Hi all,
I?ve never had a problem with oil temps or CHT?s. My typical mission profile is takeoff, climb at 110kts (CHT: 370 Oil: 200-210) level off at cruise (CHT: 320 Oil: 190) and descend to land (CHT: 300 Oil: 190).
Today however I tried doing pattern work for the first time, and my oil was getting up around 210 degrees in the pattern, and once I landed, the temps kept going up. The long downwind taxi back to the hangar yielded a shut down temp of 230 degrees F.
The temps during a long taxi at OSH got warm too, but not as quickly; I?m guessing the denser sea level air was the reason? I?m in the Mojave Desert, so field elevation is 2300? and OAT can be up to 120 in the summer. Today was about 85 degrees OAT however. I believe I have the standard Vans oil cooler, baffles, and an O-360-A1A with AFP Fuel Injection. 180HP.
Here are my questions;
1. Is it normal for an RV-8 to heat up during pattern work? I was using 25?/2500 on the takeoffs, then immediately coming back to 12? MP at pattern altitude. The oil would heat up during the takeoff, but didn?t cool back off during the rest of the pattern, so each touch and go added heat to the oil; I had to stop after #3.
2. During extended taxi?s my oil gets pretty warm. Not an issue pre-flight as I need to warm the oil anyway, but post landing the oil immediately starts climbing above 190 which is what I typically land with it at. If this is normal what optimizes cooling on the ground? I?ve heard about 1000 rpm to try and keep air through the cooler?
3. Am I just seeing normal oil temps for operating Hot / High? I ask this because on a normal mission profile I don?t have any cooling issues, just on a dedicated pattern flight. When I?m low, slow, high power.
I?ve never had a problem with oil temps or CHT?s. My typical mission profile is takeoff, climb at 110kts (CHT: 370 Oil: 200-210) level off at cruise (CHT: 320 Oil: 190) and descend to land (CHT: 300 Oil: 190).
Today however I tried doing pattern work for the first time, and my oil was getting up around 210 degrees in the pattern, and once I landed, the temps kept going up. The long downwind taxi back to the hangar yielded a shut down temp of 230 degrees F.
The temps during a long taxi at OSH got warm too, but not as quickly; I?m guessing the denser sea level air was the reason? I?m in the Mojave Desert, so field elevation is 2300? and OAT can be up to 120 in the summer. Today was about 85 degrees OAT however. I believe I have the standard Vans oil cooler, baffles, and an O-360-A1A with AFP Fuel Injection. 180HP.
Here are my questions;
1. Is it normal for an RV-8 to heat up during pattern work? I was using 25?/2500 on the takeoffs, then immediately coming back to 12? MP at pattern altitude. The oil would heat up during the takeoff, but didn?t cool back off during the rest of the pattern, so each touch and go added heat to the oil; I had to stop after #3.
2. During extended taxi?s my oil gets pretty warm. Not an issue pre-flight as I need to warm the oil anyway, but post landing the oil immediately starts climbing above 190 which is what I typically land with it at. If this is normal what optimizes cooling on the ground? I?ve heard about 1000 rpm to try and keep air through the cooler?
3. Am I just seeing normal oil temps for operating Hot / High? I ask this because on a normal mission profile I don?t have any cooling issues, just on a dedicated pattern flight. When I?m low, slow, high power.