Project:Clark Trailer Mast

Amateur Radio Club hacking on the Antenna Mast into the Dark Hours of the Winter Night

30m Clark trailer mast.

Pledge

File:TrailerMastManual.pdf

Specifications

Trailer/Mast Specifications
Make	Clark Masts
Model	63/100 Trailer Mounted Mast Pictures Here
Age	Manufactured during the 1970s
Extended Height	30m (100')
Antenna Attachment	Standard Socket 24mm diameter (Currently has a pole lodged in it)
Trailer Length	5.9m
Trailer Width	1.9m
Trailer Height (with mast stowed)	1.8m
Trailer Wheel Size	185/80R15 Tyres + innertubes
Maximum Recommended Headload	11.4kgs (Over 20m extension) 27 kgs (Under 20m extension)
Maximum Safe Windspeed	16 km/h (Unguyed) 96 km/h (Guyed with middle and top guys)
Picket Radius	18m
Nett Weight (Mast + Trailer)	1,088 kgs
Time to Extend	10 mins
Time to Retract	6 mins
Engine Specifications
Compressor Make	Clark No. 2 Single Cylinder 3" Bore x 44mm Stroke
Engine Make	2hp Briggs & Stratton 4 Stroke Single Cylinder

https://docs.google.com/drawings/d/1m7stWPsxvypnEcJHj0fhJH8rFikoyqbqeej_nzJeFTo/edit?usp=sharing Link to (rough) schematics of mud guards that need to be remade

Work Required

(This is in some sort of vague order)

• Strip existing paint and rust

• Rustproofing

• Replace all seals and serviceable components
  • £165 + vat + delivery for a complete set of seals, O-rings, and grease. Need to provide measurements to Clark.

• Painting with a suitable exterior grade paint
• http://www.hammerite.co.uk/products/direct_to_rust_metal_paint_smooth_finish.jsp - Hackspace blue!
  • The original colour was Caterpillar Yellow BS G88/0668. Might be nice to get it in original condition.

• Welding/fabricating replacement parts where required, i.e. wheelarches, reflector arms

Paint Stripping

There is some Nitromore in the engine compartment and some rubber gloves in Velyks's memberbox. Directions for use:

1. Pour amount into metal bucket
2. Dab on a thick layer over painted surface so it's all covered
3. Leave for 40 mins
4. Use scrapers to scrape paint off
5. Clean brush and bucket when you're done

Try and work from the back towards the front.

ALWAYS WEAR THE SAFETY GLOVES AND CLEAN OFF ANY GUNK YOU GET ON YOUR SKIN. THIS SHIT IS NASTY

Replacement Screws

We might as well replace some of the knackered screws. Especially as we damaged some removing them.

• 3/8" BSF x 5/16" Allen Socket Screw
  • Qty: 85

• 2 BA x 9/16" Ch. Hd. Steel Screw
  • Qty: 86

• 2 BA x 1/2" Csk. Hd. Steel Screw
  • Qty: 60

Future projects

• Replace raising crank with electric motor?
• Electric start compressor engine?
• Replace petrol engine with electric motor?