Logo
Builders' Plan Gallery  |  Hip Pocket Web Site  |  Contact Forum Admin  |  Contact Global Moderator
October 16, 2018, 10:22:05 AM *
Welcome, Guest. Please login or register.

Login with email, password and session length
 
Home Help Search Login Register
Pages: [1]   Go Down
Print
Author Topic: Free-wheeler cam?  (Read 576 times)
0 Members and 1 Guest are viewing this topic.
Rob Killick
Bronze Member
***

Kudos: 1
Offline Offline

Canada Canada

Posts: 11

Topic starter


Ignore
« on: July 12, 2018, 07:17:18 PM »

Hi,

Ive been away from modelling for a few years and recently purchased a30” F6F Hellcat, from Ozark Aviation.
The plans call for a”fee-wheeler cam” for the propeller drive. I’m not familiar on how to assemble that type of prop drive.
It looks fairly simple , but the plans don’t really give an explanation of how it
Any ideas out there ?
Thank you ,

Rob Killick
Logged
gossie
Platinum Member
******

Kudos: 48
Offline Offline

Australia Australia

Posts: 1,694



Ignore
« Reply #1 on: July 12, 2018, 10:18:43 PM »

GARAMI is the best way to free wheel a prop.
Attached files Thumbnail(s):
Re: Free-wheeler cam?
Logged
ZK-AUD
Gold Member
*****

Kudos: 36
Offline Offline

New Zealand New Zealand

Posts: 987



Ignore
« Reply #2 on: July 13, 2018, 01:45:00 AM »

Rob are you carving a balsa prop or using a plastic one?
Logged
Rob Killick
Bronze Member
***

Kudos: 1
Offline Offline

Canada Canada

Posts: 11

Topic starter


Ignore
« Reply #3 on: July 13, 2018, 11:02:40 AM »

I’m using the scale , three blade prop (stacked hub, with ply blades), supplied with the short kit.
I’ll try and supply a photo of the hub on a later post.
Logged
tom arnold
Gold Member
*****

Kudos: 24
Offline Offline

United States United States

Posts: 660


Casper Wyoming



Ignore
« Reply #4 on: July 13, 2018, 12:55:12 PM »

I am pretty sure that the term "freewheeler cam" refers to a ramp type free wheel which is the simplest to build. Imagine a lock washer glued to the face of the prop with a "L" bend in the prop shaft. The L bend rides around the lock washer and catches on the raised ramp and drives the prop. When the motor runs down, the L bend stops moving and the propeller continues to turn (freewheels) and now the L bend rides around and around continually jumping the ramp.

This type ramp is molded into all the plastic props and here is an example. Many people mount a brass tube to the face of the prop and grind in a ramp, with epoxy to hold it all together.
Attached files Thumbnail(s):
Re: Free-wheeler cam?
Logged
Rob Killick
Bronze Member
***

Kudos: 1
Offline Offline

Canada Canada

Posts: 11

Topic starter


Ignore
« Reply #5 on: July 16, 2018, 12:44:40 PM »

Hi Tom,

I received a drawing from the kit supplier and the scale prop hub uses a spring release to disengage the prop shaft from the prop hub , or spinner (depending on the hub set up).
I think I have the problem solved .
Thanks for the help , gentlemen .
Attached files Thumbnail(s):
Re: Free-wheeler cam?
Logged
Pages: [1]   Go Up
Print
Jump to:  

Powered by MySQL Powered by PHP Powered by SMF 1.1.21 | SMF © 2015, Simple Machines Valid XHTML 1.0! Valid CSS!