You could tell him, or........? ? ?
- Thread starter Ben
- Start date
KeithB
Resident Half Fast Machinist
Modern engineering students would never do that! They would spend three weeks making up a computer model, run a finite element analysis test, make a 3D rapid prototype model, and write three scholarly papers about the problem, all of which would have the same last sentence "more study is urgently needed..."
Bret4207
At the casting bench in the sky. RIP Bret.
20 plus years in rural law enforcement, 6 specializing in trucks and trailers. I can assure you, people not only can be that stupid, they ARE on a daily basis!!!
358156 hp
At large, whereabouts unknown.
I used to give people more credit, but now simply expect the worst, and I'm rarely disappointed. A friend of mine had one of the older small 4 door Blazers. He took it into town to pickup plywood, he had his 250 lb wife, and their two kids with him. That night he dropped by complaining about how poorly the Blazer handled the plywood. He had a 20 some inch high stack of plywood in the back with the rear seat folded down. the tailgate tied down and his kids laying on top of the plywood, and his wife in the front seat. His primary complaint was that for its GVW, the Blazer shouldn't have had the front wheels bouncing off the road whenever he hit a bump. I had to gently explain to him that the GVW includes the weight of the truck, passengers, cargo, and the gas in the tank. I added things up roughly, and he was almost a half-ton over on weight, in a 1/4 ton truck! He, his wife and kids alone pretty much topped out the Blazers GVW.
Pistolero
Well-Known Member
Let's see. 20 sheets of plywood, about 60 lbs for 3/4", so 1200 lbs, with CG just aft of the rear axle
centerline.....Wheelie-Matic if the fat lady got out of the front seat.
My old E-250 SuperWagon had a 9600 lb GVW, and empty was about 4200. Now THAT THING would
haul about anything you could put inside it. A pallet and a half of shingles? No problem.
fill it to the window levels with oak logs, no problem.
The shingles were about 3,000lbs per pallet, so 4500, just inside of the GVW.Aired up the tires to
65 psi, max on the sidewall, and off we went. Braking distances were.....different, although that beast
had giant vented rotors and 4 piston giant calipers up front. Brake pads about 2.5" by 7", so OK braking,
really. The 400 CID 2bbl knew it was working time, though.
Bill
centerline.....Wheelie-Matic if the fat lady got out of the front seat.
My old E-250 SuperWagon had a 9600 lb GVW, and empty was about 4200. Now THAT THING would
haul about anything you could put inside it. A pallet and a half of shingles? No problem.
fill it to the window levels with oak logs, no problem.
The shingles were about 3,000lbs per pallet, so 4500, just inside of the GVW.Aired up the tires to
65 psi, max on the sidewall, and off we went. Braking distances were.....different, although that beast
had giant vented rotors and 4 piston giant calipers up front. Brake pads about 2.5" by 7", so OK braking,
really. The 400 CID 2bbl knew it was working time, though.
Bill
Bret4207
At the casting bench in the sky. RIP Bret.
I had a "discussion" in a parking lot with a local college professor whose buddy had just gotten ticketed for not having tie downs meeting the FMCSR requirements. Long story short- if you have 10k of load your tiedowns must be rated for at least half that weight. There's more to it, but stick with that for now. The Prof tries to make the case that if the tie down has a binder on both sides instead of just one, that it somehow now works like a pulley system (???) and the load rating is then doubled. I just happened to have a book by a Prof of Engineering from Northwestern U with me (I read weird stuff) that discussed something of a similar nature (cranes) and only because I had a book from a guy with a Phd. after his name was I able to convince this guy that half of 10k is 5k and the 5k doesn't change even with pulleys! In this case the book verified that in a 30K lift your pulley system decreases the load on the lift motor, but the static weight is STILL 30K!!! If it hadn't been in plain English I might still be in that parking lot......
Too lazy to look for some of our pics but......
A "cherry picker",a few chain binders,lots of hydraulics,a welded adj cage.....And a few 2" 10k ratchet straps. Is SOP for "straightening" wrecked M/C frames.
The ratchet straps are an especially guarded,ace up the sleeve bit of kit,for tweaking and coercing frames back into precision alignment.
OP; so when that wheel rolls around,the amt of force due to the leverage ratio it's gonna provide through those 1 1/2" 4k straps..... the 4 wheeler parts are going flat first,till they get low enough that the bed rails then take the force. The strength of these straps is unbelievable. You don't notice it strapping equipment like you do when we're actually straightening steel and aluminum.
So,I'd give whomever a quick rundown and if that failed to make any sense? would pull out my wallet and a tape measure and ask...."care to make a small side bet"?
A "cherry picker",a few chain binders,lots of hydraulics,a welded adj cage.....And a few 2" 10k ratchet straps. Is SOP for "straightening" wrecked M/C frames.
The ratchet straps are an especially guarded,ace up the sleeve bit of kit,for tweaking and coercing frames back into precision alignment.
OP; so when that wheel rolls around,the amt of force due to the leverage ratio it's gonna provide through those 1 1/2" 4k straps..... the 4 wheeler parts are going flat first,till they get low enough that the bed rails then take the force. The strength of these straps is unbelievable. You don't notice it strapping equipment like you do when we're actually straightening steel and aluminum.
So,I'd give whomever a quick rundown and if that failed to make any sense? would pull out my wallet and a tape measure and ask...."care to make a small side bet"?
Bret4207
At the casting bench in the sky. RIP Bret.
I've seen the ratcheting metal parts of high quality 2" straps fly to pieces and the the strap not have a mark on it. In the picture above I'd say there's an even chance the frame of the ATV will fail about the same time the "spoke" on that wheel starts cutting through the strap. Either way, it's a fail!