Quite right, Jonny. It screws with the effective cam angle royally. Here's a pic of a yellow/red CCH that wasn't so good.... Tipped out the cam angle was pretty close to normal, but not when retracted:
I have the angle measurements notated somewhere, but not sure where at the moment. Easy enough to throw a protractor on the screen if you're that interested.
Just got to the Library and saw that first pic of the tech friend.
It sure looks like one of my old friends.
Besides having a lot of my gear stolen in the late 80s,
in 1993 I had my 1982 Toyota 4x4 with a campershell stolen out of my driveway in Victorville. The Toyota was found about a week and a half later,
gutted and without the campershell. in the camper was about 2 to 3 thousand
dollars worth of climbing gear. Tech friends included.
The poster looks like he is from Massachusetts, and if it was my friendI wondered how it made it's way back to Mass. A couple of years ago I gave a bunch of gear to Trundlebums niece, Athena and wondered if maybe she had lost a piece or given one of the cams I gave her away. I talked with Trundle this morning and asked him but he says she still has all the gear.
Oh well. It's been so long since that gear was stolen there's nothing I could do about it now, but I sure wonder if it is a piece of my old gear that was stolen how it made it's way back to Mass. I bet it has a story to tell.
How did you mark your gear? The stamps on these, the characters look like factory stamps, only about 1/16 inch tall, and though a couple have W, they are followed by a 9 or a 6. If I ended up with one of yours somehow, and you can ID it, its all yours. Theives suck!
A very quick scan of the document turned up that within the 20 or so CCH Aliens I tested, effective cam angle at the limits (fully retracted/tipped out) and at the midpoint ranged from 7 degrees to 28 degrees.
Edit- Should probably point out for those not into cam design, 7 degrees means severely limited range and much higher holding force and 28 degrees has fantastic range but holding force below what typical rock-on-aluminum can support. Meaning it'll skate out *every time*. IIRC the empirical limit on typical North American rock types is ~18 degrees, with limestone and shale being much lower ~14 degrees.
Well, if you knew what cam angle each company used, you could throw a lobe up on that program and use that to help ID it. Or, at least you'd know what rock type it's built for best. And in the case of sketchball cams or home-made cams, you can at least guestimate whether the thing is even useful.
I missed this thread so I am sorry to be late.
Jonnyrig, I suspect that your Three Cam Unit (with the pink sewn sling) is an early Cable Cam #2 made by Canadian Alpine Manufacturing (David Oldridge’s second company) in 1986.