If one is good, two is better.

[Mcstealth]

I have only seen one of these once out in the wild. To see two in one spot is pretty cool. 

Edited April 8, 2022 by Mcstealth

[mike_elliott]

thats one way to get rid of that pesky mixture knob

[MooneyMitch]

Wouldn’t that be fun for our backwards tailed airplanes? 

[aviatoreb]

I always thought those are pretty cool!  Practical or not - ok, probably not - I wouldn't mind having one of those things in my hangar.

Nice 5 blade props!

What's the deal - clearly they go together both with matching props and same location.  Is that some kind of 135 operation or something?

[carusoam]

It’s that the same RR engine that was scheduled for the Mooneys back in 2008?

Low altitude helicopter turbine..?

Best regards,

-a-

[A64Pilot]

Army designation T63-A700 318 SHP or T63-A720 420 SHP. light helicopter or light scout / observation airplane is what the engine was for, it ended up in helicopters of course.

It was I believe designed and built originally by Detroit Diesel, then Allison bought it, then of course RR when they bought Allison, but it’s a Detroit Diesel really  

https://en.wikipedia.org/wiki/Allison_Model_250

The compressor tolerances have to be very tight for a small compressor to be efficient, so it’s compressor halves are plastic lined and the compressor actually shaves clearance in, so it’s pretty much zero clearance, but that plastic lining isn’t very good in sand.

Edited April 8, 2022 by A64Pilot

[Mcstealth]

4 hours ago, aviatoreb said:

 

Nice 5 blade props!

What's the deal - clearly they go together both with matching props and same location.  Is that some kind of 135 operation or something?

Can you believe that there are actually three on this little field, in a small south-Texas oil field town of Kennedy, TX.  First pilot got one, then two more were not far behind. 

 

[aviatoreb]

10 hours ago, Mcstealth said:

Can you believe that there are actually three on this little field, in a small south-Texas oil field town of Kennedy, TX.  First pilot got one, then two more were not far behind. 

 

I don't know about you, but I would be so embarrassed if I showed up at a pancake breakfast in my special turbine bonanza, and then two other same airplanes showed up.

Edited April 9, 2022 by aviatoreb

[BKlott]

Those five blade props look great, right up until the time you have to overhaul or replace it. 

[0TreeLemur]

On 4/13/2022 at 10:10 PM, BKlott said:

Those five blade props look great, right up until the time you have to overhaul or replace it. 

I imagine that the hub for a 5-bladed prop is at least 1/4 of the weight of a Lycoming 4 cyl. engine...

[Hank]

5 hours ago, 0TreeLemur said:

I imagine that the hub for a 5-bladed prop is at least 1/4 of the weight of a Lycoming 4 cyl. engine...

And I'm so very happy that I don't have to machine and assemble it!!

[StevenL757]

On 4/13/2022 at 11:10 PM, BKlott said:

Those five blade props look great, right up until the time you have to overhaul or replace it. 

No kidding.  For comparison, the new 5-blade Hartzell on the TBM850 currently sits at $86,000.