We have posted a few more photos of the upper carriage and tube to show some details that our gun has that were very important to the Confederate artillerymen who manned the original. Also there is a shot of the rear of the test rig to show it's similarity to the iron shod rails of the original.
Double D, Know this, we will take into consideration all you have written about scope use and possible flex of the bench. We appreciate your suggestions and, as time permits, will run experiments to give us enough data with which to make thoughtful improvements. What we really need from you in the next 8 or 9 months is a method of moving our new, proposed, rigid, concrete slab bench from place to place in the new Company Vehicle. Yes, it really brings tears to my eyes, but we are seriously thinking about giving the old land yacht, a '98, GMC Suburban, to my daughter. Let her buy the gas! Our new company vehicle will be a Mercedes Benz division or spin-off company product. OOOOO-AAAAH, those guys must be getting rich!!! Rolling in dough, big bucks, trips to Europe three times a year, lighting cigars with $50 bills. NO, please don't make any assumptions until you see which one we are buying. It's big enough for two large guys, one cannon and two really small suitcases, yes, it's the 'Smart for Two', 3/4 the length of the new VW Bug. Loaded down like this, I doubt it will top 65 mph, but it's a gas sipper, getting around 45 mpg, at any speed, and will allow us to continue our cross-country jaunts without going broke. So, there's your challenge; design a roof rack which will hold 300 lbs. of concrete, super-bench!
Victor3, We freely admit that we are ignorant of this technique, but it sounds like it's definitely worth trying. Anything to improve accuracy certainly gets our attention. One of the new photos posted today will show you exactly why we can't get behind the scope precisely the same way each time we aim. You must lean over the bench and the test fixture too far, AND YOU CAN'T TOUCH EITHER ONE. Because this idea is so simple, and doesn't require building something, we will try it the very next time we go shooting. Thanks!
Regards,
Mike and Tracy
This shot shows how much equipment you must lean over to sight the piece. The iron shod, white oak rails, of the chassis will have this same configuration except for total width.
Here you see proof that we ARE capable of learning new techniques. I am wrapping duct tape around the big c-clamp handles to keep the 25 lb. barbell weights from sliding off during cannon recoil like they did at the First Annual New River Valley Cannon and Mortar Open in Floyd, Virginia last summer.
More construction and hdw. details. Do you see the 1/8" gap between the front, lower edge of the upper carriage and the steel strap. This gap tapers down to nothing at a point 1/2" behind the wheel axle center. Can anyone guess the purpose of this gap? Remember, those artillerymen had to get that gun "back into battery" quickly.
You can see the important notch in the bottom end of the "brace" and a corresponding one in the horizontal "rail" of the upper carriage. The orientation of the white oak grain structure of both duplicates what the original carriages we studied have. They did NOT want a big piece of wood shearing off the rail's top upon the first discharge!!