29 Mar 2024, 05:21 [ UTC - 5; DST ]
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Post subject: Re: Small Turbines Posted: 24 Apr 2017, 00:00 |
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Joined: 01/16/11 Posts: 11105 Post Likes: +7090 Location: Somewhere Over the Rainbow
Aircraft: PC12NG, G3Tat
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Turbines way more reliable......... JetA is half the price of Avgas......... ......carry on
_________________ ---Rusty Shoe Keeper---
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Post subject: Re: Small Turbines Posted: 24 Apr 2017, 08:22 |
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Joined: 03/17/08 Posts: 6052 Post Likes: +12360 Location: KMCW
Aircraft: B55 PII,F-1,L-2,OTW,
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Username Protected wrote: :D
Turbines way more reliable.........
JetA is half the price of Avgas.........
......carry on Yeah, but they smell really bad....
_________________ Tailwinds, Doug Rozendaal MCW Be Nice, Kind, I don't care, be something, just don't be a jerk ;-)
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Post subject: Re: Small Turbines Posted: 24 Apr 2017, 10:08 |
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Joined: 08/21/13 Posts: 877 Post Likes: +590 Location: Charlotte NC (KEQY)
Aircraft: 1972 58 (TH-237)
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Username Protected wrote: They claim it will make 100hp on 8 gph, which is 12.5hp/gph, which is what a 7:1 compression avgas engine makes LOP.
Not sure I find that credible. Some of the their claims in the VAF thread: Quote: Our 200hp engine will be optimized for a 180hp cruise. At that power, the fuel flow is anticipated to be 14.6gph. When pulled back to 135hp, I would estimate (we don't have actual figures yet for the -200) that the fuel flow would be about 12-13gph. This is only 20-30% more than the O360 at the same power but the engine installation is 250-300lbs heavier for the O360.
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Actually, the group of RV owners that are interested in developing the FWF package have RV9s and were interested in our -120 engine. I guess that our -120 at OCP (100hp) is the same power as the O360 at 55% power with our -120 burning 8.4gph and the O360 burning 7.7gph so very similar fuel burns at that power setting. 36 gallons still gives just under 4 hours endurance plus VFR reserves. The 36g of JetA will weigh a tad more than the same volume of Avgas, but the installation is 300 lbs lighter, maybe 250lbs with a modified nose but still appreciably lighter. That will help offset the reduced power available for take-off and climb.
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Post subject: Re: Small Turbines Posted: 24 Apr 2017, 10:12 |
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Joined: 05/13/14 Posts: 8308 Post Likes: +6508 Location: Central Texas (KTPL)
Aircraft: PA-46-310P
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Quote: ... but the engine installation is 250-300lbs heavier for the O360.
Lighter is better, but doesn't this present some significant balance problems?
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Post subject: Re: Small Turbines Posted: 24 Apr 2017, 10:26 |
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Joined: 11/08/12 Posts: 12798 Post Likes: +5224 Location: Jackson, MS (KHKS)
Aircraft: 1961 Cessna 172
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Username Protected wrote: Quote: ... but the engine installation is 250-300lbs heavier for the O360.
Lighter is better, but doesn't this present some significant balance problems? Yeah - look at a Malibus vs. Jetprop
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Post subject: Re: Small Turbines Posted: 24 Apr 2017, 10:47 |
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Joined: 08/21/13 Posts: 877 Post Likes: +590 Location: Charlotte NC (KEQY)
Aircraft: 1972 58 (TH-237)
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Username Protected wrote: Quote: ... but the engine installation is 250-300lbs heavier for the O360.
Lighter is better, but doesn't this present some significant balance problems? Think of it as an opportunity for an extra baggage compartment in the nose
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Post subject: Re: Small Turbines Posted: 24 Apr 2017, 11:30 |
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Joined: 05/13/14 Posts: 8308 Post Likes: +6508 Location: Central Texas (KTPL)
Aircraft: PA-46-310P
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Username Protected wrote: Lighter is better, but doesn't this present some significant balance problems? Think of it as an opportunity for an extra baggage compartment in the nose More like an obligation. And the baggage needs to be lead or gold.
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Post subject: Re: Small Turbines Posted: 24 Apr 2017, 11:33 |
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Joined: 05/29/14 Posts: 2879 Post Likes: +2933 Location: CEA3
Aircraft: PA24-260, C340 Ram 7
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Username Protected wrote: Yeah, but they smell really bad....
Hmmmmm, not to me! Murray
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Post subject: Re: Small Turbines Posted: 24 Apr 2017, 11:48 |
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Joined: 08/26/15 Posts: 9514 Post Likes: +8745 Company: airlines (*CRJ,A320) Location: Florida panhandle
Aircraft: Travel Air,T-6B,etc*
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Username Protected wrote: A turbo prop sounds 47% better than a piston....
Cannot Agree OK, round engines and unmuffled V12s.
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Post subject: Re: Small Turbines Posted: 24 Apr 2017, 14:38 |
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Joined: 01/23/13 Posts: 8012 Post Likes: +5717 Company: Kokotele Guitar Works Location: Albany, NY
Aircraft: C-182RG, C-172, PA28
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Username Protected wrote: Cheap turbine is possible but not in GA. Chrysler built one for the "jet car" which was comparable in price and efficiency to a piston engine. In GA that 150hp turbine will cost $500,000 and burn 25 gph. The manufacturing landscape has changed enough that I think this is no longer true. The SubSonex uses a turbine that has to burn about 18 gal/hr on about 200 hp, and cost $55,000.
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Post subject: Re: Small Turbines Posted: 24 Apr 2017, 14:52 |
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Joined: 11/03/08 Posts: 14529 Post Likes: +22860 Location: Peachtree City GA / Stoke-On-Trent UK
Aircraft: A33
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Username Protected wrote: Cheap turbine is possible but not in GA. Chrysler built one for the "jet car" which was comparable in price and efficiency to a piston engine. In GA that 150hp turbine will cost $500,000 and burn 25 gph. The manufacturing landscape has changed enough that I think this is no longer true. The SubSonex uses a turbine that has to burn about 18 gal/hr on about 200 hp, and cost $55,000. also it may be more true then than now - note that Chrysler only made one of those and who knows what it cost them?
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