Xkuzme1
Well Known Member
Seems that recently I have noticed a decrease in speed from my -4. My RV-4 used to regularly indicate about 177 indicated while in cruise (3-4000 msl). Recently it seems that the speed from my -4 has dropped off, and I am backing it up with ground speed and it has dropped too. I am averaging about 160-165 mph.
Airplane is straight, clean, and well maintained. Prop is in good shape. Gear ferings and wheel pants are straight.
I recently did the conditional. The owner/builder hadthe timing at about 28-29 degrees. We adjusted it to 25 degree btdc. It doesn't start quite the same as it used too. It used to start in 1/2 a blade. Now it starts in 3/4 to 1 bade, but still runs like a sewing machine. That's the only thing I could possible think of. Doesn't seem like timing should be the culprit.
Any ideas?
X
O-320
Sensenich metal prop
Carburetor
BOW 1030
Airplane is straight, clean, and well maintained. Prop is in good shape. Gear ferings and wheel pants are straight.
I recently did the conditional. The owner/builder hadthe timing at about 28-29 degrees. We adjusted it to 25 degree btdc. It doesn't start quite the same as it used too. It used to start in 1/2 a blade. Now it starts in 3/4 to 1 bade, but still runs like a sewing machine. That's the only thing I could possible think of. Doesn't seem like timing should be the culprit.
Any ideas?
X
O-320
Sensenich metal prop
Carburetor
BOW 1030
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