Thunderbird in storage for 33 years - Page 9

DAREDEVIL · 10-09-2010, 02:52 AM

Quote:

Originally Posted by Mike Bontoft

nice picture....

AND JON , i still think your boat would be good for KW in P-4.....max speed 85 MPH and since u have diesels they should actually pull pretty good at the green flag !!!!!

Would be cool !!!

Jon Fuller · 10-09-2010, 07:27 AM

But with our 6.4 litres of diesel power, we top out at 67mph. Somewhat off the pace.

DAREDEVIL · 10-09-2010, 10:00 AM

Quote:

Originally Posted by Jon Fuller

But with our 6.4 litres of diesel power, we top out at 67mph. Somewhat off the pace.

wow, i thought they be a little faster..cant u prop bigger ...well i guess then u wont get on plane...but remember u would only need fuel for ~ 50 miles.

Martin The Talker · 10-09-2010, 10:08 AM

Quote:

Originally Posted by DAREDEVIL

wow, i thought they be a little faster..cant u prop bigger ...well i guess then u wont get on plane...but remember u would only need fuel for ~ 50 miles.

50 Miles ??? - Thats shorter than 1.3 litre races !
Give the boats a decent run !
50 miles is an insult, unless I've mis-understood your post.

cfun · 10-09-2010, 10:29 AM

Hey it's 2am in the morning over your side of the pond DAREDEVIL your up late polishing ye boat and so you should be, Key West is fast approaching if ye want to show em how it's done

I think 67 is pretty good from a non stepped deep V 32' offshore boat, bet a set of petrol engines of the same hp would not shift the boat as fast though

Jon Fuller · 10-09-2010, 11:24 AM

Quote:

Originally Posted by DAREDEVIL

wow, i thought they be a little faster..cant u prop bigger ...

C'mon, tell me you understand the power/speed thing better than that. If everyone could go faster by just upping the pitch......well, things would be different eh. Our 2x 290hp with our hull, setup and given weight has a max possible top speed, we are already there.

cfun · 10-09-2010, 01:07 PM

Would I be right in thinking Cookee's new boat is also aimed at around 2x280-300hp diesel engines but on a slightly larger multi-stepped hull and one assumes will certainly be no lighter, so how much faster will the steps make it? or will the extra 2' cancel out any gain in the step department

Cookee · 10-09-2010, 01:31 PM

Quote:

Originally Posted by cfun

Would I be right in thinking Cookee's new boat is also aimed at around 2x280-300hp diesel engines but on a slightly larger multi-stepped hull and one assumes will certainly be no lighter, so how much faster will the steps make it? or will the extra 2' cancel out any gain in the step department

We are running (or will be when it hits the water) twin 260 Yanmars as opposed to the Steyrs in Swipes) with two main differences, firstly it is a stepped boat, and this one will be running surface drives, apart from less drag they are also more efficient due to having chain drives, our stated aim is 70mph, and if we achieve that we will be very happy indeed - time will tell!

In reality I hope to be able to compete with Nick and Jon in Swipes and even take on some of the boats in classes higher up, Swipes has shown it is possible, and with a bit of extra length it should help us in the rough?

DAREDEVIL · 10-09-2010, 05:31 PM

Quote:

Originally Posted by Jon Fuller

C'mon, tell me you understand the power/speed thing better than that. If everyone could go faster by just upping the pitch......well, things would be different eh. Our 2x 290hp with our hull, setup and given weight has a max possible top speed, we are already there.

290 HP...thats it ??? ok,,,i need to stop..lol
I thought u had more then that , sorry...that is impressive !!!!!

i mean the top speed on only that little HP .

My 30 sonic plessure boat from 1989 went that speed on twin 260 HP merc SB.

But like i said..i need to stop because i dont understand your theory in speed.

I like to go fast in an offshore boat ..and 60-70 MPH fast is a regular pleasure boat.

Not so much a raceboat.

