In drag racing, durability is much less important than engine efficiency for a few, frantic seconds.

In such high-performance engines, an intercooler is often mounted between turbocharger and engine inlet. This boosts the efficiency of the engine and also lessens the tendency for knocking to occur.

Bless the Australians who seem to be experts in using a heat exchanger full of dry ice cubes to perform this function.

Today’s invention elaborates on this technique by using a block of solid nitrous oxide in an insulated box. This is dropped into place just before a drag race or timed run. According to my Boy’s Own Book of Physical Constants, this should remain a solid at atmospheric pressure whilst the temperature is kept below -90 degrees C.

Instead of having metal tubes running through the box (which add weight), my approach would be to freeze the nitrous oxide with a set of smoothly bent rods in place.

When these are withdrawn, a collection of smooth channels, corresponding to streamlines, remains, so that the engine inlet flow can be subject to minimal resistance.

As hot gas passes through the block it evaporates the solid nitrous -quickly widening the channels ( a bit like a solid rocket motor) and forcing combustion-promoting gas, plus cooled air, into the cylinders.

Road safety is increasingly important to vehicle manufacturers. This is especially true as populations age, road network complexity rises and insurance charges increase.

So, before the whole automotive world descends into autonomous transport, today’s invention offers a small safety upgrade.

When someone is driving and they enter a tunnel, their eyes do an amazing job of adapting the the lower light level. Many modern tunnels help this process along by providing entry and exit lighting which is intermediate between the brightness inside and outside.

There is a general problem, though, that it takes about a second or two for eyes to adapt and at motorways speeds, this equates to around 90m…during which time your ability to read a dashboard can be badly affected (especially if you are older or tired or have vision problems)

Imagine a dashboard display which was attached to a light meter located near a driver’s eyes. The system would use GPS to be aware of eg tunnels or overpasses in the next 500m or so.

Knowing the ambient light level (and thus current state of visual adaptation), the dashboard would automatically and smoothly brighten in advance of entering any dark space…so that, on driving into it, the eyes would be fully prepared.

I’m a huge fan of potato crisps (or ‘chips,’ if you live in a country that serves something called ‘french fries’).

There is now a huge variety of flavours, although I’m not really convinced by the grandiose ‘Anglesey Sea Salt’ or ‘The Amazing Adventures of Salt & Vinegar.’ These are fried potatoes, people.

Anyway, today’s invention is to offer two-compartment crisp packs, each of which would be filled with totally different flavours and separated internally by a ziplock bag closure.

This allows more access to bolder, pre-tested taste experiments. I’ve discovered that eg ‘sour cream and chives’ goes rather well with ordinary ‘salt ‘n’ vinegar’ -especially if one of these has the ridged texture and the other is flat. You get much more emergent variety of taste and mouth-feel texture this way than if you just apply the combined flavour to one crisp.

Maybe packets could contain randomly-chosen combinations which you only discover by reading two internal labels?

People could post their favourite combinations online and the manufacturers could then use these to guide future product development.

(One of my offspring just drew my attention to this, which is related, but not quite the same).