Have you deide how you're going to enlarge the hole through the abutment for the ~ 0.010" larger air tube OD to fit? I believe engleracing used a heated piece of tubing to enlarge the seal. But an air tube made from that tubing has to help- less air can escape backwards out of the shot tube and more air can pass into the shot tube. Win-win the way I see it!The 499 barrel and the 0.173 tubing is with my brother. He had made a barrel extension and is turning a bit of one end down to 0.263, so that it will work in the RR. Also making the new "high volume air tubes. It will be a few days to get the parts back.
Hope we didn't lose him as well. He had some very good ideas.Have you deide how you're going to enlarge the hole through the abutment for the ~ 0.010" larger air tube OD to fit? I believe engleracing used a heated piece of tubing to enlarge the seal. But an air tube made from that tubing has to help- less air can escape backwards out of the shot tube and more air can pass into the shot tube. Win-win the way I see it!
Will want to keep an eye on the end of the air tube, watching for any signs of it being peened over by the impact on the BBs. I'd say to make the air tube as long as possible while still feeding reliably. That way, the end could be dressed to remove any damage more times before needing replacement. That is if wear is even an issue.
BTW, I hope we didn't lose engleracing- and he was the one who used delrin for the preload spacer...It's hell getting old!
So you won't be using the 499 funnel/collet? Does the barrel extension get turned down for use w/the RR barrel plug/front sight, or are you going to enlarge the hole in it? (I think I know the answer to this...)499 barrel extension
Cobalt, that's the same measurement method I used. I should have measured my 105 buck before disassembly for comparison. Strange indeed! I will recheck my work. I am interested in this because you and Chris USA have both achieved the elusive 400+ mv, with the single shot and no spring preload. It appears that the most important part is getting All the air down the tube.Something's weird here. I dropped a steel rod down the barrel of a RR, marked the rod. Removed it and cocked the gun, inserted and marked the rod and I'm getting exactly 2" difference between cocked and uncocked. Same results using the same method on a model 105 Buck. Isn't that strange?
Using the same method the 499 measures 2-1/8". But given the discrepancy between our measurements, I don't know how much use this will be.
The 499 does not have a dovetail. The sight mount is a pair of tabs that are formed into the stamped steel "shell" that surrounds the receiver. It can still be used for at least some sights that have a dovetail mount'
No, won't use the collet assy. The plug gets drilled/bored to fit the extension. The extension is 0.375. I wanted to use the stock loading gate. Any bigger and the bb's won't go in. Used the threaded end for the extension. Slightly shorten and recrown. The collet end will be turned to 0.260 - 0.263. Then drilled to fit the abutment. The extension is a bit long to be able to get a final length after assembly.So you won't be using the 499 funnel/collet? Does the barrel extension get turned down for use w/the RR barrel plug/front sight, or are you going to enlarge the hole in it? (I think I know the answer to this...)
Unloaded, yes. Though here is a confession! At one point, I had the measuring rod in while cocked, well... I bet you can guess where this is going. At least it wasn't pointing towards my eye! This one would put your eye out, and more. So I guess there is a way to fire arrows...Got it. Didn't consider how much more space the funnel would take up. This is gonna be a killer shooter, I can tell!
I double checked the stroke as well. You're doing this unloaded, right? Wouldn't want a BB loading itself during the measuring to be messing things up (even though a BB is larger than 3/32" but you know what I mean). But if we're both right, I want your gun! haha
After modifying my 499, I completely ran out of downward elevation using the 5899 peep sight (the one we have). So the gun shot way too high until I switched to the open sight shown above. I thought about using a red dot but I had the open sight handy, so the open sight got the nod. FWIW, the mounting tabs are not as secure as a true dovetail, so mounting anything heavy like a scope, etc. might not work too well.
Well, I just went through the entire process again. Without the firing of my measuring rod. Who knew that the safety had a purpose.1998 & 70th anniversary RR both at 2-3/32". Put the 105B back together. 2-1/32". So..... who knows. I was very careful in how my rod seated. Could there be some difference in the US production vs. Chinese. Perhaps the imports are more precise than the older US production....Eli Whitney is rolling over in his grave!HA!
I'm guessing there wasn't a chance the measuring rod was able to enter the air tube to mess up the measurement? BTW, there's an air-bolt gun out now. Expensive, though.
Well... I am using the common stock RR/1998 trigger. On the 1998, I removed the bear trap. I did bid on and win 2 more old 1938B's and a 1938 RR. More to compare! I want to play with the #25 shot tube feeder in the 1938.I measured my '70s era model 104 (originally used a removable shot tube and has a steel trigger which uses a different pivot point than the newer plastic trigger guns) and it is 2-1/8" by my measurement.
The difference in stroke could be caused by the trigger (which type are you using on the guns that have the longer stroke?). And that would be my guess here, unless the receivers are drilled differently for the trigger pivot point.
I have found more trigger types since I last posted about that. I need to get a photo of all the triggers I have so far and get them into the thread. The 'newest' trigger type is a plastic case like the current production, except no anti beartrap rack and the trigger blade is metal, not plastic. I have no idea what it came in originally; it came to me in a parts lot from GB.