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Hi, If the idea is to heat the air to aid starting rather than running do you have room in the intake manifold to fit a glow plug? As many full size diesel engines used to have, heating intake air before it enters the cylinders, instead of inside the combustion chambers.

I think the idea was that if you don’t have any air entering the cabinet, other than the time you are actually blasting, if there is no airflow, ie a vacuum, the extraction system can’t remove any dust etc. so the idea was to not perfectly seal the cabinet, but to ensure an airflow to be...

On my cabinet, I was advised not to seal all of the seams if using a vacuum cleaner. The reasoning behind this is that unless there is air movement in the cabinet, the dust etc, won’t be sucked out properly unless you put enough air in through your gun to near enough match what your extraction...

Good job Brian. It may be worth doing an ‘electrical’ resistance test, between the insert and the head, just to make sure that the JB weld hasn’t created any potential ‘insulation’ issues?

Stainless steel doesn’t conduct heat as well as other steels. I believe it also has a higher rate of expansion than most steels and cast iron. This could potentially cause issues, i.e, possible seizures etc, if used for an i.c. engine cylinder?

So do I. Rigid frame, Dowty pneumatic telescopic front forks……..

If you make the heads out of cast iron also, you could machine a short taper on the top of the cylinder. A matching taper on the mating face of the head, then lap the two together, no gasket, seperate valve guides or seats needed either? I had a Velocette 500cc MSS in the late 60’s which had...

I’ve found for drilling or tapping hard materials, Swarfega hand cleaner or E45 skin cream works very well as a cutting lubricant. This with a slow speed and maintain pressure.

In the UK, have a look on “Frost Automotive Restoration” website. All types of paints, coatings, etc. many high temperature. Some quite expensive, but there’s just about everything you could possibly need, paints, powder coating kits, anodising kits, electroplating gear, etc. well worth a look...

Portable induction heaters are sold in the UK by “Machine Mart“.

Very nice Brian. Please don’t take this as criticism but, from a safety point of view, would it not be safer to clamp from only one side to hold the tool bit? Using two screws at 180 degrees apart could allow the tool bit to “Rock”, due to two opposing points of contact when tightened...

Chronos at Dunstable?

The cases also contain a lubricant which gets pumped around the system with the refrigerant, (To lubricate the pump). When you open up the system you will, over time, lose this, and will need to ‘Top’ up with a suitable oil. You can use a moisture separator/filter to catch this, but running a...

How about an old, small fridge/freezer compressor, the ‘canister‘ type? Virtually silent when running. You could control the output by using a ‘bleed’ valve to adjust engine speed? Doug.

I remember, many years ago, following a Commer lorry fitted with one of these engines, or similar along a back road around Cambridge. It had a broken exhaust. I only followed it for a couple of miles or so before I had the chance to overtake it. It gave me such a headache, worse than being in...

Many ”E” clips and Circlips are manufactured by ‘stamping’. This leaves one side with one square edge and one slightly rounded edge. If you fit the clip with the rounded edge towards the outside, then any load pushing against the ‘square’ side of the clip could cause the rounded edge to ride up...

Is it possible that the grooving tool for the piston ring grooves is the problem? If the tool has a ‘defect’, slight taper, etc, on the side that is cutting the lower face of the groove, but the upper face is ok, then as the piston descends, (suction), and ‘seals’ against the, (good), upper face...

Rolls Royce “Vulture” ‘X’ configuration, 24 cylinders based on two RR Peregrine engines using a common crankcase and shaft. Used on the Avro Manchester, later to become the Lancaster. Rare, only around 500 odd engines produced.

Honda‘s 6 cylinder race motorcycle engine from the 60’s? 250cc or 297cc (for the 350cc class)

Here’s a kit I bought some years ago, haven’t got around to using it yet. Bought, I think, from ”Chronos” in Dunstable.