Andy_RR
Well-Known Member
Interesting that AC Aero's ealier AX40 and AX50 air-cooled cylinders are no longer available and there's a SB that pretty much takes them out of service...
Touche, but the point I was making is that one dead jug on an air cooled engine means less power but a good chance you still have power albeit reduced. Contrast that with a liquid cooled engine with one leak. The coolant level becomes critical and your engine seizes and you have no power. I like liquid cooled engines. They have so many redeeming qualities. Air cooled seems to be more robust.I suspect that ac-aero do not anticipate that their cylinders for the 4 and 6 cylinder Lycomings will be used in combat.
BJC
Hi,Thanks for sharing, Andi.
What is an AFM 300?
Do you have electronic ignition?
Thanks,
BJC
Thanks.Hi,
AFM 300 is a throttle manifold/fuel control unit manufactured by Airflow Performance.
I use 2 mags.
Another idea would be to extend oil cooling and have an air/oil cooled cylinder/head. So basically a larger oil cooler and some oil cooling in the heads. The cooling lines should run internally in the engine. No new medium added to the engine. You could balance the cylinders for equal and lower temperature.
Just a thought. I am not an engineer.
The SMA305-230 diesel engine does exactly that. The oil comes up the cylinder wall from the case though channels and into/out of the head. The head is a removable part, so there's a head gasket, and the early engines leaked at that spot. We did a bunch of work on one of them.Another idea would be to extend oil cooling and have an air/oil cooled cylinder/head. So basically a larger oil cooler and some oil cooling in the heads. The cooling lines should run internally in the engine. No new medium added to the engine. You could balance the cylinders for equal and lower temperature.
Thank You for leading me to SAE paper 871042.Someone posted a while back asking if the figures for the Voyager engines were ever made public?
Yes they were, there was an SAE paper written on them. You can get it there, or there's somewhere you can download it for free, although i can't remember off-hand where I got mine. They gave BSFCs better than .37 lbs/hp/hr for the Voyager 200.
Not surprising. Back in post #27 I said this:All assets are for sale.
Soon to be known as Liquidated Air Power?All assets are for sale.
For Lycos and Contis? Probably. Rotax showed that liquid cooling is not necessary for the cylinders.From what everyone is saying in this thread, it seems like aftermarket liquid-cooled cylinder heads would be the most marketable option rather than full cylinders.
Sheez, only $20K hey?Does anyone have experience with aftermarket, liquid cooled, cylinders from ac-aero? See Gladiator - AC Aero Engines
Porsche ran water cooled heads only for a while when they had to start leaning out to meet emission and mpg standards. Now fully water cooled.For Lycos and Contis? Probably. Rotax showed that liquid cooling is not necessary for the cylinders.
It would be interesting to try it on the old VW engines as well...
You mean like the Limbach L2400D series Aircraft engines from 76 kW to 125 kW. Powerful engines for high performance Aircraft engines from 56 kW to 75 kW. Fuel-efficient powerhousesFor Lycos and Contis? Probably. Rotax showed that liquid cooling is not necessary for the cylinders.
It would be interesting to try it on the old VW engines as well...