Performance Boats Forum banner

1 - 14 of 14 Posts

·
Registered
Joined
·
418 Posts
Discussion Starter #1
It appears the sport of marathon jetboat racing is about to enter a new phase. A boat out of the US is likely to be the first ever turbine powered marathon boat to ever enter official competition.

"Burning Desire" is a 21 foot Eagle tunnel powered by a GE T-58 engine and it should be at the start line for the beginning of the 2008 US world jetboat marathon taking place in late May in Northern California and Southern Oregon

Im excited to see the results of this teams efforts as I have a turbine boat project in the works myself.

Here are a few sneak preview shots and I have spoken to the navigator and he says the boat accelerates like a bat out of hell!

Cheers
 

Attachments

·
Registered
Joined
·
418 Posts
Discussion Starter #3
initial water tests before much tuning was done and with the turbine turned down reportedly produced this upstream speed......

:))eek:))

 

·
Registered
Joined
·
419 Posts
Gotta luv that being the first time out!!!!!!
What im trying to find out is that motor twists 10K+ what is the source of reduction, what size impeller and anticipated long run planned Rs to get at efficient torque its producing in the planned race mode. The number is impressive as is Yet everything can be improved on and maybe someone has something that could be tried as a combo. The other problem is when you get these running 140+ #s what becomes the driver safety margins and what to do to attain that. I see this happening faster then maybe most to the unlimiteds in this Race Format. Anyway good luck- You gotta love engineering and its rewards.
 

·
Registered
Joined
·
418 Posts
Discussion Starter #7
Pops its my understanding they are overdriving the pump and spinning an A3 currently. I think that model of T-58 outputs at a much lower RPM than 10K
I honestly do not have much in terms of details and Im sure so far they dont either. I think the boat has only been run a few times. Lost to do before the big race but the Worlds Marathon should do a good job of telling what a setup like this is, or isn't, capable of. My interest in this is cost and longevity. I will be VERY surprised if this boat doesnt finish the 8 day race due to engine failure. Gearbox, pump, impeller etc maybe but not engine...

Time will tell its a hell of a wicked looking machine tho.

(FYI the T58 is about 1400 HP and weighs ~350 lbs)
 

·
Registered
Joined
·
628 Posts
Not the first

Sorry - but they are not the first to do the turbine/whitewater racing. The World Championship Marathon was held here in Idaho in the late 80's/early 90's, can't remember the exact year - but there were some guys from Mexico who brought up two fiberglass boats with turbines out of helicopters. One never ran and the other one was incredibly fast and handled quite well but really had difficulties on and off the throttle. The boat never ran after the first leg which was held on the lower Snake River.The reaction of the boat was real slow which made it very dangerous for them through the rapids. May not be as much of an issue now that the current races don't have much for rapids and technology has come around a little in twenty years. Hope these guys find success and run safe. Keep out of the rocks boys.


It appears the sport of marathon jetboat racing is about to enter a new phase. A boat out of the US is likely to be the first ever turbine powered marathon boat to ever enter official competition.

"Burning Desire" is a 21 foot Eagle tunnel powered by a GE T-58 engine and it should be at the start line for the beginning of the 2008 US world jetboat marathon taking place in late May in Northern California and Southern Oregon

Im excited to see the results of this teams efforts as I have a turbine boat project in the works myself.

Here are a few sneak preview shots and I have spoken to the navigator and he says the boat accelerates like a bat out of hell!

Cheers
 

·
Registered
Joined
·
418 Posts
Discussion Starter #9
Sorry - but they are not the first to do the turbine/whitewater racing. The World Championship Marathon was held here in Idaho in the late 80's/early 90's, can't remember the exact year - but there were some guys from Mexico who brought up two fiberglass boats with turbines out of helicopters. One never ran and the other one was incredibly fast and handled quite well but really had difficulties on and off the throttle. The boat never ran after the first leg which was held on the lower Snake River.The reaction of the boat was real slow which made it very dangerous for them through the rapids. May not be as much of an issue now that the current races don't have much for rapids and technology has come around a little in twenty years. Hope these guys find success and run safe. Keep out of the rocks boys.
Yes we'd heard about that boat but I was not under the impression it had run long enough, or actually finished any legs to consider it "in the race" so to speak
In any case yes I was told that boat used a single stage turbine which I could see would certainly cause the issues you mention. Most of the modern attempts at boats use engines with free turbine shafts to avoid that issue.

Cheers
 

·
Registered
Joined
·
628 Posts
You may very well be correct about not finishing any legs of the race. I can't recall whether they did or not. They did start that first leg and I don't think they made the second leg or any others during the week. It was crazy trying to run the legs, get home and work on the boat, try to get some rest then get back at it very early the next morning. I guess we could say they entered the race but never finished.


Yes we'd heard about that boat but I was not under the impression it had run long enough, or actually finished any legs to consider it "in the race" so to speak
In any case yes I was told that boat used a single stage turbine which I could see would certainly cause the issues you mention. Most of the modern attempts at boats use engines with free turbine shafts to avoid that issue.

Cheers
 

·
E-7 Sheepdog (ret)
Joined
·
6,834 Posts
Pops, I can't speak to this engine and setup, but all of the turbines I hae seen in various uses are driving power from the accessory drive gearbox (ADG), normally below the engine (although in some helo setups, it is above). Often where those helo engines are used, it is no big deal to invert the motor and put the ADG on the bottom.
This has a shaft output and is already geared down. This MAY be (and IMO is most likely) where they are hooking the pump to.
 
1 - 14 of 14 Posts
Top