This report covers:
- Help arrives
- Replaced the piston seal
- Dart gun
Today I resume the report on my Tyrolean Bugelspanner. Let’s see — I left off in December of 2013. That was just short of 10 years ago. You might want to read those first two reports to catch up.
I disassembled the Bugel into major assemblies and then left it — for many years! To be honest, it isn’t that complex inside. How much of a problem could it be to repair this airgun? Apparently, too much of one for me!
Then I appealed to reader 45Bravo/Ian McKee. He is handier than I am, and I thought it would be no problem for him to get the old gal going. And it wasn’t — sort of. More on that in a bit.
The main problem with the Bugelspanner was the piston seal. It was dirty and possibly decomposing. I saw what looked like leather chunks in the bore. Also the compression chamber needed to be cleaned, because some of the leather bits from the seal were embedded at the end of the chamber..
The Bugelspanner’s leather piston seal was dirty and starting to decompose.
Another problem was a worn out cocking lever pivot screw. To better understand that let’s look at how the Bugelspanner cocks.
The triggerguard is pulled down to cock the Bugel.
The screw that the cocking lever pivots on at the end of the piston was badly galled and worn. It needed to be replaced.
The remainder of the parts weren’t in bad condition, but the double set triggers were poorly adjusted. All parts needed cleaning and the two volute springs that make up the mainspring needed to be cleaned and lubricated.
The mainspring consists of two volute springs that meet in the middle like this.
It turns out that it matters where the two volute springs go. Spring number one goes toward the butt and number two toward the muzzle.
The volute springs fit together in the middle like this.
This spring goes toward the butt.
And this spring goes toward the muzzle.
Replaced the piston seal
After all the parts were cleaned, the decision was made to replace the piston seal.
The old leather piston seal was cleaned, but the decision was made to replace it.
The new Bugelspanner piston seal.
The assembly of the gun was done by a third party who has overhauled several Bugelspanners. During that process he made the final adjustments to put the gun into working order. He owns a couple Bugels of his own but he had never seen one like mine.
This is a dart gun, which is why I said in the Wednesday blog that I was going to give you readers reasons to love the Marksman pistol once more. The breech of the smoothbore barrel measures .25 caliber or 6.35mm but the muzzle measures 0.264-inches/6mm. Ian found that a .22-caliber dart worked okay. The front steel part was a little loose but the “feathers” in the back sealed the bore.
He brought the fixed Bugel to me last week and I shot it several times while he was here. After he left I experimented with wrapping the steel dart body with plumber’s tape to let the front of the dart fit the bore as well as the feathers on the tail. When I did that, the Buglespanner started putting dart on dart at close range (15 feet/4.5 meters). But I couldn’t use the rear sight because the sporting sight on the barrel got in the way. I removed it and look what happened.
I knocked the sporting rear sight out of its dovetail so the rear peep could see the front sight. I didn’t see the corrosion until the sight came off.
The sporting rear sight.
The rear peep sight.
Now, that’s a shot! With the darts shimmed larger in front they now go exactly where the Buglespanner is aimed.
I only wrapped the darts with tape as a proof of concept. I am searching for a more permanent fix. And the Bugelspanner has become my favorite new airgun because it is quiet, safe and accurate. The set trigger lets off with 1-2 ounces. But why should you care? You care because the Marksman 1010 pistol and all of its derivatives also shoot darts. Those are the airguns that half of you like and the other half despise.
Guys, shooting darts is fun and even safer than shooting pellets or BBs into a box of rubber mulch. BB is going to run some more reports about dart guns.
It took a decade but my Bugelspanner dart gun is back on line. The action is cleaned, adjusted and the gun now shoots as it was designed to. BB is going to have some fun!