Shadrach Posted Monday at 05:13 PM Report Posted Monday at 05:13 PM 5 minutes ago, TangoTango said: Tempest URHM38S, and they now have a couple hundred hours on them. At the time they were brand new. #4 is my coolest cylinder by quite a bit, so it was hovering around the 300dF mark when I was targeting 350 on the hot cylinder. The fouling was never a problem (it always burned off with a high power runup for a minute or two) but failing a before takeoff mag check will make an impression on the passengers. I haven't failed one since increasing my target CHT. As far as moving, my summers aren't too much warmer than yours. I know there are several AZ based members here; I flew out to KCHD this May, and that was hot. That trip was the only time I couldn't maintain under 380CHT in a protracted Vy climb. #1 and #4 are my coolest. #3 is always the hottest. CHT delta is usually <30° except for when very rich or very lean and then #1 is challenging to keep warm.
EricJ Posted Monday at 05:25 PM Report Posted Monday at 05:25 PM 19 minutes ago, TangoTango said: As far as moving, my summers aren't too much warmer than yours. I know there are several AZ based members here; I flew out to KCHD this May, and that was hot. That trip was the only time I couldn't maintain under 380CHT in a protracted Vy climb. FWIW, May isn't actually very hot here by our standards. 1
Doug G Posted Monday at 08:10 PM Report Posted Monday at 08:10 PM https://savvyaviation.com/wp-content/uploads/articles_eaa/EAA_2012-12_red-box-red-fin.pdfSent from my iPhone using Tapatalk
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