Contemplating the purchase of a G3 SR22T w/ AC and was wondering how people use AC on the ground when it gets hot (we get a few days over 95F, rarely over 105F).
Without a lot of airspeed to cool off the engine, are there any mitigations to ensure the engine doesn’t overheat?
Thanks in advance!
Never had a prob in AZ. Though I have heard of long departure wait times in Vegas. Not sure the AC was the issue—I think was more long idling periods in hot sun.
I turn on the compressor and recirc on the ground. Have never had an issue with overheating the engine even sometimes with a 15 min hold time in Panama City, FL
I have a G3 SR22TN and fly into Vegas and Lake Havasu during the summers quite a bit and always use AC on the ground without issue. Helps, but when the temp is 110+ it’s still hot :-). Recently purchased Jet Shades so hoping that helps some.
Dallas-area resident with a Keith A/C system in an SR22-G2. I never hesitate to run the A/C on the ground and have never had a problem with cylinder temps.
Texas and Arizona use, mine struggles not with high CHT’s but oil temp. An overhauled oil cooler made a huge difference but even still just a few weeks ago it was only 95 and my oil temp started to redline with an average time from runup to sitting at the runway entrance. Ideas?
Even still glad to have it over not.
Use it like a car with a prop
Thank you all!
I’ve never had an issue with engine temps. with AC ops but I don’t push it.
On the ground while not moving I bump up the idle to 900. For all takeoffs I select AC off until top of climb. For landing it’s selected off abeam the TDZ. Leaving it off a cracked door provides enough breeze until shut down.
TQ
-22NA
Vernatherm probably is bad. Air power has them in stock for $645
I fly out of Palm Springs and Vegas alot. I really try to keep my nose in the wind, just a little, even when holding short.. its crazy what a little wind will do…
The only time I’ve ever had any concern with engine overheating was on a 115°F day in Henderson, NV. We turned the A/C off and taxied with the door open and the engine was still very warm by the time we took off. I had to do a couple of level-offs at reduced power to keep temps under control. I’m honestly not sure how much difference turning off the A/C made in that situation, but I figured every little bit would help.
My plane is an NA, so there may be a bit more heat to contend with from the T.
Very little, if any. Running the A/C while taxiing should have negligible effect on engine temps.
The A/C condenser assembly is located underneath the baggage compartment, not under the engine cowling.
Possible although that was replaced just before the oil cooler overhaul, both less than a year ago.
Yeah, I was thinking only of the marginal additional load on the engine.
Doesn’t matter how old it is. Was it (temperature) tested before installing it?