1958 Mobile Scout

Cool project - looks like you're doing great work. They may not be Hehr but they are very similar. Are the side channels exactly the same as the top and bottom? On the Hehr's the side channels are very shallow and sharp T shapes where a fiber/plastic strip slides in and it holds the felt outside the channel. The top and bottom are fat T shapes kinda like your /_\ ... Maybe the felt wore off yours over the years and just left the strip?

If this guy does not have what you need it probably does not exist. Very helpful and will send samples and give advice - he answers the phone too.

www.vintagetrailergaskets.com/

I'll make sure and measure closely.  Dial caliper will help.  Cross my fingers with vintage trailer supply or trailer gaskets.
I think it's surprising the amount of information on Hehr and possibly Parlyn (airstream) windows, but really not much else.  I did find a name "Superior, Ft.Worth" on one of the handles for the 2pane awning windows.  Mobile Scout was made in Arlington Tx, and Fort Worth is right there too, so who knows who was in with who for supplies.

The thicker walls were a result of a couple things. The originals were 3 /4 thick. The original tires were 165-R15. I measured the wheel wells, and figured the width of different tires, and determined that 205-R15 would fit fine. 165 = 6.5”wide, 205 = 7.75”wide. Drove 2hrs back up to put the new tires on, put braces in, reinforce some areas and bring it home. First thing, the tires wouldn’t go on – not enough clearance not with the wheel well, but between the axle bearing cap and the siding trim. Dang. What to do. Luckily I was to be replacing the siding, so made room and put them on.

The build thinking went:

How can I fit these tires. If I’m out on the road with a flat, 205s would be easy to source, 165s not so much.

Most of the walls were 1x4 boards. I built directly over them as a pattern.

Existing wall members, 3/ 4 x 3.5 = 3sqin

New wall members, 1.625 x 1.5 = 2.43sqin = net loss

I could buy 2x12 clear doug fir lumber and rip it to 1.625” strips for a straight, strong, stable, medium weight framework.

The ends are 1/ 2 ply ACX sand witch (.453 x 2 with center 3/4 x 1 sticks to make a hollow core, 1.625 overall). Overall weight grew a little over 3/ 4 boards= net gain.

The wheels 205-R15 now fit since I left the wheel well areas at 3/ 4.

I could now put 1.5foam insulation sheeting in the walls. SC heat and Wisconsin cold spring and fall come to mind.

The jalousie windows will fit up to a 1.875 wall. The thinner windows will be recessed some.

Unfortunately, I have way too many irons in the fire. I never was able to figure out which seal would work the best. It needs to be revisited. Covid happened and rallies got closed down and so that trailer now sits with tarp on it all the time while I try to inch forward on my Westerner. I will get back to the seals, but since it's tarped and unused, I don't need the seals replaced. I wish I could give you a better answer.

Rod

What about trimming the common Hehr side seal that has the tiny hairs sticking up with a pair of scissors by trimming it narrower? As described by PT, it slides in with hairs that stick up. Maybe Robert can send you a foot of so to try. It's worth trying to ask. He might just send it for free.

Just an idea.

Rod

I put a few things on a scale tonight, just out of curiosity:
All window glass
51lb
Iron (trailer and axle)
450lb
Wheels and tires (2)
82lb
Floor (2 layers 1/2ply)
145
Walls
164 (1-5/8, with hollow core ends)
The old walls weighed 61lb ea
The new walls weigh 83lb ea
Waiting on window seal samples from VTgaskets.
Updated photos:
www.flickr.com/gp/189563641@N05/7oe9QL
(edit: updated link)

A couple things. Since one of the double pane windows towards the back was missing, I was able to salvage a 2600 jalousie hehr as replacement from an old 60's Nomad. And rearrange somewhat to have two double panes either end of the bed, one jalousie in the back. Taking a look at the angle of the back window angle though, and the drainage angle of the hehr bottom rail threw a red flag. At what angle do jalousie windows not function well. In this case the window sill would be tilted 10deg in reverse draining to the onside - no go. We can rearrange windows, but just an observation and correction needed.
Busy mocking up a full size model, to get cabinet sizing down. And to find out stuff like the window drainage issue ahead of time.

My attempt at wheel wells. 26ga hand formed and seamed, gutter seal, 1/8 alum sheet to cover, with 3/4 alum C-channel. Butyl tape to seal the channel:
0508211612 by johnchr777, on Flickr

0508211400 by johnchr777, on Flickr

0508211400a by johnchr777, on Flickr

Laying out 9x9 tile with a checkered pattern. Cut to size on the table saw with a tight fitting blade gaurd. I needed to touch up the edges slightly with a rough file to remove any nibs. It pays to lay it all out before setting them. It seemed leave a cleaner edge on the down side, so cut with the good side down:
0519212047 by johnchr777, on Flickr

Armstrong® Flooring Standard Excelon Multicolor
Vendor Part #: FP52514031
Size: 12" x 12"
Color: Jubilee White

Vendor Part #: FP51814031
Size: 12" x 12"
Color: Pomegranate Red

Vendor Part #: FP51947031
Size: 12" x 12"
Color: Basil Green