Elevator Bell Crank MK
05-12-2008, 05:05 PM
#2
Join Date: May 2004
Location: Canberra,
AZ, AUSTRALIA
Posts: 122
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2 Posts
RE: Elevator Bell Crank MK
Hi,
Yes i have tried the MK bell cranks. Originally i thought they were okay.
I have now not used them for a number of years. I now prefer the DEPS system.
The reason i don't like the MK setup is, if you bump your elevator halves you can actually
knock them out of alignment. I know they are held together with a bolt but i found if you grab
either end of the bell crank you can actually twist it slightly and it will hold this new position.
Try putting 12" 2-56 rods on your elevators (just touching past the rudder), check the neutral and make
sure they track together, now twist the bell crank and you will find it has moved.
Yes the MK bell crank is a good idea, but i think it needs to be manufactured to better tolerances
Regards
Chris
Yes i have tried the MK bell cranks. Originally i thought they were okay.
I have now not used them for a number of years. I now prefer the DEPS system.
The reason i don't like the MK setup is, if you bump your elevator halves you can actually
knock them out of alignment. I know they are held together with a bolt but i found if you grab
either end of the bell crank you can actually twist it slightly and it will hold this new position.
Try putting 12" 2-56 rods on your elevators (just touching past the rudder), check the neutral and make
sure they track together, now twist the bell crank and you will find it has moved.
Yes the MK bell crank is a good idea, but i think it needs to be manufactured to better tolerances
Regards
Chris
05-12-2008, 05:25 PM
#3
My Feedback: (5)
RE: Elevator Bell Crank MK
The reason i don't like the MK setup is, if you bump your elevator halves you can actually
knock them out of alignment. I know they are held together with a bolt but i found if you grab
either end of the bell crank you can actually twist it slightly and it will hold this new position.
knock them out of alignment. I know they are held together with a bolt but i found if you grab
either end of the bell crank you can actually twist it slightly and it will hold this new position.
I had a similar experience. I found by extending the rear of the push rod and putting a bearing on it, the elevators tracked as well as the MK bellcrank. And it is easier to install and a lot cheaper.
Allan
05-12-2008, 06:59 PM
#4
RE: Elevator Bell Crank MK
How about this one?
http://www.nbengineering.net/accesories.htm
BN Models Adjustable Elevator Bell Crank Assembly
With Sealed Ball Bearings
Size: 1-1/2 to 2-5/16 inches (fuselage width)
Item Code: BN003
Price: $25.00
http://www.nbengineering.net/accesories.htm
BN Models Adjustable Elevator Bell Crank Assembly
With Sealed Ball Bearings
Size: 1-1/2 to 2-5/16 inches (fuselage width)
Item Code: BN003
Price: $25.00
