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30-05-2011, 02:04 PM
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#521
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BananaShark Member
Country: UK
Location: Salcombe South Devon
Occupation: Racer and builder
Interests: Winning races
Boat name: BananaShark
Boat make: BananaShark 34' Race
Engines: Twin Yanmar BY 260's
Join Date: Mar 2004
Location: Salcombe South Devon
Posts: 4,638
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[QUOTE=peterunwin;203786]
Quote:
Originally Posted by OCRDA
Surely 2 pumps are just going to work against each other and blow fluid out !![/QUOTE
Two or more pumps can be used very successfully provided a few simple rules are followed:
1. All pumps must be fed from a common reservoir.
2. If the pumps have integral reservoirs these should be removed and a hose fitted between the common reservoir and the pump.
3. Check valves to be fitted on the pressure side of each pump.
Then you will have a system that will operate with one engine or as many engines as you have in a multi installation and there will be no fighting between any of the pumps whether they are running or not.
Peter]
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I'm sure it will all get sorted out this week and be running fine - I had bought the Hypro stuff a while ago but if I was doing it again I would defintely have spoken to Peter first!
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__________________
Cookee
British Champions! RIB Formula 1 2005
National Speed Record Holder at 90.15 (still)
www.bananasharkracing.com
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31-05-2011, 10:00 PM
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#522
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Registered User
Join Date: Jun 2007
Posts: 90
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Quote:
Originally Posted by Cookee
Well we got it running in time to get to Torquay for Sunday lunchtime despite a couple of major time wasters. It turned out that Mr Yanmar Friday afternoon bloke had put two wires on the ignition barrel the wrong way round resulting in much head scratching to find that one! The biggest problem was the power steering though - We have Hypro Marine's HM1820 running off both the pumps and it just blows the fluid out of the caps on the pumps, so with no steering we couldn't even get it on the water to test it.
More photos to follow on Tuesday of the interior, lots of room in the cockpit with good visibility, the screens went in perfectly and fit totally flush to the canopy.
Richard Mason dropped by on Sunday afternoon and it was really good to see him although he still has a bit of a limp he's back at work now.
As soon as the steering is fixed we will be out testing complete with Gopro and a camera which will hopefully be later this week as soon as the steering is sorted.
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What are the pressure and flow volume of these two pumps? Also, what is the oil reservoir capacity and volume level?
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01-06-2011, 08:29 AM
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#523
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BananaShark Member
Country: UK
Location: Salcombe South Devon
Occupation: Racer and builder
Interests: Winning races
Boat name: BananaShark
Boat make: BananaShark 34' Race
Engines: Twin Yanmar BY 260's
Join Date: Mar 2004
Location: Salcombe South Devon
Posts: 4,638
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Quote:
Originally Posted by Boatless-Again
What are the pressure and flow volume of these two pumps? Also, what is the oil reservoir capacity and volume level?
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They are standard Yanmar pumps for the BY260 - I don't have that information I'm afraid. We may be simplifying the whole system down to one pump with the other pump in a loop with a cooler if this plan doesn't work - we'll see!
__________________
Cookee
British Champions! RIB Formula 1 2005
National Speed Record Holder at 90.15 (still)
www.bananasharkracing.com
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01-06-2011, 08:38 AM
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#524
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BananaShark Member
Country: UK
Location: Salcombe South Devon
Occupation: Racer and builder
Interests: Winning races
Boat name: BananaShark
Boat make: BananaShark 34' Race
Engines: Twin Yanmar BY 260's
Join Date: Mar 2004
Location: Salcombe South Devon
Posts: 4,638
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Some photos to bring us up to date:
Engine bay ready for the motors and the shelf is for the water strainers -
Two 250 litre fuel tanks - at least three hours range at WOT -
Brand new and shiny Yanmar BY260's 54 litres per hour each at WOT -
The Arnesons - the extension for the transom is still being made - that will be done soon!
Throttlemans position - electronics are on the way this week!
