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building a gear box for counter-rotating props in 1/72 scale

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  • Member since
    August, 2013
building a gear box for counter-rotating props in 1/72 scale
Posted by Putsie on Wednesday, September 27, 2017 9:05 AM

Hi folks,

In my never ending quest to complicate my model projects (ha..ha..) I wanted to build a counter rotating gearbox for several aircraft with counter rotating props.  I work in 1/72 scale so there isn't a lot of room.  I have the schematic, understand how it works,  but does anyone know where to purchase small gears or maybe even a ready-made gearbox ?

THX

  • Member since
    June, 2014
  • From: New Braunfels , Texas
Posted by Tanker - Builder on Wednesday, September 27, 2017 10:53 AM

Hey Guy !

You might be able to find them in very small sizes at anywhere that sells Quad and Octo copters  and Helos. T.B.

  • Member since
    August, 2013
Posted by Putsie on Thursday, September 28, 2017 1:10 PM
thx............
  • Member since
    July, 2012
  • From: Douglas AZ
Posted by littletimmy on Thursday, September 28, 2017 8:43 PM

Try Northwest shortline. They make all kinds of very tiny gears for model railroad locomotives.

You could also check out Walthers. Also a model railroad supply site.

Or..... find some cheep (broken ) watches at a flea market or garage sale, and pull some gears out of them.

 Dont worry about the thumbprint, paint it Rust , and call it "Battle Damage".

  

 

    

  • Member since
    November, 2009
  • From: Twin Cities of Minnesota
Posted by Don Stauffer on Friday, September 29, 2017 8:53 AM

There is a company called Small Parts that features hardware- mostly small fasteners, but they may have some gears.  There is the company that is an offshoot of Edmund Scientific that has some gear sets- forget the new name.  And an electronics supplier, Jameco, has a few gear sets.

Don Stauffer in Minnesota

  • Member since
    June, 2014
  • From: New Braunfels , Texas
Posted by Tanker - Builder on Monday, November 27, 2017 8:51 AM

Hey Putsie !

 Just have to chime in here again ! Have you heard of Futaba ? That's an R.C. Control company .They have servo Parts Packs to use with their servos . Maybe you could use something that . Now , Don't laugh !! LEGO has a bunch of smaller Bevel and Straight gears that might work .

 Those come mostly from their Technic sets . Any small motorized toy could have the gears you need . I don't recommend watches , because of the thinness of the gears within. 

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