Will Smith has a costumer ( US PHANTOM ) with twin small cummins diesels and it runs 74 MPH ...mmmhh PLEASSURE BOAT !!!!!

So if u can explain this theory to me how things work in racing over there ..i may understand this.

I am serious, no insult ment !!!! I would love to understand.

DAREDEVIL · 10-09-2010, 05:33 PM

Quote:

Originally Posted by cfun

Hey it's 2am in the morning over your side of the pond DAREDEVIL your up late polishing ye boat and so you should be, Key West is fast approaching if ye want to show em how it's done

I think 67 is pretty good from a non stepped deep V 32' offshore boat, bet a set of petrol engines of the same hp would not shift the boat as fast though

I think it was 3 am..lol and yes..still working on the boat TEAM deal...for KW and 2 other races....need funds, so no sleep here.....

seeking sponsors is a 24/7 job !!!! and not always easy .

I am not a rich kid that can go racing without outside support.

cfun · 10-09-2010, 06:44 PM

Quote:

Originally Posted by DAREDEVIL

290 HP...My 30 sonic plessure boat from 1989 went that speed on twin 260 HP merc SB.

Also you have to bare in mind the 30' Sonic would probably measure not much more than 26' with the way the UIM Endurance measurements work, so it would no doubt be quite a lot smaller than the British 32' Phantom

Quote:

Originally Posted by Cookee ... in reality I hope to be able to compete with Nick and Jon in Swipes and even take on some of the boats in classes higher up, Swipes has shown it is possible, and with a bit of extra length it should help us in the rough?

Will be really great when Swipes and the BananaShark 34' finally get together,

should be a close match

DAREDEVIL · 10-09-2010, 07:11 PM

Quote:

Originally Posted by cfun

Also you have to bare in mind the 30' Sonic would probably measure not much more than 26' with the way the UIM Endurance measurements work, so it would no doubt be quite a lot smaller than the British 32' Phantom

Will be really great when Swipes and the BananaShark 34' finally get together,

should be a close match

C fun, the 30 foot sonic messured 29.4 feet ( 8 m + 96 cm ) from bow to transom ( where the drives bolt on, not the swim platform. ) !!!!!!

ITS NOT A FOUNTAIN...lol

My Aero-tek, messures 31.4 from bow to transom and only has a single engine ....straight bottom...heavy #5 with transmission ,over 80MPH..cant tell u the real #...secret..LOL but fast !!!!!

dowdy · 10-09-2010, 07:25 PM

Quote:

Originally Posted by DAREDEVIL

C fun, the 30 foot sonic messured 29.4 feet ( 8 m + 96 cm ) from bow to transom ( where the drives bolt on, not the swim platform. ) !!!!!!

ITS NOT A FOUNTAIN...lol

My Aero-tek, messures 31.4 from bow to transom and only has a single engine ....straight bottom...heavy #5 with transmission ,over 80MPH..cant tell u the real #...secret..LOL but fast !!!!!

JUNGLE JUICE ADDITIVE IN THE TANK

DAREDEVIL · 10-09-2010, 07:44 PM

Quote:

Originally Posted by dowdy

JUNGLE JUICE ADDITIVE IN THE TANK

??????

dowdy · 10-09-2010, 08:06 PM

Quote:

Originally Posted by DAREDEVIL

??????

The REAL secret. If it aint an additive in your fuel mix,it must be the HAIR flow.

DAREDEVIL · 10-09-2010, 08:34 PM

Quote:

Originally Posted by dowdy

The REAL secret. If it aint an additive in your fuel mix,it must be the HAIR flow.

there is no secret, 598 CI, on pump gas ( 93 octane ) ..830 HP ..850+ FPT ..32 pitch 4 blade @ 5950 RPM, with a 1:68 gear ratio.
Boat weighs 5700 US pounds with 70 gallons of fuel.

The motor can handle a lot more prop then that so if i stick my 36 on there ...still at 5800 RPM u can figure out how fast she is .

