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From: "Ed Anderson" <eanderson@carolina.rr.com>
To: "Rotary motors in aircraft" <flyrotary@lancaironline.net>
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Subject: Check Temps on Climbout was e: [FlyRotary] Turbo question. 
Date: Wed, 22 Aug 2012 17:47:58 -0400
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Chris, One thing to be checking on your next take off is your coolant/oil 
temps.  As you know take-off is the worst combination of low cooling air 
mass flow and max engine temperature due to WOT.

You would be surprised how quickly (with the additional power you now have) 
you will exceed your cooling limits if not careful.  So I would be certain 
to check the temps at a frequent rate on your next take-off until you know 
how the system is going to react - hate to see you cook your engine during 
your first real Turbo climb out.

I find for my Rv-6A that I needed to get to 120 mph IAS as quick as possible 
to get on the good side of the cooling curve.  So that generally meant take 
off - get safely above surround obstructions, then level off/reduce climb 
until airspeed hit 120.  Then I could resume climb with cooling gradually 
bring the temps down as altitude and airflow increased.  Your sweet spot 
airspeed would undoubtedly be different given different platform and cooling 
set up.

Ed

--------------------------------------------------
From: "Chris Barber" <cbarber@texasattorney.net>
Sent: Monday, August 20, 2012 9:17 PM
To: "Rotary motors in aircraft" <flyrotary@lancaironline.net>
Subject: [FlyRotary] Turbo question.

> As I have mentioned I have had what I think are incongruent readings 
> regarding my manifold pressure (mp)and engine rpm. It seems I am getting 
> quite low mp as I add power to higher rpm.
>
> I am not well versed in this area but my thought is that as I add power, 
> even with slight boost (currently using a 3 lb spring in my wastegate) 
> eventually my mp should raise a bit more.
>
> Today I did some static test. I recorded engine RPM with the  turbo hooked 
> up and recorded the mp at 1000 rpm increments. Then I removed the turbo 
> plumbing from my intake and recorded the same info My results currently 
> confuse me.
>
> With the turbo hooked up I am getting
>
> RPM.   MP inches
> 2000 - 14.0
> 3000 - 15.5
> 4000 - 19.3
> 5000 - 21.6
> 5700 - 24.5 (topped out)
>
> With the turbo removed.
>
> 2000 - 15.8
> 3000 - 15.3
> 4000 - 19.7
> 5000 - 24.8
> 5833 - 29.8
>
> Is this indicative of restriction in my plumbing? Perhaps in the inter 
> cooler? A dirty air filter? A bad pop off valve or a leak not allowing the 
> air pressure getting to the intake. Or????
>
> I am uncertain what other permitters I need to check and provide. I am 
> just starting my diagnosis in my Phase One testing. I only have 1.6 hours 
> in the air so far. I value ya'll's direction and input.
>
> Heck, perhaps this is working properly but it just doesn't seem 
> right/comfortable.
>
> Thanks folks.
>
> Chris Barber
> Houston
> Velocity SE
> Rotary 13b turbo (?) :-)
>
>
>
> Sent from my iPhone 4
> --
> Homepage:  http://www.flyrotary.com/
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