Discussion of suspension systems for 4 wheel wagons has led to ideas for using narrow packings under each W-iron. This is a return to some of the earliest recommended methods for P4. So for the benefit of the relative newcomers here are some relevant extracts from the Protofour Manual and "Prototype"
Extract from P4 Manual section 4.12 The original recommendations on wagon suspension are in this manual, find it at the Scalefour website, history pages, protofour manual.
Extract from Prototype 17, September 1977 - An alternative suspension by Keith Norgrove
Extract from Prototype 31, April 1982 - A jig for assembling W-irons by Bill Johnson.
Here is a photo sequence showing the assembly of a van suspension using some of these
ideas. The jig I made is rather simpler than Bill's, using a 10mm brass strip soldered to
a pair of W-irons to give the lateral position.
|1. Brass strip drilled with 4 guide holes for fixing bolts.|
|2. Brass strip cut to length.|
|3. Completed Jig.|
|4. Jig in place on floor for drilling.|
|5. Drilling with Pin chuck.|
|6. Rubber packing strips and W-irons prepared.|
|7. Rubber packing strips in place.|
|8. First W-iron in place|
|9. Completed suspension ready for cosmetic detailing.|
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Copyright Keith Norgrove.
Last revised: August 27, 2003