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01-27-2014, 05:03 PM
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Join Date: Aug 2011
Location: Erie, CO (KEIK)
Posts: 244
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400hp, 280 ft - lbs of torque and only 88lbs
I came across this earlier today. 88lbs for the engine, how much does the typical reduction drive weigh?*
http://www.motorauthority.com/news/1...015-lmp1-entry
"The engine is a turbocharged 1.5-liter three-cylinder putting out an incredible 400 horsepower, but what?s more impressive is that the engine weighs just 88 pounds"
*- I know, it's new, may never be in production, or practical for a dozen+ reasons, etc |
01-27-2014, 05:50 PM
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Join Date: Oct 2008
Location: Fresno, CA
Posts: 479
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That would be so cool. Of course it'll probably do that at 12,000 rpms
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Rick from Fresno
RV-7A
The art to flying lies in learning how to throw yourself at the ground and miss.
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01-27-2014, 07:07 PM
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Join Date: Nov 2010
Location: lake charles, La.
Posts: 699
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Impressive, maybe it would last to the second oil change? 
Bird
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Bird
rv8 entire airframe at airport now, painting done, intersection and gear upper and lower fairings done, maybe order engine around first of year or before the next rate increase.
"to fly is a privilege that I am so thankful to God for"
http://www.mykitlog.com/tcb328/
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01-27-2014, 07:44 PM
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Join Date: Mar 2005
Location: Calgary, Canada
Posts: 5,745
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Pretty cool. Amazing power to weight ratio.
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01-27-2014, 07:58 PM
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Join Date: May 2013
Location: Mount Vernon, Wa
Posts: 642
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Quote:
Originally Posted by humptybump
Actually, it's operated at 7500rpm so a nice 2:1 would do the trick. However, I'm more intreagued by the electricity "stint" power technology they plan to use for the first lap - an electric RV-12, anyone?
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The quick rule-of-thumb calculation figures out to almost exactly 7,500 RPM.
I wonder if that is SAE certified?
4.5HP per pound. I didn't think it was even possible to generate that kind of torque with so little mass!
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Ken W.
Mount Vernon, WA
2020 VAF Supporter
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01-27-2014, 09:30 PM
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Join Date: Mar 2005
Location: Calgary, Canada
Posts: 5,745
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Quote:
Originally Posted by N804RV
4.5HP per pound. I didn't think it was even possible to generate that kind of torque with so little mass!
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Lots 'o' boost makes lots 'o' hp. The F1 turbo engines were making 1200-1500hp from 1500cc 30 years ago on qualifying boost... |
01-28-2014, 06:55 AM
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Join Date: Dec 2010
Location: Hatton, ND
Posts: 124
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F1 motors
I'm a big fan of F1. But I think our motors need to last more than 2 hours.
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Edson Grindeland
Hatton, ND
RV-8 Flying
http://www.hattonflyingcircus.com
You do not need a parachute to skydive. You only need a parachute to skydive twice. 
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01-28-2014, 07:35 AM
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Join Date: Jan 2005
Location: Louisville, Ga
Posts: 7,840
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Yep
Quote:
Originally Posted by N804RV
......... I didn't think it was even possible to generate that kind of torque with so little mass!
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My PT-6 makes 680 SHP, 1600 lbs of torque, weighs 325 lbs. It does this on takeoff with the compressor disc spinning 37,500 rpm! (not a typo)... and has 9500 TTSNEW. Prop is geared down to 2200 rpm, max, on takeoff. I had the gearbox rebuilt at 9,000 hours.
Best,
__________________
Pierre Smith
RV-10, 510 TT
RV6A (Sojourner) 180 HP, Catto 3 Bl (502Hrs), gone...and already missed
Air Tractor AT 502B PT 6-15 Sold
Air Tractor 402 PT-6-20 Sold
EAA Flight Advisor/CFI/Tech Counselor
Louisville, Ga
It's never skill or craftsmanship that completes airplanes, it's the will to do so,
Patrick Kenny, EAA 275132
Dues gladly paid!
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01-28-2014, 08:42 AM
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Join Date: May 2013
Location: Mount Vernon, Wa
Posts: 642
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Quote:
Originally Posted by pierre smith
My PT-6 makes 680 SHP, 1600 lbs of torque, weighs 325 lbs. It does this on takeoff with the compressor disc spinning 37,500 rpm! (not a typo)... and has 9500 TTSNEW. Prop is geared down to 2200 rpm, max, on takeoff. I had the gearbox rebuilt at 9,000 hours.
Best,
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Yeah, that "angular velocity" and thermodynamics will do that for ya. I guess I should have qualified that with "...from a piston driven engine."
Its still only a horsepower to weight ratio of about 2:1. given allowances for "brake horsepower" vs "shaft horsepower, I suspect that that's still not even close.
The N-model Hueys use 2 PT-6s joined together by a combining gear box. I used to hate pulling those things! 
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Ken W.
Mount Vernon, WA
2020 VAF Supporter
Last edited by N804RV : 01-28-2014 at 09:57 AM.
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01-28-2014, 08:54 AM
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Join Date: Aug 2007
Location: Wichita Falls, TX
Posts: 2,182
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Quote:
Originally Posted by pierre smith
My PT-6 makes 680 SHP, 1600 lbs of torque, weighs 325 lbs. It does this on takeoff with the compressor disc spinning 37,500 rpm! (not a typo)... and has 9500 TTSNEW. Prop is geared down to 2200 rpm, max, on takeoff. I had the gearbox rebuilt at 9,000 hours.
Best,
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How's the fuel flow rate with that PT-6 at takeoff power?  
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Neal Howard
Airplaneless once again...
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