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Old 27 July 2012, 20:01   #11
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Originally Posted by RocketDane
It's certainly not my area of expertise, but be wary of pac22s with jets. I am sure a knowledgeable person once told me that the earliest ones were retro fits on the standard hull and it handled very badly. Halmatic eventually engineered a modified hull (possibly the 24?) that overcame this. Of course I might be misrepresenting the situation, but I'd certainly be doing more investigating for a jet.
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Old 08 August 2012, 02:14   #12
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FRC PR30 Rescue Boat

OK, we have given up on the Pacific with Jet Drive and are currently thinking about an Osprey Falcon.

I have applied for money at several foundations and while I wait for the replies I have searched for more boats and stumbled over this FRC:
FRC til salg
It is a daughter ship of the Standby vessel Putford Sky
PUTFORD SKY - Vessel's Details and Current Position - 6607393 - 232003337
that has been scrapped.

The seller wants 30.000 GBP for it which almost puts it out of our economic range. On the other hand it is probably very safe? But on these pictures:
Putford Sky - IMO 6607393 - Callsign GWMA - ShipSpotting.com - Ship Photos and Ship Tracker
Putford Sky - IMO 6607393 - Callsign GWMA - ShipSpotting.com - Ship Photos and Ship Tracker
it seems to be low in the water and I don't feel like going out into the North Sea in it. What do you think?

I cannot find anything on the net about this boat or its builder.

best
Jeppe Locht
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Old 08 August 2012, 03:08   #13
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I thing you should look into what you can launch off a beach without a tractor first before even looking at boats.
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Originally Posted by Zippy
When a boat looks that good who needs tubes!!!
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Old 08 August 2012, 03:15   #14
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engine with lots of power would be nice and - launch it directly from the beach. [/url]
It's a good looking and very Rugged boat, but I don't think you'll be launching it from a beach, and it will be VERY slow with 2 x 90HP.

Remember they will give you the equivalent power of @ a single 110HP, which on a boat of that size and weight may even struggle to plane with a few people on board.

Nasher.
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Old 08 August 2012, 04:35   #15
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It's a good looking and very Rugged boat, but I don't think you'll be launching it from a beach, and it will be VERY slow with 2 x 90HP.

Remember they will give you the equivalent power of @ a single 110HP, which on a boat of that size and weight may even struggle to plane with a few people on board.

Nasher.
I just got the specs from the seller. The boat was made by Watercraft International and they claim a speed of 28 knots light. I enclosed the specs FYI.

I like to have two engines for safety. Will a twin configuration really cost that much of the power?

best
j.
Attached Files
File Type: pdf FRC type PR 30.pdf (349.4 KB, 348 views)
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Old 08 August 2012, 05:08   #16
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General opinion is that twins give equivalent 'performance' of a single of 60% of the total HP

ie twin 90hp = 180HP x 60%
or 108HP.

The last 1/4 throttle opening on outboards is where all the fuel is used. So 28knots flat out with twin outboards will use a lot of fuel for the performance, but will of course give greater safety.

For your use it's probably a good set up, as long as nobody wants to take it cruising as well.

Nasher
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Old 08 August 2012, 05:11   #17
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Looking at some of the pictures of the rocket I found via Google, you are doing some very impressive stuff!
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Old 08 August 2012, 05:21   #18
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Looking at some of the pictures of the rocket I found via Google, you are doing some very impressive stuff!
Thank you :-)

Our site is here: Danish Space Challenge | Facebook and you do not have to be a FB-member to look.

j.
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Old 08 August 2012, 05:57   #19
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Quote:
Originally Posted by Nasher View Post
General opinion is that twins give equivalent 'performance' of a single of 60% of the total HP

ie twin 90hp = 180HP x 60%
or 108HP.

The last 1/4 throttle opening on outboards is where all the fuel is used. So 28knots flat out with twin outboards will use a lot of fuel for the performance, but will of course give greater safety.

For your use it's probably a good set up, as long as nobody wants to take it cruising as well.

Nasher
I see your point. Hmmm. An inboard 200-250 HP diesel would be nice for this boat.
j.
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Old 08 August 2012, 06:14   #20
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Nasher has got his theory mixed up. The theory is that you "lose" about 50-60% of the SECOND engine's HP, not them both. It doesn't always work out quite as simple as that, but it's a good starting point.

He's quite right though when he says that the FRC will be horribly underpowered with twin 90s. It needs at least twin 150s to be any way useful, and even then, it's no rocketship.
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