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HelicopterOff Topics › How would you like to have this powering your​fishing boat?
12-22-2013 05:09 PM  3 years agoPost 1
CWALDO123

rrApprentice

Germantown , Tn -​Shelby

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Two Stroke V8, What A Beautiful sound

http://www.liveleak.com/view?i=9ee_1387714838

Hirobo Evo 50 ,Jr9303 ((( Are Those Things Hard To Fly ?? Nah !! Snicker )))

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12-22-2013 07:38 PM  3 years agoPost 2
wrongler

rrProfessor

Brewerton, New York

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That thing was sitting on its nose!

Bill Whittaker

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12-23-2013 12:47 AM  3 years agoPost 3
GREYEAGLE

rrElite Veteran

Flat Land's

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Wonderful they are still chasing Dragon's

I'd like to have it for my washing machine, surprised they even allowed a photo of it. Just as much science will go into the prop or counter prop's.

greyeagle

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12-23-2013 01:20 AM  3 years agoPost 4
Gearhead

rrMaster

Vt

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more on 2St and what they sound like

http://www.liveleak.com/view?i=ac9_1246730481

Jim
Buzz Buzz Buzz

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12-23-2013 01:32 AM  3 years agoPost 5
ticedoff8

rrKey Veteran

Morgan Hill, CA. USA

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Why is there no torque twist?

It was sitting an engine stand with wheels - when he hit the throttle, I expected it to wind up like a top.

I guess I never thought about it before - the V6 two stroke outboards are the same - and they don't torque when you hit the throttle either.

Is there a counter-rotating crackshaft that cancels the torque?

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12-23-2013 01:38 AM  3 years agoPost 6
Gearhead

rrMaster

Vt

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Why is there no torque twist?
that is a nice stand, you can see it move a bit, but I'm betting the wheels where locked

Jim
Buzz Buzz Buzz

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12-23-2013 01:42 AM  3 years agoPost 7
ticedoff8

rrKey Veteran

Morgan Hill, CA. USA

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More like "nailed to the ground".
That is a lot of power - there must be something canceling the torque.

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12-23-2013 03:57 AM  3 years agoPost 8
outhouse

rrVeteran

auburn ca

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Why is there no torque twist?
Light flywheel

Very light crankshaft and rods.

The rotating mass is all light weight.

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12-23-2013 04:07 AM  3 years agoPost 9
Blax1

rrVeteran

Sydney Australia

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Looked like the expansion chambers where hot though ....haha fancy doing that?

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12-23-2013 09:35 PM  3 years agoPost 10
RCHSF

rrKey Veteran

NC

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ticedoff8
Why is there no torque twist?
It was sitting an engine stand with wheels - when he hit the throttle, I expected it to wind up like a top.
I guess I never thought about it before - the V6 two stroke outboards are the same - and they don't torque when you hit the throttle either.
Is there a counter-rotating crackshaft that cancels the torque?
Weight, mostly. I seen many engine crank on the ground just sitting on a car tire. They seem to sit still.

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12-23-2013 11:28 PM  3 years agoPost 11
Mikerobe

rrVeteran

Green Turtle​Cay,Abaco, Bahamas.

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It's an old OMC Evinrude 275 or 300 Loop-Charged V8 Powerhead. Their power to weight ratio was awful! This was one of OMC's worst productions. When they released the 1991 Ocean-Pro series of their Loop-Charged V6s, the V8s were quickly replaced by them. Unfortunately the early(prior to 91) Looper V6s were a disaster as we had to literally carburete and sync & linc them to whatever boat/propeller combination was being rigged. The VRO(Variable Ratio Oiling) systems left a lot to be desired and were responsible for many premature powerhead failures. This coupled with Stator failures caused by Flywheel magnets that would come loose and migrate into the stator assy while running as well as the voltage regulators that would burn out and take with it all the other electrical components that they were mounted under, not to mention the failed lower units, had finally finished OMC.

The lot I got is not a lot, but I thank God a lot for the lot I got!

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12-28-2013 02:38 PM  3 years agoPost 12
Rotormaster

rrVeteran

Australia

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What A Beautiful sound
If you liked the sound of that, you must love the sound of rotaries! (I guess rotaries usually tend to sound like 2-stroke boat engines anyway)


------

Not allowed my indiscernibility of identicals sig because it breaks the HTML code.

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