ZDZ 80 RV Single
05-26-2005, 07:42 PM
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ZDZ 80 RV Single
ZDZ 80 single with a Bisson w/a pitts muffler modified with 1" exhaust pipes.
Amsoil Dominator mixed as directed at 50-1.
TNC tach, 2000' density altitude.
I don't believe that the engine is fully broken-in yet.
The RPMs with the stock 7/8" exhaust pipes were 200 rpm lower.
24x10 Bambula sq tip 6100 rpm
24x10 Bambula swept tip 6400 rpm
26x10 Menz ultra 6200 rpm
26x10 Menz std 5800 rpm
Good Luck
John
Amsoil Dominator mixed as directed at 50-1.
TNC tach, 2000' density altitude.
I don't believe that the engine is fully broken-in yet.
The RPMs with the stock 7/8" exhaust pipes were 200 rpm lower.
24x10 Bambula sq tip 6100 rpm
24x10 Bambula swept tip 6400 rpm
26x10 Menz ultra 6200 rpm
26x10 Menz std 5800 rpm
Good Luck
John
06-27-2005, 09:27 PM
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RE: ZDZ 80 RV Single
This engine really needs about 5 gallons through it before it comes alive. ZDZ actually recommends keeping the throttle below full throttle until the engine has 3 hours on it. That is difficult!
Ours (the older one has 20 gallons, the newer one probably has 7) put out around 6400-6700 on the square tip Bambula 26x10. 4300' elevation, with a KS 1030 copy header and cannister. The newer engine just keeps getting better. We basically lean them out progressively over time until they start to sag in vertical uplines, then richen just a touch and put more fuel through it.
My brother and father each have planes with the DA 100 on mufflers and the ZDZ is within 150 - 250 rpm on the same prop. Vibration levels are very similar (except the single really shakes in the 2500-3500 range), the twin probably accelerates faster.
Of course the ZDZ on a cannister is significantly quieter. I sometimes need to power up and fly closer as I can't hear the engine. I ran out of fuel once on the Giles and just about lost it since I thought it was still running. Luckily it was pointed at the runway and high enough.
Good luck. Enjoy the engine, and report back after a few more gallons...
Brett
Ours (the older one has 20 gallons, the newer one probably has 7) put out around 6400-6700 on the square tip Bambula 26x10. 4300' elevation, with a KS 1030 copy header and cannister. The newer engine just keeps getting better. We basically lean them out progressively over time until they start to sag in vertical uplines, then richen just a touch and put more fuel through it.
My brother and father each have planes with the DA 100 on mufflers and the ZDZ is within 150 - 250 rpm on the same prop. Vibration levels are very similar (except the single really shakes in the 2500-3500 range), the twin probably accelerates faster.
Of course the ZDZ on a cannister is significantly quieter. I sometimes need to power up and fly closer as I can't hear the engine. I ran out of fuel once on the Giles and just about lost it since I thought it was still running. Luckily it was pointed at the runway and high enough.
Good luck. Enjoy the engine, and report back after a few more gallons...
Brett
