Plywood Seat Base

[bmetcalf]

I am putting together a long seat. From when I had my standard seat reupholstered in 1987, my recollection is that the internal stiffening angles were 1/2" on each side. Is that correct?

Also, It seems like making them longer to reach the same spot relative to the back of the seat is a good idea.

 

[Dave61]

Aluminum I used in 1965 whilst in HMD Devonport, as my original was getting a little tired and breaking up round the edges, now it's the mainstay of my pannier system.

Hi Marcus,
What thickness Aluminium did you use ?
Cheers
Dave

 

[Michael Vane-Hunt]

I used 1/4 inch alloy plate as suggested by John McDougal. Powder coated. Works well.

 

[Dave61]

I used 1/4 inch plate as suggested by John McDougal. Powder coated. Works well.

Cheers for that,
Think I'll give it a go for an extended seat.
Dave

 

[bmetcalf]

Any ideas on the dimensions of the internal stiffening angles?

 

[Michael Vane-Hunt]

On the Comet seat I did not use the angle braces. I believe John said they were not necessary. On the second seat for the twin I just got a seat kit from the Sares Co. and used that. Another benefit, you can fix the cover on properly. No more finding big tacks falling out and coming to rest on the RFM.

 

[Marcus Bowden]

1/4" of best quality admiralty aluminium made during the week, then in on Saturday mornings to get things out with a note of authority from the apprentice training centre foreman Ben Stevens, all my pannier system is mounted onto it and the last hole on each side of the footrest plates, note angle of support tubes is the same as rear lifting handle and old seat stays still being utilised as dampers which was well used in NZ when Armstrong damper failed, what a side stand too, a pad that would not sink into a fresh Cow pad with a pin locking it into position and rear stand that my 80 + year old wife can use to put me and all the luggage secure with me of cause using front brake and body jerks, then able to climb off when all is safely secured.
Things we think of so we can still use them although not yet strong enough to take it off the side stand.

 

[davidd]

I did not take dimensions when I did this seat, but the photos should be of some use.

You may notice in the full seat base photos that four of the nuts are painted black. They are SS nuts tacked on to the angle. I did this for the four nuts that accept the bolts for the tool box mount. It seemed to me that you did not want these nuts floating free inside the seat as the might not line up easily if you remount or change the toolbox.

I make sure the foam sits flat because it makes it easier to cover. This seat is still in service after 20 years, so there have been no issues.

The "Feridax" was often painted on, but the medallion goes in the same place. The original "pebble" style of vinyl is difficult to find.

David

 

[bmetcalf]

Thanks, looks like 1/2” to me.

 

[davidd]

Thanks, looks like 1/2” to me.

It does to me, also.

David