18 Apr 2024, 21:21 [ UTC - 5; DST ]
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Post subject: Re: Raptor Aircraft 5 Seat Pressurized 3,600 NM Range Die  Posted: 31 Dec 2019, 10:29 |
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Joined: 08/25/17
Posts: 8
Post Likes: +19
Location: Nashville JWN
Aircraft: PA-18
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Username Protected wrote: The test engineer in the video kept commenting on how big the cabin is. It's possible to still have a "big" 5-place cabin and still shrink it down from the current size in order to save weight and reduce drag.
His powerplant choice still seems like a loser to me. Do you have any time working on, driving behind, or racing that powerplant? I do. One of my favorite engines of all time. My biggest two issues in regards to the powerplant are the redrive and no 2nd channel FADEC. You lose the one computer and you're done. I don't particular care for that. Maybe that's just me.
Rich, you might be a good question to answer this then, given your TDI experience. Do you have concerns with his EGT temps? I've got some limited TDI/diesel experience, and they seem.... very high.
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Post subject: Re: Raptor Aircraft 5 Seat Pressurized 3,600 NM Range Die Posted: 31 Dec 2019, 16:47 |
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Joined: 05/03/18
Posts: 821
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Aircraft: 182P
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Username Protected wrote: I haven’t read all 99 pages of this thread. Has anyone suggested Jerry Wagner might be a good fit for test pilot? Kill two birds with one stone? LMAO!! 
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Post subject: Re: Raptor Aircraft 5 Seat Pressurized 3,600 NM Range Die Posted: 31 Dec 2019, 16:50 |
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Joined: 05/03/18
Posts: 821
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Aircraft: 182P
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Username Protected wrote: Exactly, let’s say I decide to build a tower to the moon. Having guts and determination isn’t the only thing that gets it done. Cool! Taking any escrow deposits?
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Post subject: Re: Raptor Aircraft 5 Seat Pressurized 3,600 NM Range Die Posted: 01 Jan 2020, 02:34 |
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Joined: 03/22/18
Posts: 3808
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Location: Nashville, TN
Aircraft: Lazarus - a B60 Duke
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Username Protected wrote:
Rich, you might be a good question to answer this then, given your TDI experience. Do you have concerns with his EGT temps? I've got some limited TDI/diesel experience, and they seem.... very high.
I'm not any kind of expert by any means, but I wouldn't be happy with those in a vehicle for sure. The primary issue is cooling. Can you run those temps and get adequate cooling through the jackets in the heads to compensate and not get damage in the heads over time? Maybe. Maybe not. The only time I see those kind of temps is after doubling the factory boost, sometimes with methanol injection, and doing HARD racing, but those are short durations (a few minutes at most) in between normal low RPM driving. The engine is built to take that kind of abuse, but prolonged higher temps? Would be a good question for Audi/VW racing division. I would suspect their heads are not factory assembly line parts though. For this to be a production plane I would want to see 2 or 3 of these engines run to failure and see what the mean average is. I would prefer a geared drive that allows the engine to run a little slower (and cooler) with a better geared prop. 3,000 RPM perhaps as a normal takeoff power setting and 2,500 cruise, where the engine was designed to run. Still haven't heard why he's running it at those higher RPM's by design. *should* be OK, but yeah those EGT's aren't great.
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Post subject: Re: Raptor Aircraft 5 Seat Pressurized 3,600 NM Range Die Posted: 01 Jan 2020, 03:44 |
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Joined: 03/15/16
Posts: 450
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Location: NC
Aircraft: Looking for one
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Username Protected wrote: Exactly, let’s say I decide to build a tower to the moon. Having guts and determination isn’t the only thing that gets it done. Cool! Taking any escrow deposits?
Yes, but if you give me $10,000. I’ll move you to the first 100 that gets to climb the tower! 
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Post subject: Re: Raptor Aircraft 5 Seat Pressurized 3,600 NM Range Die Posted: 01 Jan 2020, 10:25 |
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Joined: 05/11/10
Posts: 12403
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Location: Indiana
Aircraft: Cessna 185, RV-7
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Username Protected wrote: Yes, but if you give me $10,000. I’ll move you to the first 100 that gets to climb the tower! That’s the kind of determination GA needs right now! I applaud your outside-the-box thinking. Even if you only wind up with stairs to the back porch, I’d consider that a success!
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Post subject: Re: Raptor Aircraft 5 Seat Pressurized 3,600 NM Range Die Posted: 01 Jan 2020, 16:57 |
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Joined: 06/17/14
Posts: 5003
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Location: KJYO
Aircraft: C-182, GA-7
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Username Protected wrote: 100 ...not 100 pages yet! ...or 100 feet to the top of the tower. Stairs are still being built.
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