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ufgatorpilot 09-09-2009 08:59 PM

Turbocharged light twin
 
I will have an opportunity to fly a turbocharged light twin this weekend. I have never flown anything turbocharged before. I have read a litte bit about it in the Airplane Flying Handbook, but if anyone has any tips they'd like to share, I'd appreciate it! Thanks in advance!

Twin Wasp 09-09-2009 09:09 PM

That red glow in the cowling at night is nothing to worry about.

USMCFLYR 09-09-2009 09:24 PM


Originally Posted by ufgatorpilot (Post 676112)
I will have an opportunity to fly a turbocharged light twin this weekend. I have never flown anything turbocharged before. I have read a litte bit about it in the Airplane Flying Handbook, but if anyone has any tips they'd like to share, I'd appreciate it! Thanks in advance!

What type of aircraft will you be flying and I hope you will take some pictures and post them.

USMCFLYR

rickair7777 09-09-2009 10:27 PM

Make sure you know how the wastegate is controlled...automatic or manual?

Expect a slight turbo lag when you go from idle to high power (but not as bad as a jet).

Let the turbo spin down and cool down at idle before you stop the engine

ufgatorpilot 09-10-2009 03:59 AM


Originally Posted by USMCFLYR (Post 676123)
What type of aircraft will you be flying and I hope you will take some pictures and post them.

It's just a turbocharged Piper Seminole that a friend has to pick up! We are going from Vegas to Spruce Creek, FL with it this weekend. I couldn't pass that one up.


Originally Posted by rickair7777 (Post 676147)
Make sure you know how the wastegate is controlled...automatic or manual?

Expect a slight turbo lag when you go from idle to high power (but not as bad as a jet).

Let the turbo spin down and cool down at idle before you stop the engine

I read about the waste gate obviously, but the AFH didn't really mention the manual/automatic issue. Another book I have did mention it, but didn't go into any great detail. If it's manual, how do you know when to use it? And is it an on/off switch so that it's either on or off, or can you open it a little or open it a lot as required?

I also read a bit about the fact that the turbocharged engine runs at higher temps than non-turbocharged and that a richer mixture would be required. Is that what you have noticed, and how you have dealt with the higher temperature issue?

And as you mentioned about letting it cool down at idle before stopping the engine, I read that you have to more carefully plan your descent so that you do not damage the engine from cooling stress. Any tips on that?

ufgatorpilot 09-10-2009 04:06 AM

And actually, I realized I have flown a turbocharged Diamond DA-42 before, but that plane does all of the thinking for you. It only has the power levers, no mixture, props, etc. Rick's comment about letting the engine cool down prior to shutdown reminded me that we had to do that in the DA-42.

esa17 09-10-2009 04:16 AM


Originally Posted by ufgatorpilot (Post 676181)
And as you mentioned about letting it cool down at idle before stopping the engine, I read that you have to more carefully plan your descent so that you do not damage the engine from cooling stress. Any tips on that?

500FPM, keep your airspeed up to keep proper airflow, power reductions in the descent to keep your temps even, and then a 3 to 5 minute cool down.

The biggest thing is the cool down. Just don't jerk the mixtures and hop out.

Turbo's aren't the boogie monster people think they are. Fly the plane like you own it and you'll probably be ok.

atlmsl 09-10-2009 06:23 AM

I second what Rick said about the lag. You can't just throw them forward and expect immediate results. Also you must control your power addition carefully so as not to overboost the engines. Just takes a little bit of finesse.

Photon 09-10-2009 06:30 AM


Originally Posted by ufgatorpilot (Post 676181)
It's just a turbocharged Piper Seminole that a friend has to pick up! We are going from Vegas to Spruce Creek, FL with it this weekend. I couldn't pass that one up.

Ahhh. That sounds like an awesome gig !

ryan1234 09-10-2009 06:43 AM

I think the PA-44-180T is a fairly rare aircraft... only like 86 ever made or something... pretty quick for a seminole!


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