26 Oct 2025, 05:13 [ UTC - 5; DST ]
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Username Protected
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Post subject: Re: Raptor Aircraft 5 Seat Pressurized 3,600 NM Range Die  Posted: 02 Nov 2019, 17:14 |
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Joined: 05/17/10
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Location: canuck
Aircraft: x23mouse
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Username Protected wrote: “The best engine conversion I know is to take $10,000 and convert it into a used Lycoming.”
— Van https://www.vansaircraft.com/powerplants/Quote: It seems magazines are always printing stories about automobile engines bought for junkyard prices, mated to inexpensive reduction drives and flown off into the sunset. It simply doesn’t work like that in the real world. then there is the argument out there, that the engine selected for the raptor "IS a game changer" only dummies don't get it
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Post subject: Re: Raptor Aircraft 5 Seat Pressurized 3,600 NM Range Die Posted: 02 Nov 2019, 17:53 |
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Joined: 03/15/16
Posts: 441
Post Likes: +349
Location: NC
Aircraft: Looking for one
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Username Protected wrote: “The best engine conversion I know is to take $10,000 and convert it into a used Lycoming.”
— Van https://www.vansaircraft.com/powerplants/Quote: It seems magazines are always printing stories about automobile engines bought for junkyard prices, mated to inexpensive reduction drives and flown off into the sunset. It simply doesn’t work like that in the real world. then there is the argument out there, that the engine selected for the raptor "IS a game changer" only dummies don't get it
Heck, imagine how prices for junkyard TDIs are going through the roof when 1500 depositors try to find them. Audi isn't going to sell to people if they find out it's going to be used in experimental aviation.
Assuming the stars align and this is a 230+ tas cruise @ 7 gph, $130k aircraft and they have the production to get them out the door. I just don't see how they would even be able to get the engine.
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Post subject: Re: Raptor Aircraft 5 Seat Pressurized 3,600 NM Range Die Posted: 02 Nov 2019, 18:52 |
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Joined: 05/17/10
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at a quick glance this part jumps out https://www.motorreviewer.com/engine.php?engine_id=91Quote: 3.0 V6 TDI Engine Problems and Reliability
The technically sophisticated 3.0 TDI requires a lot of effort and money for any repair.
anyone know what year/variant engine the raptor uses? earlier vers have known history issues
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Post subject: Re: Raptor Aircraft 5 Seat Pressurized 3,600 NM Range Die Posted: 02 Nov 2019, 18:57 |
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Joined: 05/17/10
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Username Protected wrote: An interesting point was brought up during a talk with a friend of mine.
If this is a belt driven prop, when the belt brakes in the air, would you end up with a runaway prop situation?
At high RPM's it can be a very interesting few seconds, until one realizes that the belt took a dump. i'm guessing that's why they went twin belts, if one breaks then hopefully #2 remains
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Post subject: Re: Raptor Aircraft 5 Seat Pressurized 3,600 NM Range Die Posted: 02 Nov 2019, 18:59 |
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Joined: 10/05/11
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Company: Hausch LLC, rep. Power/mation
Location: Milwaukee, WI (KMKE)
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Username Protected wrote: An interesting point was brought up during a talk with a friend of mine.
If this is a belt driven prop, when the belt brakes in the air, would you end up with a runaway prop situation?
At high RPM's it can be a very interesting few seconds, until one realizes that the belt took a dump. And a freewheeling prop that does not feather is a huge source of drag. Does this prop feather?
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Post subject: Re: Raptor Aircraft 5 Seat Pressurized 3,600 NM Range Die Posted: 02 Nov 2019, 19:15 |
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Joined: 05/17/10
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Location: canuck
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Username Protected wrote: An interesting point was brought up during a talk with a friend of mine.
If this is a belt driven prop, when the belt brakes in the air, would you end up with a runaway prop situation?
At high RPM's it can be a very interesting few seconds, until one realizes that the belt took a dump. And a freewheeling prop that does not feather is a huge source of drag. Does this prop feather?
if one belt breaks, could it take out the engine here?
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Post subject: Re: Raptor Aircraft 5 Seat Pressurized 3,600 NM Range Die Posted: 02 Nov 2019, 19:34 |
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https://www.vansaircraft.com/powerplants/Quote: Do you want to spend your time and effort on engine development or do you want to fly confidently behind an engine that has already been developed?
We, too, would like to see “something better” in available aircraft powerplants. We are carefully watching a variety of developing alternatives. Meanwhile, the proven Lycomings do the job very well and are the best “available now” option. Despite the many claims and promises made by promoters, we feel that if you will look closely at what is actually available, how many are really flying, and how well they really perform, you will agree with our conclusions.
While we are not opposed to RV builders installing alternate engines, we simply cannot recommend or encourage the installation of any other engine – we don’t feel doing so would best serve the interest or safety of the builder.
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Post subject: Re: Raptor Aircraft 5 Seat Pressurized 3,600 NM Range Die Posted: 02 Nov 2019, 19:48 |
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these folks have been around for awhile, note the shrouding http://www.beltedair.com/BAProducts.htmhttp://www.beltedair.com/FB005.jpghttp://www.beltedair.com/OurPlane.htmQuote: As for the speed reduction unit, it does have an effect on the engine. From the tip of the crankshaft farthest from the propeller to the propeller itself, everything has to be in agreement. Bearing loads, structural loads, torsional reversals, harmonics, and use of correct materials all play a big roll in the success of the overall power plant unit. Every bit of this must be professionally engineered to ensure a cost effective reliable power package. Without the proper engineering you could be misled into thinking the reduction unit is performing OK when in fact it could be detrimental to the engine itself.
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Post subject: Re: Raptor Aircraft 5 Seat Pressurized 3,600 NM Range Die Posted: 02 Nov 2019, 21:04 |
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Joined: 07/21/08
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Location: Decatur, TX (XA99)
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Username Protected wrote: still looking for a test pilot I nominate Chris. He's obviously the smartest guy here. I'd do it, but all this polar talk is just Greek to me....
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Post subject: Re: Raptor Aircraft 5 Seat Pressurized 3,600 NM Range Die Posted: 03 Nov 2019, 11:29 |
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Joined: 10/06/19
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Company: Water Cleaners
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Username Protected wrote: still looking for a test pilot I nominate Chris. He's obviously the smartest guy here. I'd do it, but all this polar talk is just Greek to me....
Das funny! Clever.
Καμία εκπαίδευση δεν προέρχεται από τη δεύτερη απεργία του μουλάρι!!
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Post subject: Re: Raptor Aircraft 5 Seat Pressurized 3,600 NM Range Die Posted: 03 Nov 2019, 11:40 |
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Joined: 01/18/11
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Location: Lakeland , Ga
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For some reason i keep reading this thread. About the most useless in BT history.
I must be a glutton for something.
The project itself is interesting.
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Post subject: Re: Raptor Aircraft 5 Seat Pressurized 3,600 NM Range Die Posted: 03 Nov 2019, 11:44 |
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Joined: 01/18/11
Posts: 7664
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Location: Lakeland , Ga
Aircraft: H35, T-41B, Aircoupe
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Username Protected wrote: still looking for a test pilot I nominate Chris. He's obviously the smartest guy here. I'd do it, but all this polar talk is just Greek to me....
Polish talk
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