Plenty of room in the cockpit
Drivers seat with pony bottle built in -
__________________
Cookee
British Champions! RIB Formula 1 2005
National Speed Record Holder at 90.15 (still)
www.bananasharkracing.com
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01-06-2011, 11:33 AM
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#525
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Registered User
Country: uk
Location: salcombe
Occupation: semi retired
Interests: racing(middle east class 3 6l)
Boat name: still no worries
Boat make: phantom18
Engines: 2.5 efi
Cruising area: salcombe
Join Date: Dec 2007
Location: salcombe
Posts: 499
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longer than you think.
i think it's 4.629 hours at wot ! (your figures)
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01-06-2011, 11:52 AM
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#526
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Registered User
Location: devon
Join Date: Mar 2004
Location: devon
Posts: 556
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Hope so, that's about 0.1something L/M cooool
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https://www.boatmad.com/fun/scrapheap.wmv
THE SHERIFF IS A................................................. .................................................. .................................................. ....soundman
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01-06-2011, 12:07 PM
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#527
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Registered User
Country: uk
Location: salcombe
Occupation: semi retired
Interests: racing(middle east class 3 6l)
Boat name: still no worries
Boat make: phantom18
Engines: 2.5 efi
Cruising area: salcombe
Join Date: Dec 2007
Location: salcombe
Posts: 499
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54 / 60 = 0.9 l/m not 0.1 sorry
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01-06-2011, 01:37 PM
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#528
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BananaShark Member
Country: UK
Location: Salcombe South Devon
Occupation: Racer and builder
Interests: Winning races
Boat name: BananaShark
Boat make: BananaShark 34' Race
Engines: Twin Yanmar BY 260's
Join Date: Mar 2004
Location: Salcombe South Devon
Posts: 4,638
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54 lph each = 108 lph 500 litres / 108 = 4 hours 37 minutes @ 70mph = 323 miles
500 litres / 323 miles = 1.54 litres per mile
__________________
Cookee
British Champions! RIB Formula 1 2005
National Speed Record Holder at 90.15 (still)
www.bananasharkracing.com
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01-06-2011, 01:41 PM
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#529
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Registered User
Country: uk
Location: salcombe
Occupation: semi retired
Interests: racing(middle east class 3 6l)
Boat name: still no worries
Boat make: phantom18
Engines: 2.5 efi
Cruising area: salcombe
Join Date: Dec 2007
Location: salcombe
Posts: 499
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assuming it's 70 and not 40
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01-06-2011, 01:43 PM
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#530
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BananaShark Member
Country: UK
Location: Salcombe South Devon
Occupation: Racer and builder
Interests: Winning races
Boat name: BananaShark
Boat make: BananaShark 34' Race
Engines: Twin Yanmar BY 260's
Join Date: Mar 2004
Location: Salcombe South Devon
Posts: 4,638
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Quote:
Originally Posted by still no worries
assuming it's 70 and not 40
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Haven't you got ice creams to sell? Actually aren't you on standby for twins - no drinking for you at the wedding this weekend!
__________________
Cookee
British Champions! RIB Formula 1 2005
National Speed Record Holder at 90.15 (still)
www.bananasharkracing.com
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01-06-2011, 01:49 PM
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#531
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Registered User
Country: uk
Location: salcombe
Occupation: semi retired
Interests: racing(middle east class 3 6l)
Boat name: still no worries
Boat make: phantom18
Engines: 2.5 efi
Cruising area: salcombe
Join Date: Dec 2007
Location: salcombe
Posts: 499
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yes selling lot's but still got time to wind you up on this inter thingy
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01-06-2011, 01:49 PM
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#532
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Registered User
Location: devon
Join Date: Mar 2004
Location: devon
Posts: 556
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Quote:
Originally Posted by kitten
Hope so, that's about 0.1something L/M cooool
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I was confused
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https://www.boatmad.com/fun/scrapheap.wmv
THE SHERIFF IS A................................................. .................................................. .................................................. ....soundman
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01-06-2011, 08:55 PM
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#533
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Registered User
Join Date: Jun 2007
Posts: 90
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Quote:
Originally Posted by Cookee
They are standard Yanmar pumps for the BY260 - I don't have that information I'm afraid. We may be simplifying the whole system down to one pump with the other pump in a loop with a cooler if this plan doesn't work - we'll see!
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Check the flow rates and the reservoir capacity. Note the turn over ratio. Example: Two pumps, 4 gpm flow, oil reservoir with 1 gallon capacity. The fluid turn over is eight times per minute so the reservoir has to be able to fully fill and deplete itself eight times per minute.
You will need a vent on the reservoir that can enable this to happen and at the same time try to de-air the fluid before it goes back to the pumps again which is every 7.5 seconds.
A balance point of "oil reservoir" to oil volume will have to be met so as the incoming oil does not get blown back out the vent when the tank "breathes" and thus puke to your bilge. To much volume in the tank will force the oil to puke out of the reservoir vent, to little and the system will starve and the steering will become aireated.
