up

Sent from my portable speaking device using Rib.net

[whisper]

Sorry dude

I had my best offer accepted for about £65 inc p&p so it's on it's way. I think the lid folds up the right way on this one so I'll wait and see how it fits.

Regarding an air pump I have been told to go for either the bravo btp12m £119.99 or the btp12d £129.99 both inc p&p...

[PeterM]

Originally Posted by whisper

Regarding an air pump I have been told to go for either the bravo btp12m £119.99 or the btp12d £129.99 both inc p&p...

Is one battery and one plug in 12v with clips? I wish I'd gone built in battery..but then again I know the car will pump stuff (even if then the car won't start)

[Ian_st]

Is it worth trying it before you buy?

Also if not quite enough, 14.5psi by pump, last psi by hand

[martini]

Originally Posted by whisper

I think the lid folds up the right way on this one so I'll wait and see how it fits.

It does appear to in the piccy even though in every other aspect it looks identical to mine

[whisper]

Originally Posted by PeterM

Is one battery and one plug in 12v with clips? I wish I'd gone built in battery..but then again I know the car will pump stuff (even if then the car won't start)

Both don't come with a battery, but both do have a fan inside that blows air in until a certain pressure and then the compressor kicks in and finishes it off. the difference is one the analogue and the other is digital.

Originally Posted by Ian_st

Is it worth trying it before you buy?

Also if not quite enough, 14.5psi by pump, last psi by hand

The instuctions say the keel pressure should be 16psi +- 10% = 14.4 - 17.6

[whisper]

Originally Posted by martini

It does appear to in the piccy even though in every other aspect it looks identical to mine

Cool, loving the drink holders

[AJ.]

I have the analogue if you want to try it, this wkend?

[Squid Boat]

Originally Posted by whisper

Cool, loving the drink holders

OK.... subscribed.

Cheers, Squid

[Nick Hearne]

Whisper you brining this new toy on Sunday?

[whisper]

I don't think I'll be able to launch it without a trailer or the jumbo launch wheels....

Hummm, it would be good though