09 Jan 2026, 23:29 [ UTC - 5; DST ]
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Post subject: Re: Extra EA 500 turboprop  Posted: 07 Jan 2026, 13:33 |
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Joined: 12/08/12
Posts: 1387
Post Likes: +1836
Location: Ukiah, California
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Username Protected wrote: IIRC, the Extra 400, had liquid cooled pistons.
The big negative of the airplane was cylinder cracking due to uneven cooling.
It was never a big seller.
Butch I've never heard of liquid cooled pistons. Liquid cooled cylinder heads (as in Rotax) are logical and maybe cylinders externally. There are engines with oil spray bars that cool the underside of pistons (I've owned two V-8s with this feature) but they are not considered "liquid cooled". Dan
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Post subject: Re: Extra EA 500 turboprop Posted: 07 Jan 2026, 13:46 |
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Joined: 09/11/09
Posts: 6319
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Company: Middle of the country company
Location: Tulsa, Ok
Aircraft: Rebooting.......
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I'm pretty sure he meant 'liquid cooled, piston engine'.........but I could be wrong.......
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Post subject: Re: Extra EA 500 turboprop Posted: 07 Jan 2026, 17:13 |
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Joined: 09/11/09
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Company: Middle of the country company
Location: Tulsa, Ok
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Username Protected wrote: It might have been the Continental TSIOL-550-A3 which was water cooled and I believe used on the Voyager. I think it was the same engine that Rocket engineering put in a Mooney M20L Wiki says TSIOL-550......  There was a Cessna 414 conversion to liquid cooled engines as well, but I'm pretty sure they've been orphaned. (The engine, that is......though maybe the airplane, too!)
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Last edited on 07 Jan 2026, 17:24, edited 1 time in total.
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Post subject: Re: Extra EA 500 turboprop Posted: 07 Jan 2026, 17:24 |
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Joined: 11/20/14
Posts: 6876
Post Likes: +5087
Aircraft: V35
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I like the EA’s looks also, but I don’t see a future for it. The smallest practical SE turboprop is the Piper Meridian with a PT6, and when you get below that with the Allison conversion for P210’s, Bonanzas, and the EA500 the limitations of the Allison make it unattractive.
If we had some engineering breakthrough and extraordinary subsidized development of small turboprop engines, it would be awesome to have EA sized new design small turboprops that are practical. Heck, I’d love to see a two seat version. But the R&D cost and experience curve is daunting.
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Post subject: Re: Extra EA 500 turboprop Posted: 07 Jan 2026, 17:27 |
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Joined: 09/11/09
Posts: 6319
Post Likes: +5688
Company: Middle of the country company
Location: Tulsa, Ok
Aircraft: Rebooting.......
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Username Protected wrote: I like the EA’s looks also, but I don’t see a future for it. The smallest practical SE turboprop is the Piper Meridian with a PT6, and when you get below that with the Allison conversion for P210’s, Bonanzas, and the EA500 the limitations of the Allison make it unattractive.
If we had some engineering breakthrough and extraordinary subsidized development of small turboprop engines, it would be awesome to have EA sized new design small turboprops that are practical. But the R&D cost and experience curve is daunting. Wondering if the GE Catalyst might.......pardon the pun......catalyze development of smaller, printed TP's....... 
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Three things tell the truth:
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Drunks
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Actually, four things.....
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Post subject: Re: Extra EA 500 turboprop Posted: 07 Jan 2026, 17:37 |
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Joined: 11/15/17
Posts: 1191
Post Likes: +616
Company: Cessna (retired)
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Username Protected wrote: I like the EA’s looks also, but I don’t see a future for it. The smallest practical SE turboprop is the Piper Meridian with a PT6, and when you get below that with the Allison conversion for P210’s, Bonanzas, and the EA500 the limitations of the Allison make it unattractive.
If we had some engineering breakthrough and extraordinary subsidized development of small turboprop engines, it would be awesome to have EA sized new design small turboprops that are practical. Heck, I’d love to see a two seat version. But the R&D cost and experience curve is daunting. At Cessna, we had a testbed P210 with a small block Allison turbprop. It was zippy down low but no faster than a P210R up high. It also needed a higher pressure differential since it was an ear popper.
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Post subject: Re: Extra EA 500 turboprop Posted: 07 Jan 2026, 19:25 |
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Joined: 02/27/08
Posts: 3467
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Location: Galveston, TX
Aircraft: Malibu PA46-310P
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Username Protected wrote: I'm pretty sure he meant 'liquid cooled, piston engine'.........but I could be wrong....... No wonder the TBO was only 1200 hours.. Makes sense now.
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Post subject: Re: Extra EA 500 turboprop Posted: Yesterday, 10:59 |
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Joined: 12/18/12
Posts: 866
Post Likes: +436
Location: Europe
Aircraft: Piper Malibu - A*
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Username Protected wrote: 1. Faster piston for piston turbine for turbine. Actually I think even the piston PA46 is faster than the turbine EA500. Turbine no comparison at all.
2. Farther (range)
3. Warmer cabin
4. Better infrastructure
5. Better parts supply
6. Better more reliable pressurization system
7. Better useful load
8. More reliable engine
9. Better range for given payload.
10. More modern avionics and systems. Whilst I agree 100% that the M Series Pipers beat the Extra in most comparisons, I will nonetheless play the devil's advocate : The Extra 400/500 beats M Series on : 1 Bigger Cabin 2 Quieter Cabin 3 Outstanding Crew Visibility (this needs to be experienced to appreciate) 4 Better ground visibility (high wing) 5 FAR MORE CREW LEG & HEAD ROOM !
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