Post subject: Re: Maybe New Piper Offering - M700??
Posted: 09 Feb 2024, 09:19
Joined: 08/20/09 Posts: 2538 Post Likes: +2088 Company: Jcrane, Inc. Location: KVES Greenville, OH
Aircraft: C441, RV7A
Username Protected wrote:
About a 1000 feet off. About 10,700. I usually use the RVSM only for crossing lines of severe weather, and then descend on the other side. Amazing how often you can get glimpses of the towers at 30K where you are pure IMC below. Still a 100% radar operation, but something comforting about seeing blue when you have embedded cells.
So far I haven't seen anything in print where Piper says it's the fastest single-engine aircraft ever. The writer of that article said that and may have misunderstood when Piper said it was their fastest single-engine aircraft ever in their 87 year history.
I have seen some comments that Piper will not deliver this by Q2. As Chuck stated, they've been flying this for a few years now. They're smart enough to announce it when it's ready to go, I'm sure they already have orders that folks were ready to place for 600's. In fact, I know. DAMH
I'm excited to see the first flight reports and actual real numbers.
What is strange to me is that Piper used CGI for the marketing and product reveal.
If the prototype has been flying around for a year, why couldn't they show that? Or if it's really just an M600 with a pimped out engine then just show one of those. The computer depiction was cheesy for a 4MM product.
Post subject: Re: Maybe New Piper Offering - M700??
Posted: 09 Feb 2024, 13:21
Joined: 08/05/16 Posts: 3137 Post Likes: +2284 Company: Tack Mobile Location: KBJC
Aircraft: C441
Username Protected wrote:
What is strange to me is that Piper used CGI for the marketing and product reveal.
It was bush league. My thought after watching the video was that they had whatever was in petty cash for their production budget.
We met with their marketing team and my understanding was it was two gals. I assume they use an outside agency for launches like this. It reminds me of the TBM toilet video.
Just don't get why they don't have the G3000 in that airplane. They could have had the certified by now. The $100K delta or so, isn't going to stop someone from buying it, but maybe a G1000NXI is.
Post subject: Re: Maybe New Piper Offering - M700??
Posted: 09 Feb 2024, 15:31
Joined: 04/20/15 Posts: 654 Post Likes: +362 Location: KFAT
Username Protected wrote:
Just don't get why they don't have the G3000 in that airplane. They could have had the certified by now. The $100K delta or so, isn't going to stop someone from buying it, but maybe a G1000NXI is.
They have a mountain of projects to get through. My wish list would put the FADEC -67 engine in there before G3000. My guess is ramping up production is their highest priority since they have the wait list. They had to dig a big hole to certify the plane. Might as well work on filling it as quickly as possible.
Thx John for embedding. The BT guide didn't work. Makes me feel old.
Post subject: Re: Maybe New Piper Offering - M700??
Posted: 09 Feb 2024, 15:41
Joined: 08/05/16 Posts: 3137 Post Likes: +2284 Company: Tack Mobile Location: KBJC
Aircraft: C441
Username Protected wrote:
What speed do you need to fly to get the big range number? Not sure anyone would fly it that way. Looks like a 300 knot 1,000nm airplane, which is fine for an airplane with no toilet.
I have been told the range on the M700 is pretty much the same as the M600. This is not vapor wear the plane has been flying for a couple years. The LRC is longer than the M600, so would expect normal cruise to be around the same as the M600. Not mentioned is that the 1740 lbs max fuel is a light top off. I have been able to get 1900 lbs in the plane. Yesterday at KMAI (cheapest JetA full serve that I could find down there), got 1840 lbs. just ordered a regular top off, nothing special. Notwithstanding, at normal cruise and IFR reserve, we have about 1400 nm no wind range. I expect the M700 to do the same, but the beauty is that you can pull the power back a little and get much better range. up to 20%, fairly linearly depending on power settings. In cruise you are bring about 1 pound per nm, so can look at the tanks and see how much range you have left in cruise. If you pull the power back in the descent, you keep the 1 nm per pound range. But nobody buys an M600/M700 to not see that barber pole every now and then .
Did this flight yesterday in a friends M600 with a slight headwind from Utah all the way through Colorado before changing to neutral and then headwind. 1468 nm landing with 1.5 hours reserve fuel.
