BeechTalk - BT

Username Protected · **Posted:** 23 Nov 2023, 12:38

Username Protected wrote:

In contrast, a TPE331-10 engine will hold 665 HP to FL180-200 at ISA.

Mike C.

Keep in mind that a -10 that’s 665HP is a significantly derated engine. The -10 makes 940HP in the SA226, and over 1000HP wet. It’s temp limited on the ground above ISA if I remember right.

Username Protected · **Posted:** 23 Nov 2023, 19:22

The supplement stuff after the -1 conversion is a joke in my POH, but I'll see if I can scan in a few relevant documents. But there won't be updated performance numbers like Bradley said, one just have to kinda know it performs better. One thing is speed - the old 43BL engined ones barely broke 220kts up high, this will do 245-250ktas all day.

As for takeoff performance and not very scientific: but at home airport, KEMT, which has 4300ft rwy, I'm usually off, full tanks, just me, in just a little more than half on a hot California day. My estimate about 2300ft. Same thing on landing - if you do light reversing she'll stop in plenty of time to get off the E taxiway on rwy 19. If you go hard, she can do taxiway D.

Username Protected · **Posted:** 24 Nov 2023, 00:11

Username Protected wrote:

Useful info, thanks.

If anyone knows how high a pilot could expect to still get 575 hp that would be really helpful. I could work out most of the rest. Knowing it’s 665 at sea level is almost enough info, but any more data would still be vey useful.

From the F model manual with -1s. My torque table says ~1500 LB ft (~575 hp) is around 53-54 psi.

This table is bleed air off. No tables for bleeds on.

Username Protected · **Posted:** 24 Nov 2023, 19:57

Username Protected wrote:

From the F model manual with -1s. My torque table says ~1500 LB ft (~575 hp) is around 53-54 psi.

That is some data, but the MU2 installation is quite a bit different from the Commander, namely in the exhaust routing. That will change the numbers a bit. The MU2 has a very short and direct tail pipe which is more efficient. The inlets are also a bit different.

Mike C.

Username Protected · **Posted:** 01 Dec 2023, 13:58

Ad/spec sheet updated.

-Neal

Username Protected · **Posted:** 03 Dec 2023, 21:27

Username Protected wrote:

Price reduced to $265,000.

-Neal

can i get exact dimensions?

Username Protected · **Posted:** 04 Dec 2023, 00:11

44ft wingspan. 14ft high tail. 42ft long.

Username Protected · **Posted:** 04 Dec 2023, 17:12

wingspan is only 44'. I thought it was 48'?

Username Protected · **Posted:** 04 Dec 2023, 23:18

No, the first ones had the shorter wingspan of the 680 model before they added the inboard wing fillet. From 690 and onwards it jumped to 48ft and then eventually 53ft for the Jetprops.

Username Protected · **Posted:** 04 Dec 2023, 23:29

That’s a ton of airplane for the $$

Username Protected · **Posted:** 05 Dec 2023, 00:54

Username Protected wrote:

That’s a ton of airplane for the $$

Probably over 3 tons, actually.

Mike C.

Username Protected · **Posted:** 05 Dec 2023, 01:15

Explain the scope and schedule of the phase inspections.

Username Protected · **Posted:** 05 Dec 2023, 01:25

Username Protected wrote:

Explain the scope and schedule of the phase inspections.

Rob,

Here is a link to a document that Adam emailed me that describes the phase inspections and tasks: https://www.dropbox.com/scl/fi/4z4s5cva ... ase5l&dl=0

I am not on an expert on this make/model by any stretch but hopefully this helps answer your question in some way.

-Neal

Username Protected · **Posted:** 05 Dec 2023, 10:18

I'm not an A&P so can't compare it to anything, but looking at the phase inspection manual, it appears to me to be just like an annual on a piston, divided up into segments. Open up inspection panels, inspect, lube. Pretty straightforward.

Username Protected · **Posted:** 16 Dec 2023, 15:03

Username Protected wrote:

Here to answer any in-depth technical questions. :peace:

What is the performance of this at Gross - fuel burn vs. KTAS at optimal or some sample altitudes
Actual observed real world performance is the best information

Thanks

FS:1966 Rockwell Aero Commander 680V