Does Anyone know what S. R. means (not sherical radius)
Does Anyone know what S. R. means (not sherical radius)
(OP)
I have a drawing that is calling out S. R. and it does not refer to a sherical radius. It is on a Test Enable switch which is on a Thrust Reverse assy.
Thanks for the help in advance.
Jerry Eden
Thanks for the help in advance.
Jerry Eden





RE: Does Anyone know what S. R. means (not sherical radius)
Not much background info to go-on here. Is there a reason You are sparing details, such as...
What company? What Acft? What context?
What drafting system? Company? MIL-STD-100 (or) ASME Y14.100?
Have You checked the Abbreviation document?
IF an old drawing... are You sure it REALLY says "S.R."... not too bluurrry to be something different?
Is there a -1 [flight-crew] manual available? IT WILL explain this switch nomenclature.. dumb pilots need to know...
Regards, Wil Taylor
Trust - But Verify!
We believe to be true what we prefer to be true.
For those who believe, no proof is required; for those who cannot believe, no proof is possible.
RE: Does Anyone know what S. R. means (not sherical radius)
RE: Does Anyone know what S. R. means (not sherical radius)
The Company, Aircraft, context, Drafting system, etc is not relevant. I have been in this business for over 30 years and am an a consultanting Sr. Design Engineer. I have looked through all documentation to try and find out the meaning without success.I am attaching an env dwg of the part. I have remove any proprietary info.
Hope this helps,
Jerry
RE: Does Anyone know what S. R. means (not sherical radius)
RE: Does Anyone know what S. R. means (not sherical radius)
RE: Does Anyone know what S. R. means (not sherical radius)
-Kirby
Kirby Wilkerson
Remember, first define the problem, then solve it.
RE: Does Anyone know what S. R. means (not sherical radius)
Lisa
RE: Does Anyone know what S. R. means (not sherical radius)
The SR is just an abreviation for Senior Design Engineer. I have over 30 years experience in aerospace, aircraft, and spacecraft. I am 63 so I guess I am SR citizen also.
Jerry
RE: Does Anyone know what S. R. means (not sherical radius)
Thanks to all again. If you think of anything else just let me know.
Jerry
RE: Does Anyone know what S. R. means (not sherical radius)
In your pictorial, I do not see a cross-section where a spherical radius would be present. I see what you would expect to see on the part regardless of the what it looks like in inside the edge.
But what do I know, I have not been in the business as long as you have.
RE: Does Anyone know what S. R. means (not sherical radius)
Lisa
RE: Does Anyone know what S. R. means (not sherical radius)
just my 2c
RE: Does Anyone know what S. R. means (not sherical radius)
What kind of TR is this on? We have a lot of them in our shop and I could go look and see if this was the case.
-Kirby
Kirby Wilkerson
Remember, first define the problem, then solve it.
RE: Does Anyone know what S. R. means (not sherical radius)
RE: Does Anyone know what S. R. means (not sherical radius)
RE: Does Anyone know what S. R. means (not sherical radius)
The SR could be a local term for socket, recepticle or something like that.
There are all sorts of local names used by people in the trade for parts like this. Especially when you start mixing and matching inserts and shells.
You should be able to find all you need from this data sheet and the mil specs though.
RE: Does Anyone know what S. R. means (not sherical radius)
RE: Does Anyone know what S. R. means (not sherical radius)
RE: Does Anyone know what S. R. means (not sherical radius)
This has been a great thread and wish to again thank everyone for there help.
Jerry
RE: Does Anyone know what S. R. means (not sherical radius)
I finally found out the answer. The S.R. does mean spherical radius on the drawing. Although not per spec the S.R. meant that the spherical radius was a concave radius. This is used for feel so that it creates a "feel" so that the finger can find the switch button more easily.
Thanks again for all the help and answers.
Jerry L. Eden
Sr. Design Engineer
Hydraulics and Landing Gear
RE: Does Anyone know what S. R. means (not sherical radius)
A good example of how just one missing piece of info can cause much confusion.
"Good to know you got shoes to wear when you find the floor." - Robert Hunter