23 Apr 2024, 17:51 [ UTC - 5; DST ]
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Post subject: Re: interesting Diamond new retract diesel single Posted: 07 Nov 2019, 20:45 |
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Joined: 01/30/09 Posts: 6088 Post Likes: +3381 Location: Oklahoma City, OK (KPWA)
Aircraft: planeless
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Username Protected wrote: I like how it looks You kind of have to.
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Post subject: Re: interesting Diamond new retract diesel single Posted: 07 Nov 2019, 21:47 |
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Joined: 06/17/14 Posts: 5018 Post Likes: +1951 Location: KJYO
Aircraft: C-182, GA-7
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Wouldn’t they need a bit stronger of an engine in order to get 5 FAA standard bodies, or 4 and a child, as well as a reasonable amount of fuel in the air? My thoughts are about 250 horses for a comfortable takeoff roll and climb.
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Post subject: Re: interesting Diamond new retract diesel single Posted: 07 Nov 2019, 22:30 |
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Joined: 11/20/14 Posts: 6478 Post Likes: +4566
Aircraft: V35
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Two things that would really open up the envelope for piston single designs:
*) 300hp Diesels running Jet-A at a similar acquisition cost / overhaul cost to existing gas engines. Do today’s Cirrus / Bonanza missions on half the fuel cost. *) 400-450hp recip engines of either gas or diesel, allowing Pilots to have the optional equipment they want in today’s 300hp singles (chute, A/C, deice, turbo, oxy, etc) with some useful load and room for modern size humans.
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Post subject: Re: interesting Diamond new retract diesel single Posted: 08 Nov 2019, 09:54 |
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Joined: 01/05/11 Posts: 314 Post Likes: +226
Aircraft: 1969 Aerostar 600,
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Username Protected wrote: I'll be watching this one closely! You're gonna fall asleep watching this one.
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Post subject: Re: interesting Diamond new retract diesel single Posted: 08 Nov 2019, 10:05 |
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Joined: 05/17/10 Posts: 4434 Post Likes: +1739 Location: canuck
Aircraft: x23mouse
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Username Protected wrote: Then there's the TBR issue. 1200hrs between *replacement* of the CD300. Not overhaul, replacement.
Will it be an airworthiness limitation? 1200hrs/12yrs and you buy a new one, no matter what?
_________________ nightwatch...
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Post subject: Re: interesting Diamond new retract diesel single Posted: 08 Nov 2019, 10:22 |
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Joined: 01/20/15 Posts: 583 Post Likes: +129 Location: St. Augustine, Florida
Aircraft: Cessna Cardinal 177B
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That cabin "hump" reminds me of the Ryan Navion or Disney's Dusty Crophopper. Not exactly gorgeous. Attachment: Diamond.JPG Attachment: Navion.JPG Attachment: Dusty.jpg
Please login or Register for a free account via the link in the red bar above to download files.
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Post subject: Re: interesting Diamond new retract diesel single Posted: 08 Nov 2019, 10:37 |
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Joined: 10/03/16 Posts: 273 Post Likes: +181 Location: Chicagoland
Aircraft: Mooney Acclaim
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Username Protected wrote: Yeah the JetA thing is a big deal. I wonder why Cirrus hasn't gotten one going? No reliable supply of reliable engines. The whole musical chairs in the business ownership, who's making what and so on. Then there's the TBR issue. 1200hrs between *replacement* of the CD300. Not overhaul, replacement. Will it be an airworthiness limitation? 1200hrs/12yrs and you buy a new one, no matter what? 1200 hours is where all the new engine designs start, and as time is built on the fleet, the TBO/TBR numbers have gone up to approximately the same as conventional gas engines’s numbers. Austro is now 1800 hours TBO, and CMI CD135 is up to 2100. In the case of the Austro, the increase was retroactive, and in the case of the CMI, there was a serial number cut with many design and parts changes.
The 12 year life limit exists also for most gas engines, though opinions on how to interpret the language, which chapter of the maintenance manual it’s published in, and under what authority the aircraft is operated.
TCO compares quite favorably with a gas engine. I believe we have the same TSIO550 G on our planes, and the invoice for a factory reman is something like $85,000. I’m not looking forward to that. I ran the numbers some time ago on a 1500 TBO austro and TVD-equipped CD135, and for 2 engines on a DA42, the scheduled mx and overhaul reserve came to something like $46 and $87 per hour. Both engines. Obviously it’s a different application than our go-fast singles, but throw in a mid-life top and 50 hour oil changes, and you’re right there with the hourly cost for 2 austro engines.
Diamond did fly the DA50 with an austro 170 hp engine. They called it the DA50 magnum, but I was thinking at the time that “rimfire” might be closer to the mark. Performance on this single should be quite a bit better. The DA62 performs nicely on 20% more power, and it has more drag and almost certainly more weight.
One challenge that Diamond and its dealers need to overcome is the density of service centers. Pretty much anyone can work on my TSIO550. The continental and austro diesels, on the other hand, require special equipment and training. This problem goes away with a concerted effort by DAI and dealers and with more in service. -dan
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Post subject: Re: interesting Diamond new retract diesel single Posted: 08 Nov 2019, 11:53 |
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Joined: 01/05/11 Posts: 314 Post Likes: +226
Aircraft: 1969 Aerostar 600,
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Unfortunately, if you want to see what the diesel 50 will perform like all you have to do is look at the diesel 40. It's heavy and a dog. To bad. The Avgas Diamonds were real performers. Not so for the diesels. That being said, Diamond does have a market for their planes. It's just not real big on performance.
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