Go big or go home:
- Thread starter MTVR
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rruff
Explorer
Compared to the standard of 2mm FG skins over foam, I wonder where you believe 3/4" ply skins over 2x4s and foam are coming up short? Or compare it to popular offroad commercial campers using a frame of 1x2s stapled together. Of course the details may be lacking (don't know), but the structural components are very robust.
Very few people can honestly write/say that.
For that matter, very few people can honestly write/say, "Well, using a shipping container as the base of our camper would put us over 13'6" high, so, to remain road legal in all US states, we are building our own camper box out of plywood, lumber, foam, construction adhesive, and gallons of epoxy."
When I first "misread" this, I thought you might have attached a couple of ship figureheads.
Figurehead | History, Meaning & Symbolism
Figurehead, ornamental symbol or figure formerly placed on some prominent part of a ship, usually at the bow. A figurehead could be a religious symbol, a national emblem, or a figure symbolizing the ship’s name. The custom of decorating a vessel probably began in ancient Egypt or India, where an
www.britannica.com
charlieaarons
Explorer
I have a constructive suggestion.
Right now with your 1.271 transfer case gearing and 6:1 axles you are running your C13 at 1940 @ 60mph. Incredibly noisy, at least 15% increase in fuel consumption before considering air resistance (just due to way too high on rpm curve) and greater wear. Your engine develops peak hp at 1800 and it’s considered a good practice to ruat least 15% below that. Oshkosh claims 4.5mpg. I suspect that’s at military convoy speed, i. e <50mph.
You should look into replacing the Oshkosh 30000 with a 55000. High range 0.98, allowing ~1500 @ 60. Perfect.
Low range is 2.66 and irregardless of claims about 7.63 1st gear and 1.90 torque converter ratio, it would be a good thing. Especially with the inertial forces operating on the camper, slower is better. There’s a government rebuilt 55000 on the Oshkosh site.
I have determined as well as I can without actually looking underneath a MTVR that the TC is divorced, not bolted to the Allison a la FMTV.
Right now with your 1.271 transfer case gearing and 6:1 axles you are running your C13 at 1940 @ 60mph. Incredibly noisy, at least 15% increase in fuel consumption before considering air resistance (just due to way too high on rpm curve) and greater wear. Your engine develops peak hp at 1800 and it’s considered a good practice to ruat least 15% below that. Oshkosh claims 4.5mpg. I suspect that’s at military convoy speed, i. e <50mph.
You should look into replacing the Oshkosh 30000 with a 55000. High range 0.98, allowing ~1500 @ 60. Perfect.
Low range is 2.66 and irregardless of claims about 7.63 1st gear and 1.90 torque converter ratio, it would be a good thing. Especially with the inertial forces operating on the camper, slower is better. There’s a government rebuilt 55000 on the Oshkosh site.
I have determined as well as I can without actually looking underneath a MTVR that the TC is divorced, not bolted to the Allison a la FMTV.
Thanks, Charlie.
Yeah, the T-case is divorced, and it's a single-speed.
The engine is a C12, not a C13. The OEM tune is 425 horsepower, but I understand that there is a 540 horsepower tune available that does not increase the peak torque. I want to stay with the stock 1,550 pounds of torque, for reliability...
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charlieaarons
Explorer
If you want reliability and economy reduce rpms from 1900-2000 to 1500.
Madoxen
Active member
Hmmm i think you have gone to light with that hinge if you look in the official code of acceptable drawbridge hinges it clearly states that a minimum weight of 102.5 pounds is required for an 8 foot hinge. think you are going to have to start the whole build from scratch again ?
