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Hey Doug;
A lot of questions, some I don't have answers, or only estimates for. As to fuel efficiency, around 10-12 gph at 75%. Noise, different, but not much louder due to the turbo. Conversion costs, again, no idea. At this point, we have around $15,000 in the Rotary, including fabrication and dyno time. Accessories, maybe another $5-6K. Cowling is a work in progress, but it won't look like a stock Legacy when we're done.....(:-) Weight and balance should come out (hopefully) pretty close to stock. We will keep all posted as we proceed. Suffice to say the main attraction as I said earlier, was 4 total moving parts, higher hp to weight ratio, and running on pump gas, not to mention, cheap rebuild/maintenance costs.
Regards;
Greg
----- Original Message ----- From: "Douglas Brunner" <douglasbrunner@earthlink.net>
To: <lml@lancaironline.net>
Sent: Tuesday, January 27, 2009 3:47 PM
Subject: [LML] Re: Alternative Power Plants
Greg,
Very interesting and exciting!
A couple of questions:
How is the fuel efficiency compared to an IO-550?
What is the noise level compared to an IO-550?
What would be the total cost of converting from an IO-550 - including engine, all engine accessories, reduction gear, prop and belly scoop?
What will the new cowling look like?
What effect does this installation have on weight and balance?
D. Brunner
----- Original Message ----- From: "Greg Ward" <gregw@onestopdesign.biz>
To: <lml@lancaironline.net>
Sent: Monday, January 26, 2009 7:42 AM
Subject: [LML] Re: Alternative Power Plants
Hey All;
Hope this answers some questions.
The engine is a Mazda 20B 3-rotor, with a Garrett 4088 turbo, and as you can see, we've fabricated all of the manifolds. Won't know for sure until we dyno the engine next week, but we anticipate a conservative 450+ hp at take-off, and to be turbo-normalized to 20,000 ft. +. Initially we will be using a Catto 76" (130 deg. pitch) fixed pitch prop configured for cruise at around 250+ knots. Cooling will go into a custom belly scoop we have fabricated, along with the oil cooler, all with adjustable cowl flaps. Benefits are 4 total moving parts, excellent weight to power ratio, dual spark plugs, dual fuel injectors, (one each runner), dual oil system with oversize cooler and pan. Costs on the engine thus far have come in around $15,000, and we anticipate around 1000+ hours TBO, hopefully, as we are only running the engine at about 50% of it's max potential horsepower, and it runs on pump gas or 100LL, the computer doesn't care which......(:-). We are using a RWS redrive at 2.85:1 reduction, and Tracy's EC3 computer to make it all go. We anticipate a few bugs, but for the most part it seems pretty solid, we'll see.
Greg Ward
Lancair Legacy 20B N178RG in progress
----- Original Message ----- From: "Ron Laughlin" <ronlaughlin@gmail.com>
To: <lml@lancaironline.net>
Sent: Sunday, January 25, 2009 8:23 AM
Subject: [LML] Re: Alternative Power Plants
Cool but is there going to be enough room for a radiator?
RonL
On Jan 24, 2009, at 10:04 AM, "Greg Ward" <gregw@onestopdesign.biz> wrote:
Couple of shots of our engine ready to dyno. Going into our Legacy N178RG.
Greg Ward
Lancair 20B in progress
<P1000873 (Medium).JPG>
<P1000871 (Medium).JPG>
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