Removable mad stab

[slopecorn]

Over 12 years in the making. Inspiration from many sources. I'm after some laser cut or 3d printed pulleys, pulley maker will be well compensated

 

[MPP]

The design is elegant, well done. How do you maintain the tight fit between the pushrod and the pulley.

 

[Flying Dutchman]

Looks cool, but what exactly is the advantage over the traditional control horn? I notice you still use one of those on the servo.

 

[MPP]

I finally noticed the string.

 

[Wayne]

We can draw something up and print them for you if you like. @RafaelAvila should be able to get it going for you. You may need to share a link for him to see more detail of what you need.

 

[RafaelAvila]

Yes @Wayne i can help him for Sure! @slopecorn let me know if you need something, i just need some more information about what exactly you might want and i can design and print on our 3d farm.

 

[slopecorn]

Sorry to burst any bubbles but I found a way to make nice pulleys without the printer with shirt buttons. Thank you for the help/offers.

Pulleys are better than horns in this case because on this plane we are trying to achieve 180° or more total travel. Using horns you run into a lot of trouble doing that. For one thing, you may not even achieve 90° in both directions because your control rod will make contact with the surface of the wing before getting there. Another problem is that once you've achieved that 90°, you might notice the holding power on that control surface is less resulting in blowback.

Pull/pull makes for other problems especially with E.P.P and is functional but lacking consistency.

 

[slopecorn]

Anyway specs for pulleys in case someone wanted to Lazer or 3d them anyway -

Outer diameter (flanges): 1" 1mm thick
Inner diameter: U.S. Nickel 2mm thick
Square hole through the center 1/4"

 

[gp49]

@slopecorn if you need to go into production on your pulleys and run out of patience building them from buttons I have a couple of them machined from Delrin and Peek. Just pm me your address and I will get them to you.

BTW, is that a picture of one of your 'older' builds? My son has been flying it off and on for a couple of years now...

Mark

 

[slopecorn]

Hi Mark,

Have you been able to test those pulleys in the field? What is driving them?

Nice work.

That is an older swiss fish I built. It should be easy to modify it with this system.