I bet if you replaced the return spring in your Packard shutter and used the instaneous pin you could get a faster shutter speed without all this bother. The return springs are often weak.
I bet if you replaced the return spring in your Packard shutter and used the instaneous pin you could get a faster shutter speed without all this bother. The return springs are often weak.
I usually use the pin, but how do I spec that spring?
I suppose i can buy a few dozen from McMaster till I find the right one.
The 5" is the first to give me trouble like this. The spring seems fully coiled and not stretched. The whole thing is VGC low mileage.
I blame the design which is significantly different than any other Packard I have.
I recounted, I have 8. I like them, but I have one lens that could use this extra 1/2".
I'll get it.
Thanks for the advice.
Tin Can
fwiw, I've speced springs by measuring the wire gauge, diameter of the coils and the length.
I'll keep that in mind. Maybe I will load test some on my soon to be spring Dyno.Originally Posted by Jim C.
Tin Can
" spring Dyno " ?
Didn't we all test spring strength in high school by stretching them out with weights?
Which is in a sense a Spring Dyno.
Exactly. I used machines like this for decades. A nerd's delight. My company pioneered this exact tech, which is now de rigor. I taught Detroit, they needed us badly.
Tin Can
Didn't know it actually had a name.
Among the lot of instruments we use those in our Composites Engineering manufacturing facility. Randy, you would be in heaven exploring the products being made.
Wow, I get a consistent 1/30 with my pump
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