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From: Chris Barber <cbarber@texasattorney.net>
To: Rotary motors in aircraft <flyrotary@lancaironline.net>
Subject: Re: [FlyRotary] Check Temps on Climbout was e: [FlyRotary]
 Turboquestion.
Thread-Topic: [FlyRotary] Check Temps on Climbout was e: [FlyRotary]
 Turboquestion.
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Date: Wed, 22 Aug 2012 22:53:18 +0000
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Thanks Ed. I am pleased you verified my concern after my cooling skyrocketi=
ng yesterday when I went to full power.=20

Trying to determine where the restriction is now.=20

You are the best.=20

Sent from my iPhone 4

On Aug 22, 2012, at 4:48 PM, "Ed Anderson" <eanderson@carolina.rr.com> wrot=
e:

> 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 m=
ass flow and max engine temperature due to WOT.
>=20
> You would be surprised how quickly (with the additional power you now hav=
e) you will exceed your cooling limits if not careful.  So I would be certa=
in to check the temps at a frequent rate on your next take-off until you kn=
ow how the system is going to react - hate to see you cook your engine duri=
ng your first real Turbo climb out.
>=20
> I find for my Rv-6A that I needed to get to 120 mph IAS as quick as possi=
ble 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 cl=
imb until airspeed hit 120.  Then I could resume climb with cooling gradual=
ly bring the temps down as altitude and airflow increased.  Your sweet spot=
 airspeed would undoubtedly be different given different platform and cooli=
ng set up.
>=20
> Ed
>=20
> --------------------------------------------------
> 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.
>=20
>> As I have mentioned I have had what I think are incongruent readings reg=
arding my manifold pressure (mp)and engine rpm. It seems I am getting quite=
 low mp as I add power to higher rpm.
>>=20
>> 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) eve=
ntually my mp should raise a bit more.
>>=20
>> Today I did some static test. I recorded engine RPM with the  turbo hook=
ed 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 con=
fuse me.
>>=20
>> With the turbo hooked up I am getting
>>=20
>> RPM.   MP inches
>> 2000 - 14.0
>> 3000 - 15.5
>> 4000 - 19.3
>> 5000 - 21.6
>> 5700 - 24.5 (topped out)
>>=20
>> With the turbo removed.
>>=20
>> 2000 - 15.8
>> 3000 - 15.3
>> 4000 - 19.7
>> 5000 - 24.8
>> 5833 - 29.8
>>=20
>> Is this indicative of restriction in my plumbing? Perhaps in the inter c=
ooler? A dirty air filter? A bad pop off valve or a leak not allowing the a=
ir pressure getting to the intake. Or????
>>=20
>> I am uncertain what other permitters I need to check and provide. I am j=
ust 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.
>>=20
>> Heck, perhaps this is working properly but it just doesn't seem right/co=
mfortable.
>>=20
>> Thanks folks.
>>=20
>> Chris Barber
>> Houston
>> Velocity SE
>> Rotary 13b turbo (?) :-)
>>=20
>>=20
>>=20
>> Sent from my iPhone 4
>> --
>> Homepage:  http://www.flyrotary.com/
>> Archive and UnSub: http://mail.lancaironline.net:81/lists/flyrotary/List=
.html
>>=20
>>=20
>> -----
>> No virus found in this message.
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2
>>=20
>=20
> --
> Homepage:  http://www.flyrotary.com/
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