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02-06-2011, 07:47 AM
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#534
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BananaShark Member
Country: UK
Location: Salcombe South Devon
Occupation: Racer and builder
Interests: Winning races
Boat name: BananaShark
Boat make: BananaShark 34' Race
Engines: Twin Yanmar BY 260's
Join Date: Mar 2004
Location: Salcombe South Devon
Posts: 4,638
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Quote:
Originally Posted by Boatless-Again
Check the flow rates and the reservoir capacity. Note the turn over ratio. Example: Two pumps, 4 gpm flow, oil reservoir with 1 gallon capacity. The fluid turn over is eight times per minute so the reservoir has to be able to fully fill and deplete itself eight times per minute.
You will need a vent on the reservoir that can enable this to happen and at the same time try to de-air the fluid before it goes back to the pumps again which is every 7.5 seconds.
A balance point of "oil reservoir" to oil volume will have to be met so as the incoming oil does not get blown back out the vent when the tank "breathes" and thus puke to your bilge. To much volume in the tank will force the oil to puke out of the reservoir vent, to little and the system will starve and the steering will become aireated.
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Thanks for that - we have now simplified the system temporarily so that we can test the boat and it's working with one pump, the helm and a bit of plumbing on the transom.
__________________
Cookee
British Champions! RIB Formula 1 2005
National Speed Record Holder at 90.15 (still)
www.bananasharkracing.com
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02-06-2011, 07:55 AM
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#535
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Registered User
Country: Job Centre
Location: In a box
Occupation: Chaos's gofer
Interests: Skiving
Boat make: Spectre 30
Engines: 2 x Promax 225
Cruising area: In the bath
Join Date: Mar 2004
Location: In a box
Posts: 5,201
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Quote:
Originally Posted by Cookee
Thanks for that - we have now simplified the system temporarily so that we can test the boat and it's working with one pump, the helm and a bit of plumbing on the transom.
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__________________
Chaos for Moderator.
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02-06-2011, 08:14 AM
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#536
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BananaShark Member
Country: UK
Location: Salcombe South Devon
Occupation: Racer and builder
Interests: Winning races
Boat name: BananaShark
Boat make: BananaShark 34' Race
Engines: Twin Yanmar BY 260's
Join Date: Mar 2004
Location: Salcombe South Devon
Posts: 4,638
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Quote:
Originally Posted by Tony Davis
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And thank you for your help Tony!
__________________
Cookee
British Champions! RIB Formula 1 2005
National Speed Record Holder at 90.15 (still)
www.bananasharkracing.com
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02-06-2011, 07:48 PM
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#537
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Senior Member
Country: UK
Boat name: Grip-O.co.uk
Engines: Steyr-Motors
Join Date: Jun 2005
Posts: 235
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high exhaust
How do you stop water flow going back into the engine with the high exhaust outlets?
And will you be ready for the Poole race?
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02-06-2011, 08:21 PM
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#538
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Registered User
Location: devon
Join Date: Mar 2004
Location: devon
Posts: 556
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At the moment port engine has a loop, and stbd you have to turn off the raw water and let the exhaust clear before stopping it. We are moulding the rear platform (bustle apparently) at the moment and then there will be drained loops both sides.
Yes provided we have no major issues tomorrow and measuring goes ok.
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THE SHERIFF IS A................................................. .................................................. .................................................. ....soundman
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03-06-2011, 11:09 PM
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#539
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timtap
Country: England
Location: Paignton Devon
Occupation: Ex Marine Engineer , Licencee
Interests: Photography, Real Ale .
Boat name: Shooters Too
Boat make: Scarab 22SC
Engines: Mercruiser 270hp
Cruising area: South West
Join Date: Jun 2008
Location: Paignton Devon
Posts: 333
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ʎɐqǝ uo pɹɐoqʎǝʞ ɐ ʎnq ı ǝɯıʇ ʇsɐן ǝɥʇ sı sıɥʇ.
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03-06-2011, 11:13 PM
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#540
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Registered User
Country: gibraltar
Location: gibraltar
Occupation: Shop Proprietor
Interests: ocr,sleeping
Boat name: The Rock
Boat make: Phantom 19XL
Engines: Yamaha 130B
Join Date: Mar 2006
Location: gibraltar
Posts: 331
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Quote:
Originally Posted by timtap
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Great job to all involved , nice boat ,wish em all the best of luck .
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