Elevator Servo in Exhaust Path
08-21-2009 | 01:30 PM
#1
Thread Starter
My Feedback: (15)
Elevator Servo in Exhaust Path
What are you guy's doing with the exhaust residue hitting your rear mounted servo's. I would think only one side is affected. I understand exhaust routed away from the fuse, etc., if this is done. Encase in miniature plastic baggie ? I had built a small half barrel type of piece to cover the front of the servo, epoxied to the fuse, but took it off, may screw things up back there with wind resistance? Any suggestion's appreciated.
Crank
Crank
08-21-2009 | 03:09 PM
#2
RE: Elevator Servo in Exhaust Path
Crank,
When you make a hatch (drop form?) over the outside part of the servo then it has less resistance (drag) than without. It is also a solution to keep them dry when it rains.
Try to make the angle of the backside less than 10 degrees (related to the surface of the fuselage) to prevent turbulence, better is 8 degrees. (angle x).
Of course you make the left and right side of the fuselage the same! Both side need the hatch.
Remove the unused lever of the servo then you can make the hatch as small as possible.
I prefere the servo's in the centre section of the fuselage so I cannot give examples with pictures,
The hatch also protects the servo for FOD, that's why I prefere the servo's in the fuselage and most of the linking !!!!!
Cees
When you make a hatch (drop form?) over the outside part of the servo then it has less resistance (drag) than without. It is also a solution to keep them dry when it rains.
Try to make the angle of the backside less than 10 degrees (related to the surface of the fuselage) to prevent turbulence, better is 8 degrees. (angle x).
Of course you make the left and right side of the fuselage the same! Both side need the hatch.
Remove the unused lever of the servo then you can make the hatch as small as possible.
I prefere the servo's in the centre section of the fuselage so I cannot give examples with pictures,
The hatch also protects the servo for FOD, that's why I prefere the servo's in the fuselage and most of the linking !!!!!
Cees
08-21-2009 | 03:44 PM
#3
My Feedback: (8)
RE: Elevator Servo in Exhaust Path
I think Taurus Flyer has the right idea for you. You can make a wooden plug exactly the size of your servo that you need to cover and then just form it like you would a canopy. I make "hatch covers" for all of my external servos with only the servo arm exposed to the air. Since your servos are in the fuselage airstream, I think his suggestion is very workable.
Dan
Carolina Custom Aircraft
Dan
Carolina Custom Aircraft
08-21-2009 | 04:47 PM
#4
Thread Starter
My Feedback: (15)
RE: Elevator Servo in Exhaust Path
Thanks Dan, Taurus Flyer - Good idea. I only have one side for this position. Exhaust is letting a little oil on the servo, I carefully wipe it off with alcohol at the affected area. I will get something done, and post a picture.
Vince
Vince
08-21-2009 | 05:02 PM
#5
RE: Elevator Servo in Exhaust Path
ORIGINAL: crankpin
Thanks Dan, Taurus Flyer - Good idea. I only have one side for this position. Exhaust is letting a little oil on the servo, I carefully wipe it off with alcohol at the affected area. I will get something done, and post a picture.
Vince
Thanks Dan, Taurus Flyer - Good idea. I only have one side for this position. Exhaust is letting a little oil on the servo, I carefully wipe it off with alcohol at the affected area. I will get something done, and post a picture.
Vince
I did tell you, you are going to do both sides!!
It isn't only the oil!. It is also drag and FOD I did tell you and third less important fact is the oil.
LOL (I am a perfectionist)
Even it is not possible to make the angle 10 degrees, it always better to have the protection.
We like to see the pictures, success.
Cees
