Re: [CAD_CAM_EDM_DRO] Buying or CNCing some odd angle bevel gears. I'm stuck !!

Tom,
Which model of the Merlin are you building?
The reason I ask, is I am building a simplified 1/4 scale.
In the research I've done, the bevel gears are 45 deg. driven by an
idler off the crank, which also gives the reduction.

This is how thw sectioned R&R at the museum in Hamilton is done.
Could the difference be Packard-vs-Rolls, or the Mark #?

Iain
Barrie Ontario


kaynrc wrote:

>
> Hi guys. I was going to just ask where I might find some 22.5 degree
> bevel gears, so that the shafts would intersect at 45 degrees, not
> the usual 90. I would by FAR prefer to buy them, but, this is a Cad-
> Cam group, so I'll also ask what you'd do if they can't be found. IE:
> Make them with a 3 or 4 axis cnc mill?
>
> Here's the application: I'm doing a little 1/4 scale Merlin, and
> there's a vertical shaft in the back of the engine, in the wheelcase
> to be exact, and this drives a few items. The top of this shaft has a
> gear which drives 2 other gears on the end of their own shafts. These
> second shafts travel up to the rear end of the cylinder heads to
> drive the camshafts.
>
> If that sounds confusing I'll paint the simplest picture possible.
> The bottom shaft is like the bottom of a letter "Y" and the upper
> shafts, like the top part of a "y", are driven by it. The gears, of
> course, are in the middle of this acting as "glue" between the 3
> shafts. The top two shafts seem to be 90 degrees to each other, so 45
> degrees to the vertical driving shaft.