In car world it is ok to spray some water on radiator (especially inter-cooler) for better cooling effect. I would suggest to spray it on head, near exhaust valve.has been suggested for cooling at high power levels.
I dont think the author meant for external cooling but for internal? Ive never heard of external water injection? or spraying? Im sure its been done but again I think he meant internal injection application.Water/methanol injection was meant for internal air-fuel mixture cooling to allow bigger boost level. But not to decrease necessary external cooling.
Direct spray cooling on an industrial engine - Yes. Decades ago when I modified the family B+S lawn mower to run on model airplane fuel*. It worked. I'm just lucky I didn't loose a couple of feet.Have you done it?
How would you do it?
Thank you for article. My sorry - yes, you are able to coll engine with injected water only.. But ratio is on extreme side, and you have to able to spray it directly on heated parts.. + proper timing.."Based on this work, several pertinent recommendations have been made: (1) utilize water
injection for short-duration, very high-output operation which would otherwise be destructive
due to thermal overload"
Yep, exactly what I had in mind! This particular study was done on diesel engines to investigate total cooling from water injection. Port injection was found to need a 3.36 ratio of water to fuel for complete engine cooling. The actual numbers will vary a bit from SI.
That study was for complete cooling. Once you run out of air cooling, you need a plan B. 50% more power than your engine can happily dissipate is going need about 1.33 as much water as fuel. At 25%, about 0.8:1. It does not have to be directed at any part. It can be simply added to induction air.Thank you for article. My sorry - yes, you are able to coll engine with injected water only.. But ratio is on extreme side, and you have to able to spray it directly on heated parts.. + proper timing..
Excerpt below from the EFI system controller from Snow products as I already posted this link but I guess some folks just dont read any of it and geared up to just be nay-sayers ALSO Im using automotive kits for reference only as its OBVIOUSLY too heavy for aircraft application, at least the pump is and Hot Wings had a suggestion to use windshield water pump as a viable option if it can produce enough pressure.An ECU controlled water injection is going to need its own ECU output. That rules out stock ECUs. Some systems measure injector pulse length and inject accordingly.
We only need water at fairly high induction velocities. I will be playing with simple 'carbs'. I don't like the weight of the car water systems.