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17 Aug 2022, 12:13 [ UTC - 5; DST ]


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 Post subject: Re: Flying the TBM 850
PostPosted: 14 Dec 2021, 07:46 
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Username Protected wrote:
Also I notice on Steveo TBM850 vids the fuel pump is incredibly loud when he turns it on?

Just seemed strange. I have about 4500hrs sitting between PT6s and the Twotter and Bandit fuel pumps were inaudible in the cockpit.


Electric fuel pump is on manual for the start, then gets switched to auto. In auto mode it will never turn on unless the mechanical pump pressure drops below 10 psi.

My guess is on a twin the pump just as loud but far enough away you don't hear it.


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 Post subject: Re: Flying the TBM 850
PostPosted: 14 Dec 2021, 07:54 
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Username Protected wrote:
Is there a way to adjust the prop RPM in the 930 or is it just a scheduled thing with the single power lever set up?


Prop stays at 2000 rpm unless feathered. The 900's have a sideways throttle gate for condition mode, first position is feather then hi idle, low idle, cutoff.

In the 700/850 there is no reason to bring prop back from 2000 rpm except for reduced noise. I don't know anyone that does that, most just leave it at 2000 until feather at shutdown.


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 Post subject: Re: Flying the TBM 850
PostPosted: 14 Dec 2021, 11:24 
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Username Protected wrote:
In the 700/850 there is no reason to bring prop back from 2000 rpm except for reduced noise. I don't know anyone that does that, most just leave it at 2000 until feather at shutdown.

To me (and my passengers) it sounds like a different noise, not reduced noise. Lower pitch, not lower volume, but that might just be my perception as I have not tried to measure it yet. Does it matter if it is a 4 or 5 blade prop?


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 Post subject: Re: Flying the TBM 850
PostPosted: 14 Dec 2021, 13:06 
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Username Protected wrote:
In the 700/850 there is no reason to bring prop back from 2000 rpm except for reduced noise. I don't know anyone that does that, most just leave it at 2000 until feather at shutdown.

To me (and my passengers) it sounds like a different noise, not reduced noise. Lower pitch, not lower volume, but that might just be my perception as I have not tried to measure it yet. Does it matter if it is a 4 or 5 blade prop?


I have brought the Prop RPM back in the 850 to 1700 to see if if was noticeably quieter-- it was not. it was just a lower frequency. and it gave up about 7 knots. so I leave it at 2000.

the fuel pump noise, as mentioned, is only during start. it's a Weldon fuel pump- similar to what's in an A36 IIRC.
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 Post subject: Re: Flying the TBM 850
PostPosted: 14 Dec 2021, 13:10 
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Username Protected wrote:
P-51 was used to Uber the pilots up to Groton to retrieve the TBM after the annual.
Comments was the TBM climbed better but the 51 was faster at cruise.
Not the norm to see the Mustang and TBM come over in formation and make the break overhead.
Attachment:
97C84C28-7FB4-4F22-9670-2396E9A51605.jpeg



first of all- badass picture. seriously cool

second- if you've actually done the overhead in the TBM please tell me what numbers you've used (airspeed and power settings)? I've messed around with it a bit, but have never really nailed down the power setting after the break (usually end up too high in the downwind).

from the 180 it's easy- about 27% power around the corner, then 8-10% on short final seems to work to get me at 87-90 over the numbers. I always try to land with >5% power- makes a much smoother landing. The TBM will show you if you suck at landing; it's STIFF.

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 Post subject: Re: Flying the TBM 850
PostPosted: 14 Dec 2021, 20:12 
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Username Protected wrote:
P-51 was used to Uber the pilots up to Groton to retrieve the TBM after the annual.
Comments was the TBM climbed better but the 51 was faster at cruise.
Not the norm to see the Mustang and TBM come over in formation and make the break overhead.
Attachment:
97C84C28-7FB4-4F22-9670-2396E9A51605.jpeg



first of all- badass picture. seriously cool

second- if you've actually done the overhead in the TBM please tell me what numbers you've used (airspeed and power settings)? I've messed around with it a bit, but have never really nailed down the power setting after the break (usually end up too high in the downwind).

from the 180 it's easy- about 27% power around the corner, then 8-10% on short final seems to work to get me at 87-90 over the numbers. I always try to land with >5% power- makes a much smoother landing. The TBM will show you if you suck at landing; it's STIFF.

