Alb D-V aeleron control horn

[Olson]

I am building a 1/4 scale RC model Albatros D-V and cannot seem to find a good close up and/or engineering drawing of the aeleron control horn/cable connection setup. The NASM version is a D-Va with a different method of operating the aelerons. Anyone who might direct me to a source of this item will be most helpful and sincerely appreciated, thanks.............John

[Dan_San_Abbott]

Hello John:
In place of the aileron horn was four spoked wheel with a cable groove on the outer rim. The spokes were vertical and horizontal and 90 degrees to each other. The control cables were fixed to the rear of the groove. The wheel was 90 degrees to the steel tubulor spar. The cables ran forward to a pair of pulleys mounted on the rear face of the rear spar. The two cables ran toward the center of the rear spar at the center-section cutout, where there were four pulleys The cables ran down the a double pulley on the control column counter-shaft. The two ailerons were independant of each other. If a cables was severed on one side, the opposite aileron would still function. Covering the aileron cable wheels was an aluminum shroud on the top and bottom of the slot in the wing which covered about half the diameter of the wheel.
Blue skies John,
Dan-San

[Olson]

WOW, thanks for the great description of the aileron connection. And welcome back! At the risk of wearing out my welcome, do you have a ballpark figure for the diameter of the wheel? I have a fuzzy photo or two showing the shroud well enough to imitate, but not to measure..........John

[Chock]

Al

[Olson]

Chock, these drawings depict the cable arrangement in the D-Va, which is the way my kit has them. The prototype for my model is a D-V version, in which the cables were routed up to the upper plane and out along the rear spar to the aileron location. ..........John

[Chock]

Yup, but what the drawing also depicts is the fairly standard technique with pulleys on aircraft design, which is to make them as large a diameter as it is necessary in the available space, in order to avoid bending the cable too much, which causes fatigue in the wire if too tight a radius. So if you are trying to determine a pulley diameter, or routing, you know that one is large enough to not stress the wire through a bend.

Al

[Olson]

Thanks Al, point taken. One of my flying friends lost his 1/4 scale Albatros D-Va model due to failure in the complex cable/pully arrangement, which illustrates the importance of your suggestion...........John

[sheppo]

The NASM mikesh book has images on the inside of the front cover that are (from memory) of the DV components taken from the illustrated parts list- ww1 era.
I dont have the clearer copies here but I will try to did them up for you. Im off on holidays for 9 days starting wednesday arvo but will try to scan and send them to you beforehand.

Cheers
Chris