New DA 150 cylinder head turns pink  
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New DA 150 cylinder head turns pink - 5/17/2006 9:20:21 AM   
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Posts: 360
Joined: 1/21/2004
From: BeirutBeirut, LEBANON
Status: online 		Hello guys,

I have test flown my new Carden Extra 330 powered with a new DA 150 last Sunday. I have been so relaxed with this marvelous plane that I forgot that I was running a new engine on a new airframe. Although my flying capabilities are very limited I was able to hover/torque roll for quite some time after the 3rd flight.
Back to the workshop, i had a closer look to the engine and found out that left cylinder turned into light pink color.
To my knowledge, this is a sign of overheating. One thing I failed to do is create buffeting inside cowl to cool engine.
Can someone guide me into this venture? and do you think that engine has been damaged due to this?
Appreciate all advice on this issue.
Thanks. Dany

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       Post #: 1

RE: New DA 150 cylinder head turns pink - 5/17/2006 11:48:41 AM   
as722


 

Posts: 962
Joined: 12/26/2002
From: MT Pocono, PA, ANGOLA
Status: offline 		Danny I have an engine with "pink" cylinders and was told that it was running hot by a local guy. I called Da and asked them, they asked me what was the head temp. and after I told them 160 F even on a 90F day I was told not to worry about it. The engine now has 400 flights with no problems. Call DA just in case.

Albert

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Carden Aircraft

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RE: New DA 150 cylinder head turns pink - 5/17/2006 12:26:19 PM   
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Posts: 360
Joined: 1/21/2004
From: BeirutBeirut, LEBANON
Status: online 		Albert,

Thanks much for your input. At least this is good news. But, for good order sake do you have any idea how should I proceed with buffeting inside of cowl to duct air towards cylinders especially in Hover/torque roll where you have little air around cylinder heads.

Thanks for your help.
Dany

(in reply to as722)
       Post #: 3

RE: New DA 150 cylinder head turns pink - 5/17/2006 1:32:14 PM   
bhanley


 

Posts: 442
Joined: 10/17/2002
From: Sammamish, WA, USA
Status: offline 		Dany - think you are after "baffling" inside the cowl. Do a search here on RCU and you will
find some good input. All you want to do is to mount a horizontal plate (glass covered balsa , carbon
fiber sheet, etc...) that fills the space between the bottom of the cowl opening and the front of the motor,
thus forcing air over the top of the motor and down through the cooling fins on the
cylinder heads. Not a big job.
Good luck

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       Post #: 4

RE: New DA 150 cylinder head turns pink - 5/17/2006 2:55:55 PM   
DMichael


 

Posts: 748
Joined: 11/1/2002
From: Laurel, MD, USA
Status: offline 		Dany,

I don't know about others, but I always recommend that one should not perform any manuevers such as torque rolling- manuevers that tend to make an engine run hot- engine is working hard but getting minimal cooling- until there has been several gallons of fuel through the engines. With the investment we make in these things, the care and feeding up front is critical.

I hear about people doing torque rolls on new engines - but I recommend against it until the engine has a fair amount of time on it.

Dave



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www.rcshowcase.com

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       Post #: 5

RE: New DA 150 cylinder head turns pink - 5/22/2006 12:39:40 AM   
BBW Walt



Posts: 928
Joined: 1/13/2002
From: NWest, IN, USA
Status: offline 		Contrary to who's ever belief, the pink cylinders mean nothing as far as temperature of the engine. Its normal.....I got 2, doh!! I mean"t 3 there both pinky....don't worry about it fly it.... For those who's DA's ain't pinky, look a little closer

(in reply to DMichael)
       Post #: 6

RE: New DA 150 cylinder head turns pink - 5/22/2006 2:33:07 PM   
F1race79



Posts: 604
Joined: 1/17/2002
From: Hensley, AR, USA
Status: offline 		http://www.rcshowcase.com/html/faq.html#baffles

Pink is OK........

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       Post #: 7

RE: New DA 150 cylinder head turns pink - 5/23/2006 12:55:04 AM   
vanoalex


 

Posts: 8
Joined: 3/6/2002
From: Swansea, MA, USA
Status: offline
quote:

ORIGINAL: extra 300

Hello guys,

I have test flown my new Carden Extra 330 powered with a new DA 150 last Sunday. I have been so relaxed with this marvelous plane that I forgot that I was running a new engine on a new airframe. Although my flying capabilities are very limited I was able to hover/torque roll for quite some time after the 3rd flight.
Back to the workshop, i had a closer look to the engine and found out that left cylinder turned into light pink color.
To my knowledge, this is a sign of overheating. One thing I failed to do is create buffeting inside cowl to cool engine.
Can someone guide me into this venture? and do you think that engine has been damaged due to this?
Appreciate all advice on this issue.
Thanks. Dany

http://www.cactusaviation.com/Tech/baffling.html
Dany
Check this link, the motor shouldn't turn pink after few flights, a slight discoloration is normal, it takes a lot of flights before it changes into real pink.

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       Post #: 8

RE: New DA 150 cylinder head turns pink - 5/24/2006 11:56:51 PM   
T. Bob



Posts: 1505
Joined: 2/19/2002
From: Munster, IN, USA
Status: offline 		I have a DA 100 and it's a little pink and cool in the center just how I like it.

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       Post #: 9

RE: New DA 150 cylinder head turns pink - 5/25/2006 1:27:47 AM   
OnTheEdge



Posts: 1157
Joined: 1/14/2002
From: Drums, PA, USA
Status: offline
quote:

ORIGINAL: T. Bob

I have a DA 100 and it's a little pink and cool in the center just how I like it.





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       Post #: 10

RE: New DA 150 cylinder head turns pink - 6/2/2006 8:17:27 PM   
iflyimac


 

Posts: 37
Joined: 10/25/2004
From: New Albany, OH, USA
Status: offline 		I'm sorry I haven't been on RCU recently. I just saw this forum, and decided to answer to T. Bob and say that the "pink and cool in the center DA" was just about ready to be devoured by the 3W 157ib2CSTS (LOL!)

Matthew Laine

P.S. Pity I ain't got one!

(in reply to OnTheEdge)
       Post #: 11

RE: New DA 150 cylinder head turns pink - 6/9/2006 3:22:49 AM   
JPrc


 

Posts: 379
Joined: 2/1/2002
From: BOSSIER CITY, LA, USA
Status: offline 		I love the pink stuff. It means your sh*ts running good!

Can I get a BAM! on that

(in reply to iflyimac)
       Post #: 12

RE: New DA 150 cylinder head turns pink - 6/9/2006 1:44:21 PM   
lymant3


 

Posts: 36
Joined: 3/16/2006
From: Aylett, VA, USA
Status: offline 		Dany,
You may have already resolved your baffle issues, but if not, Carden now sells a fabricated fiberglass baffle / cylinder duct for the 330 / 260 cowls. www.carden-aircraft.com

Ty

ZDZ Engines, RC Showcase

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       Post #: 13

RE: New DA 150 cylinder head turns pink - 6/9/2006 1:47:37 PM   
lymant3


 

Posts: 36
Joined: 3/16/2006
From: Aylett, VA, USA
Status: offline 		BAM

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       Post #: 14

RE: New DA 150 cylinder head turns pink - 6/9/2006 2:28:24 PM   
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