Oh, slip is at 18% so take that off.....

here is how u do it : pitch ( 36 ) X RPM ( 5800 ) / ratio ( 1.68 ) / 1056 - 18% slip = 96.5 MPH !!!!

and most of the time these calculations are with in +/- 3 mph !!!!!

dowdy · 10-09-2010, 09:35 PM

Quote:

Originally Posted by DAREDEVIL

there is no secret, 598 CI, on pump gas ( 93 octane ) ..830 HP ..850+ FPT ..32 pitch 4 blade @ 5950 RPM, with a 1:68 gear ratio.
Boat weighs 5700 US pounds with 70 gallons of fuel.

The motor can handle a lot more prop then that so if i stick my 36 on there ...still at 5800 RPM u can figure out how fast she is .

Oh, slip is at 18% so take that off.....

here is how u do it : pitch ( 36 ) X RPM ( 5800 ) / ratio ( 1.68 ) / 1056 - 18% slip = 96.5 MPH !!!!

and most of the time these calculations are with in +/- 3 mph !!!!!

I was baffled by the square on the hippopotamus at school and x-z+y2 was always a no brainer for me ,always scowed off when maths was on ,i just fill it full of juice and put me foot down

DAREDEVIL · 11-09-2010, 05:34 AM

Quote:

Originally Posted by dowdy

I was baffled by the square on the hippopotamus at school and x-z+y2 was always a no brainer for me ,always scowed off when maths was on ,i just fill it full of juice and put me foot down

what is the square on the hippopotamus ???

Hey..if u are trying to play with me buddy..lol, i have no clue about math !!!

DUDE, i am blond !!!!!

So please stay on track here....its about boats !!!!!! LOL

and ok then, how fast is my boat with a 32 pitch prop ???
Or even better, what rpm and prop is Jon running if his boat tops out at 67 MPH ????? mmhhhhhh

dowdy · 11-09-2010, 07:20 AM

Quote:

Originally Posted by DAREDEVIL

what is the square on the hippopotamus ???

Hey..if u are trying to play with me buddy..lol, i have no clue about math !!!

DUDE, i am blond !!!!!

So please stay on track here....its about boats !!!!!! LOL

and ok then, how fast is my boat with a 32 pitch prop ???
Or even better, what rpm and prop is Jon running if his boat tops out at 67 MPH ????? mmhhhhhh

The square root on the hypotenuse is equal to the sum of the square of the other two sides,basic fundamental in geometry/trigonometry)helpful in old style navigation,before G.P.S.

Jon Fuller · 11-09-2010, 07:59 PM

Scott, we run the diesels at around 4200rpm (governor cuts in at 4300). we spin Merc Bravo1's @ 28" pitch via 1.5: merc XR Sportmasters. We see IRO 10-11% slip.

4200rpm divided by 1.5 = 2800 rpm @ the prop, x 28 pitch, divided by 1056 (magic number) = 74.24 less 10% slip = 66.81mph

math backs up the Gaffrig/GPS.

As I've said a couple of times, it's not a fast top speed boat, it wasn't built to be. but if you come over here with your boat, and we have a rough CTC, you might just find this slow old boat (and a few others) in front of you.

BTW, I just did the math on the figures you gave for your boat (5950rpm /1.68 gears /32pitch /18% slip and I make it 88mph, not 96

over here, for marathon class, we'd expect to see a boat like yours in D class, with something like a 500efi in it, or a 525, but with the CMI's removed (separate runner headers are not allowed in D) It wouldn't set the world alight top speed, but would be a good average speed boat. if you ran the engine you have, you'd have to run in C-sport and compete with something like the Buzzi 39 with twin 560hp, or possibly twin 600hp FPT diesels on trimax's. good luck with that if someone starts pushing hard in one of them, especially if it blows hard that day.....you'll eat his rooster for like 10 seconds, then you wont see him again till the prize giving.

There is a guy running one of these currently, but he doesn't seem to push it very hard in the rough, ..a crying shame.