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1. 06:20 AM - Re: RV8A turbine engine (Scott Bilinski)
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| Subject: | RV8A turbine engine |
--> Engines-List message posted by: Scott Bilinski <bilinski@kyocera-wireless.com>
All I have to say is I wish you the best of luck getting this all to work.
I was going down the same road as you until I called the insurance
companies, they would not even talk to me, I ended up with a Lycoming.
08:48 PM 1/22/04 -0500, you wrote:
>--> Engines-List message posted by: Doug Ritter <d.d.ritter@verizon.net>
>
>Thanks Gordon for your replay and thank you to all the other replies I have
>received.
>
>You are correct with the specs on the Allison B17C (420 shp) but what I
>have in mind is the smaller 250 B15A or 15G at 317 shp with a fuel rate of
>.697 lbs/shp/hr (apx 18-20 gph). If I convert the forward baggage of the
>8A to a fuel tank I can get 20 gals more and if I pump the wing tanks into
>it I can keep the CG in spec considering the less weight (180 lbs compared
>to 386 for a dinosaur Lycoming). The length is the same, 45 inches but I
>will still need to redesign the cowl to a nice taper. With extra fuel I
>should get my range back plus. I don't want to push the RV beyond the
>speed limit but that limit needs to be determined. Needless to say I don't
>want to burst my eardrums by phoning Van's for advice. My mentor is the
>Beach A36 conversion being done by Trade Wind Aviation
>(http://www.tradewind-bonanza.com/index.html) although they are using the
>B17C as you mentioned. As far as the cost is concerned - the helicopter
>version (C18 or T63 700A military turboshaft) are as low as $10k with up to
>1k TBO left and seem to be readily available. My problem is that I have
>not been able to locate the turboprop version (B15) anywhere. They are the
>same engine except one is turned upside down to the other and the plumbing
>is a little different. But I would need the prop reduction gearbox that
>bolts onto the shaft output. Any leads?
>There are so many pluses and negatives to this turbine approach but my
>desire is to climb like a screaming banshee, to fly at 18k over the
>Rockiest, to be a sensation at air shows and have a hell of a lot of fun
>in my little fighter plane. (I'm 59 going on 18)
>
>
>At 08:17 PM 1/21/2004 -0500, you wrote:
>>--> Engines-List message posted by: "Gordon and Marge" <gcomfo@tc3net.com>
>>
>>
>>-----Original Message-----
>>From: owner-engines-list-server@matronics.com
>>[mailto:owner-engines-list-server@matronics.com] On Behalf Of Doug
>>Ritter
>>To: engines-list@matronics.com
>>Subject: Engines-List: RV8A turbine engine
>>
>>
>>--> Engines-List message posted by: Doug Ritter <d.d.ritter@verizon.net>
>>
>> I am dead-set on an
>>alternative engine for my RV8A project that does not include an "old
>>fashioned" gasoline piston engine. A small gas turbine is my number one
>>
>>choice, a piston diesel is second and a rotary is third. Two choices
>>for
>>the turbine are an Allison 250 series T63 (250 to 300 hp) and the newly
>>under development ATP (Affordable Turbine Power 200+ hp) I have done a
>>lot
>>of product research and selected several vendors for the Allison at
>>around
>>$13k for a basic engine.
>>Doug Ritter
>>Alexandria, VA
>>703-360-5219
>>
>>Doug: I can empathize with your desire for an alternative engine and
>>agree that a small gas turbine has its appeal. I have no specific
>>information on the Allison to which you refer but I do have some on the
>>-B17C of 420hp. The weight is good but it is a bit long at 45". The
>>killer is the fuel consumption: .657 Lbs/SHP/Hr at max power and .656 at
>>369hp normal cruise. At 90% it is .670 and at 75% (277hp)it is .715.
>>These are sea level numbers. With altitude the power tapers off and so
>>does the fuel flow but the flow at taxi settings is very high. For
>>example, at 12000' on a hot day the engine should produce 260hp and the
>>fuel flow is nearly 170 lb/hr. Turbines come into their own at higher
>>altitudes. My general impression is that as turbines get smaller the
>>fuel specifics get worse. Perhaps others on the list can amplify on
>>this.
>>I have placed myself on the delivery list for a DeltaHawk diesel because
>>it seems to be priced competitively, has good fuel specifics and
>>excellent altitude performance. It remains to be seen whether
>>deliveries will be made but I am optimistic. I think the rotary has a
>>lot to offer but have not warmed up to it because of the sound and
>>because of the throwaway lube system for the apex seals. Petty reasons
>>I'm sure but they are mine and so far at least, I'm sticking to them.
>>Affordable Turbine Power is a big question mark for me. At Oshkosh they
>>said they had partnered with an aerospace company that mfr'd turbo pumps
>>but their website says they are still seeking partners. The package
>>looks good but we need to see it proven and produced. Time will tell.
>>Good luck in your quest. If you get specifics on the T63 perhaps you
>>could post them to the list.
>>
>>Gordon Comfort
>>N363GC
>>
>>
>
>
Scott Bilinski
Eng dept 305
Phone (858) 657-2536
Pager (858) 502-5190
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