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These planes go westbound as well. From a few days ago, with a brutal headwind, flying at max gross weight with 4 onboard. 1158 nm landing with almost 2 hours reserve fuel.
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If I could afford a $4M airplane I'd have a hard time buying a new anything, so I'm not the market. With that said: we flew from Teterboro back to Denver and before descent computed we could have made it to the west coast, at 300 knots which is both the max speed and max range (roughly). This was a very atypical day with a tailwind going west, but that's about 2,300nm and we have as many as 8 seats, a relatively private flushing potty area, and a large nose baggage area, for the price of a used Meridian. Up high we burn 57-58gph total.
Incidentally departure seemed annoyed we were on a busy route at FL340 and asked our mach number, and probably rolled his eyes when I said ".50". We had to negotiate to stay up there, but did not get run over or have to move out of the way. I don't think they ever see planes that slow on routes that long flying that high.
I hadn't considered that one advantage of a PT6 is you can pull the power back and gain range. I think this has to do with the fixed compressor speed on the garrets, which just bleeds off the extra air when you pull back the power (someone please correct me if I am wrong). Also the source of the loud noise on the ground.
Post subject: Re: Maybe New Piper Offering - M700??
Posted: 09 Feb 2024, 16:03
Joined: 08/05/16 Posts: 3137 Post Likes: +2284 Company: Tack Mobile Location: KBJC
Aircraft: C441
Username Protected wrote:
Just don't get why they don't have the G3000 in that airplane. They could have had the certified by now. The $100K delta or so, isn't going to stop someone from buying it, but maybe a G1000NXI is.
Cost to develop it over a limited number of units is probably very high, but I'd bet they are working on it. Also the Nxi is a very capable system, combined with an iPad most of us carry anyways there's not much difference in capabilities. They did add the Garmin autopilot, and those videos have the older G1000.
Post subject: Re: Maybe New Piper Offering - M700??
Posted: 09 Feb 2024, 16:44
Joined: 04/20/15 Posts: 654 Post Likes: +362 Location: KFAT
Username Protected wrote:
I hadn't considered that one advantage of a PT6 is you can pull the power back and gain range. I think this has to do with the fixed compressor speed on the garrets, which just bleeds off the extra air when you pull back the power (someone please correct me if I am wrong). Also the source of the loud noise on the ground.
I think that's more airframe dependent. It's a function of engine and wing. I don't think the PT6 (alone) has much of an advantage there.
Across the board, BSFC of any -1 through -10 TPE 331 is higher than most PT6s. Usually BSFC numbers are given at their rated power but I have a hunch the same goes at lower power settings, too. 331s can sip gas if you pull back.
Even in the stubby wing MU2 you can gain range pulling back.
Post subject: Re: Maybe New Piper Offering - M700??
Posted: 09 Feb 2024, 19:38
Joined: 08/05/16 Posts: 3137 Post Likes: +2284 Company: Tack Mobile Location: KBJC
Aircraft: C441
Username Protected wrote:
I hadn't considered that one advantage of a PT6 is you can pull the power back and gain range. I think this has to do with the fixed compressor speed on the garrets, which just bleeds off the extra air when you pull back the power (someone please correct me if I am wrong). Also the source of the loud noise on the ground.
I think that's more airframe dependent. It's a function of engine and wing. I don't think the PT6 (alone) has much of an advantage there.
Across the board, BSFC of any -1 through -10 TPE 331 is higher than most PT6s. Usually BSFC numbers are given at their rated power but I have a hunch the same goes at lower power settings, too. 331s can sip gas if you pull back.
Even in the stubby wing MU2 you can gain range pulling back.
Wouldn't the drag drop significantly regardless of the airframe? Given our mpg doesn't change, that would imply the BSFC drops significantly with lower power. My understanding is the advantage of the fixed shaft is that it is more efficient at the one speed it operates at, at the expense of operating efficiently at lower power. I don't know what happens to the extra air when power is pulled back, but the compressor is still pulling the same power out of the turbine section at lower power settings (again, someone correct me if I am wrong). The original design was out of an APU as Cliff Garrett was very concerned about the liability of an aircraft engine, and let P&W get a head start on the market which they never caught up to.
The stillborn Kestrel, which I believe is just a stretched Epic, was going to have a TPE331.
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