I'll ask Jim about the numbers on the Overhead.
FWIW- these 2 pilots probably have more than 6K hrs in the Mustang combined. They have been flying together since the early 90s.
In this video done back in 09 at Duxford, UK, Jim, who is flying the TBM in the photo I posted, is flying lead with the Yellow nose. Ed, who is flying Bald Eagle in the photo I posted, is left wing in BBD with Black and White nose.
http://youtu.be/m8TmyiHwiw8

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 Post subject: Re: Flying the TBM 850
PostPosted: 15 Dec 2021, 22:58 
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Great Video Thanks!


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 Post subject: Re: Flying the TBM 850
PostPosted: 16 Dec 2021, 07:33 
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Thanks for posting Rich. As they said in the video, they were doing this for a show but in real life in the war some never got to come back.


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 Post subject: Re: Flying the TBM 850
PostPosted: 17 Dec 2021, 17:47 
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My last prop when I pulled back to 1900 I got a few extra knots. The one I have now does not seem to change efficiency one way or another above 1900 and loses below. I cannot account for why.

I have ordered a 5 blade, not because the one I have now is bad but because it is a loner. They wanted 40k to OH my last prop.


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 Post subject: Re: Flying the TBM 850
PostPosted: 17 Dec 2021, 18:48 
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Thanks for posting video Rich,
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Any P-51 owner that wants to trade flights and fly in the 3rd most beautiful airplane please give me a hollR

#1: P-51
#2: SR-71
#3: P-180

Same offer goes to any SR-71 pilots

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 Post subject: Re: Flying the TBM 850
PostPosted: 31 Dec 2021, 15:11 
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Aircraft: TBM850
I had another fun conversation with ATC this week. Coming in to Tallahassee I was given the ILS 27 and about 20 miles before the IAF I hear:

TLH Approach: TBM 0MB - you are number 2 for runway 27 and you are currently going more than 10x faster than the traffic ahead.
Me: Ok, what speed do you need?
TLH Approach: The traffic is an airship on a 10 mi final doing 30kts.
Me: Wow, I can't do that but I can give you 100kias.

I probably could have beat them to the field but I wasn't in a hurry so I didn't ask.

Side note - not sure if airships are IFR capable, last reported bases before my arrival were 600 AGL.


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 Post subject: Re: Flying the TBM 850
PostPosted: 31 Dec 2021, 16:51 
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Username Protected wrote:
I had another fun conversation with ATC this week. Coming in to Tallahassee I was given the ILS 27 and about 20 miles before the IAF I hear:

TLH Approach: TBM 0MB - you are number 2 for runway 27 and you are currently going more than 10x faster than the traffic ahead.
Me: Ok, what speed do you need?
TLH Approach: The traffic is an airship on a 10 mi final doing 30kts.
Me: Wow, I can't do that but I can give you 100kias.

I probably could have beat them to the field but I wasn't in a hurry so I didn't ask.

Side note - not sure if airships are IFR capable, last reported bases before my arrival were 600 AGL.


I am constantly amazed that I can fly 250 to a 7mi final, and still cross the numbers at 90 kts. It’s nuts. And it’s not necessarily the speed (although I love that); it’s the ability to slow down in no time. We are spoiled!

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 Post subject: Re: Flying the TBM 850
PostPosted: 31 Dec 2021, 22:51 
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I am constantly amazed that I can fly 250 to a 7mi final, and still cross the numbers at 90 kts. It’s nuts. And it’s not necessarily the speed (although I love that); it’s the ability to slow down in no time. We are spoiled![/quote]

:D Spoiled, that’s a good word for it. Great machine.

Now Mark why can’t you fly your TBM at 30? :lol: :rofl: :cheers:

Enjoy guys it’s fleeting, that is, our gift of flight! Happy New Year!

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 Post subject: Re: Flying the TBM 850
PostPosted: 06 Jan 2022, 16:21 
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What is VRef on a blimp, nada?


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 Post subject: Re: Flying the TBM 850
PostPosted: 06 Jan 2022, 17:21 
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Username Protected wrote:
What is VRef on a blimp, nada?


Could be negative


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