I was doing some sketching tonight and trying to put my ideas down on paper. I have designed a lot of RC airplanes over the years and this is how I like to do it. Sheets of paper taped together and then I draw my plans using rulers, compasses and protractors. That's it. I use my computer to design the airfoils for the wings of the planes but that's it. I'm doing the same thing with my trailer.
So, I'm thinking that the basic frame will be 72" wide and 96" long and made of 11ga 2"x3" steel. I've thought long and hard about the tires but I think it best if they match my Jeep. So, 35" tires it is, mounted on 3,500 pound Timbren axles with a 4" lift. If I have smaller tires, then I'll have the added expense and weight of a spare for the trailer. If the wheels and tires match my Jeep, I can use the spare for everything. The wheels will be recessed into the body hence the raised platform inside for the queen size mattress which will be 60" wide x 80" long. The walls of the trailer will be 1.5" thick. I plan to make the box out of 1" square 16ga steel. I'll have 1" thick foam insulation inside and sheet the inside and outside in 1/4" ply. Since the inside of the trailer will be 69" wide, I'll have 4.5" wide shelves and cubbies on either side of the mattress. Good enough for shoes and little odds and ends. I'll also have a retractable 3" thick mattress shelf that pulls out for my daughter to sleep on. It's going to be about 32" wide x 67" long. I'll have it slide on heavy duty drawer slides. It will push back all the way into the rear of the trailer where the kitchen and other stuff is. The mattress will be enclosed and separated from the kitchen area. Looking at it from the outside, there will be a 5" thick shelf. Above it, I'll have a small RV microwave and then storage that can be accessed from inside or outside the trailer. Below, I'll have a pull out sink and all of the other accessories I'll need including an inverter, LP on demand water heater, water pump, external shower, etc. Under the bed, and between the wheel wells, I'll have a water tank that can hold about 70 gallons of water should I choose. Summer time only, of course. In front of that, I'll have a storage area where I can carry a small 24"x48" fold up table and a grill. I'll also have conduit for running wires for my electric brakes and tail lights, tag light, lights that I'll mount in the rear hatch, speakers, TV, electric outlets inside the trailer for plugging in phones, etc.
The trailer from the front wall to the back is 9.5' long. My tongue is another 3.5' long. I have the axle mounted about 70% of the way back when I measure from the trailer hitch to the very back of the trailer, including the part that sticks out past the frame. I've read that this is better for off road use. Also, with 35" tires and the way I have it drawn up, it's going to be about 7' tall when it's done. My Jeep currently sits at 6'3" tall. I have 15" of clearance under my Jeep. The trailer is going to have about 24" but will line up with the hitch on my Jeep just about perfectly. My garage door clearance is about 6'8" so, I'd have a problem there. I thought about making the box 6" shorter too. Inside the garage is 9' tall. I could remove the wheels and dolly it outside if I had to when I'm done building it.
If you guys could take a look at my sketches here and give me any feedback, positive or negative, I'd sure appreciate it! I want to have a good solid plan before I take on this project! Thanks!
Here's the basic frame. 2x3 11ga steel except for the tongue and angled supports which will be 2x2 11ga steel.