CMP seat base size?
 

For ordering foam to make CMP seats, I need a rough size of the seat base. I was guessing approx. 40x40x10 cm?

If anybody could measure one up for me that would be great as I don't have access to a CMP right now. Measurements can be rough, or at least oversized as I will be cutting to foam to size and shape anyway.

Thanks in advance!

Hi Hanno, Mine are 42 x 45 x 10 cm.

Hello Robert,

That was quick - thanks!

hmmm size depends on how big your bum is Hanno LOL :D :thup2:

"Draka interfoam" around the corner from your house?

Alex

I am at the foaming stage also.....
 

....not going made but almost.

I need to replace the saging coil springs for foam but not sure what density.

We are considering doing a sandwich of soft.... medium and hard density..... depending on price may make a few trials and drive around the back field to see which is more comfortable for the " "derriere". My coil springs tend to bottom and rattle my teeth fillings.

Also some foam will not absorb water as easily....tends to leak rain in a cab 11 !!!!!

any advice or comments based on previous expereince foaming would be appreciated.

Cheers

Bob, my seats are high density foam and I need to get out and walk around every couple of hours.

That's what I am afraid of.....
 

We need to make quite a few here at the barn.

Toying with the idea of medium density on top....about one inch (25mm)....soft in the middle for about inch the rest in harder density for the bottom....

Or maybe medium hard medium...... and forget the soft....... should be easy to cut to shape once glued into a block using the band saw..... just compress the foam between two sheets of plywood.

For the back rest I assume that one inch of medium foam would be enough.

Cheers

Sorry Bob what I was trying to say is High density only just supports me, I think that medium and light density would let you sink straight to the metal base.

Ouch !!!!!!
 

Suppose I could take some crunched up money dollar bills from my mattress and fill up the CMP seat.

Regular car seats use foam over flat steel coils.....

Are we better to rebuild the original coil spring seats with one inch of foam on top....?

Who else has been bustin' their a** on foam seats???

Cheers

Stick with the coils...
 

If you can Bob, especially in Cab 11s and 12s. I went the foam way and its only just enough.

Ok on the back.... but it aint quite enough for the backside

Seat foam
 

I have noticed that some vendors describe their foam's firmness in terms of what weight applied to a 50 sq.in. area is required to achieve 25% compression of a 4" sample rather than soft/firm. The loads stated vary from 15 up to 90 pounds (maybe a wider range?. Since this is a static load and bumps make a dynamic load (perhaps 2-3G???) I was thinking a seat base should be at least mainly the firmest foam I could find. Did any of the people with experience of foam use foam number rated in the way I described and if so, what was the Indentation Load Deflection, or ILD number? I prefer a numeric system over "soft" or "firm" as the words can mean different things to different people but a properly defined numeric system should mean the same thing in every case.

Perhaps the foam question would be one best asked of an experienced upholstery shop.

We have a number of NOS cushions at the RCA museum that are all foam. Never had to drive more than an hour on them, but the thrill of driving these vehicles negates any derriere pain.

And then there is the issue of open cell foam and closed cell foam, and the difference between the "old foam rubber" that had resilience(bounced back) and the cheap foam that collapses under load and stays collapsed. I agree with Rob's first comment. there are many types of foam rubber.
In a CMP, a person with the genetics of a Dutchman may not need thick rubber. He might much prefer a thinner cushion of superior quality. :note:

I do plan to talk with upholsterers (plural) before selecting foam. I'm thinking it would be wise if at least some of the discussions were with specialists in auto or marine upholster to get opinions on foam for use in vehicles and/or wet environments.

Airliner seat cushions are all foam and often two different layers. If you know anybody in the airline industry, particularly in maintenance, the cushions are often discarded for minor defects and can be cut and shaped to suit a vehicle.

David

Just had a sobering thought. Aircraft seat cushions? The Ukraine? They would be everywhere.
I spent my whole working life carefully looking after aircraft. To see them fail to deliver their passengers safely under any circumstances comes as a blow.

God bless victims, family and friends.

David

Has anyone ever taken an original CMP seat spring assembly to either a local upholstery shop or mattress shop to see if the springs can be replicated or replaced? Foam is not without it's own set of problems, but on the surface appears to be the cheapest route these days. However, the EWL Factor probably needs to be considered with a lot of CMP owner/operators these days regardless of which seat cushion option is selected.

David

Springs can be replicated. I know spaenur will sell you the springs in various sizes, along with the hog rings etc. In the end I guess it comes down to how accurate you want to be and how much you want to spend, and how much time you want to invest.

As to aircraft seats, you can keep them. My tailbone still hurts from the 14 hour flights from Toronto to Dubai on United Emirates. Once was the time I looked forward to flights.....not anymore. The seats feel like bricks to me.

Rob, I just returned from the U.K. W&P Revival. I flew both ways via Emirates.
Every airline tries to jamb as many beasts as it can into the stock crate. Having accepted that, I think Emirates were nice to fly with, and would recommend them. Left London about 9.00 on Thursday night, about 2 hours on the ground in Dubai, and arrived in Perth about 1.00 am Saturday morning. (this is somewhat mis leading)

Concerning Seat Springs
 

Hi All

I've always wondered how close this would be to fitting a CMP?
http://htsmall.macsautoparts.com/ass...u/64-67591.jpg

Source is MACs http://www.macsautoparts.com/early_v...t-cushion.html

Applications listed FORD TRUCK PANEL DELIVERY


1935, 1936, 1937, 1938, 1939, 1940
Wonder how we could go about get the dimensions?

Cheers Phil

Don't get me wrong....Emirates is certainly setting a new standard (or perhaps reviving the old standards) for customer comfort overall. Good meals, slippers, blinders, etc etc. But those cushions combined with the 14 hours of straight flight were murder.

Two hours in the Dubai terminal is not even enough time that you can walk from one end to another. If you are ever flying on someone else's dime I strongly recommend the hotel that is built in to the airport. Price is a little higher than what you would pay for the visa to leave the airport. For myself, after living 7 months in a 8x9 foot room in a tent, to find myself 8 hours after leaving the tent and being in all that marble and luxury made everything previous seem like it was a bad dream.

Nice find Phil - you would think it would be a close fit.

But the price :eek: for one??? :drunk:

As I said...it will depend on how much you want to spend as to how accurate you make your cushions.

It would be very expensive to outfit a C15TA, and many other of the CMPs that have multiple cushions in them at those prices.

So what goes on top of the spring base, between the cover and the spring? I have a set of NOS seat covers, and a original back cushion, I would think there is a backing that goes on top of the spring base. Anyone have details?

Attachment 79612

Seat composition
 

Ours had what appears to be kapok contained by hessian over the springs.

They were also a full cover rather than the half one you have there so were reversible.

The sprung seat makes a big difference to the driver experience - much more comfortable than foam.

Pic is upside down for some inexplicable reason!

Some of our old seats.....
 

At the Barn we have old bottom seats that have approx. 1 inch of horse hair sewn between light cotton fabric in the form of a pad..... the back rest has a cotton filled quilted pad about 3/4 in. The pattern of the back rest springs are very visible through the canvas cover. Gives a whole different meaning to "spartan" .....

Cheers