The Shop > Tools
Harrison L5 rescue
vintageandclassicrepairs:
Hi Biggles and All,
I used the little program to get the following dimensions
OD. 9.214in.
root diamater, 8.896in.
tooth depth, 0.1591in
For hobby use I think aluminium would be ok to make the gears from ???
Cheers
John
Biggles:
vtsteam, since i am new-ish at this game i need a little holding of hands at the beginning, but now i had 2 minutes with the program i seem to have got the hang of it and measured the existing gears on my lathe, compared the actual with calculated results. They seem to stack up; using 14DP, 20P gear values. One of the reasons i was hesitant is that the lathe is in store and hard to get to at the moment due to building works. :dremel:
The C47/DC3 was one of the ones i flew with Skyways at Lydd airport back in the late 70's. :thumbup:
Hi Sid_Vicious, I have been following John's YouTube for some time now, he makes me laugh. :lol: I curl up in hysterics when he starts swearing in his northern accent and manor; having said that his work and tutorials are excellent and should be given a medal for his instruction. :beer:
Vintageandclassicrepairs; Thanks for the program, the result I got are the same. Unfortunately I do not think alloy will be a good idea for turning threads, perhaps for the intermediate gear replacing the fibre it will do. But I think it would only take a slight dig in your work and you will lose the gear teeth; besides alloy is just as expensive. :thumbup:
RussellT:
--- Quote from: Biggles on January 08, 2016, 06:52:35 PM ---[ Unfortunately I do not think alloy will be a good idea for turning threads, perhaps for the intermediate gear replacing the fibre it will do. But I think it would only take a slight dig in your work and you will lose the gear teeth; besides alloy is just as expensive. :thumbup:
--- End quote ---
If there is a fibre gear in the train then I would have thought that would protect the teeth of an alloy gear. Failing that is there a shear pin anywhere.
Russell
lordedmond:
Sooner to have the ally gear fail in a crash than the gear box or WHY
As Russell has said is there a shear pin in the train , better to have a weak point that a major wreck to deal with
Just my 2 cents
Stuart
vintageandclassicrepairs:
Hi All,
Thinking back :scratch: I made a 35tooth 14DP gear for the Woodhouse & Mitchell lathe I have, probably twenty years ago now?? I made the gear from a piece of good cast iron, At the time I had no way of cutting the splined centre so filed a keyway and made up a key to fit one of the splines on the driving spindle, probably about 1/4in square or so, it has never sheared and I have done some pretty heavy cutting on the lathe
At one time I was going to make up a set of metric change wheels and I was going to make them from aluminium, another of the never get roundtuit jobs :palm:
Biggles,
In 1991there was a tall ships event on here in Cork, and there were pleasure flights from the airport on a DC3, I took my at the time 6 year old son on a flight over the harbour and South Coast
due to airport traffic we got well over twice the original planned time in the air,
I loved the experience and especially the sound of those big radial engines :clap:
Cheers
John
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