ORIGINAL: Cyberwolf
ORIGINAL: PlaneKrazee
Cyber,
I was hoping you would be getting closer to 9000 rpm on the APC 18X6.
I'm at 300' and get 9200 on my OS 160FX. I Know I know glow engines always make more power. Heck that's why the hobby switched to glow in the first place.
I guess want comes around goes around.
Your new dle30 is on par with a new syssa 30.
Read my post again I said 18x6 W, I have 2 OS 160 FX did have three but sold one anyhow they won't come close to spinning that same prop that high at my altitude. Very slow spool up, That wide prop pulls hard even with a 6 pitch. Your not compairing apples to apples here. Which is altitude, your down on the deck there in RI and im on a mountain top, you can draw much more air and more air means more fuel, more fuel means more power and as a rule more RPM's.
Although your air density is thicker, it's no way a trade off as some like to think. Yes I could more than likly put a 18x6 APC on the engine and get it close to the 9 K your talking about, but why, it wouldn't fly the plane for beans let alone have any pullout from a hover. And doing so would just short life the engine anyway.
Hi Richard,
APC only makes a 18X6 in a W. Both of my 160fx's spin that prop @ 9200 on 10% nitro. They also turn a Mejzlik 20X6, Bolly 18X8 carbon and Bolly 16.5X10 three blade @ 7800 on 5% (all I run now for nitro) and a superquiet Jtec Dual snuffler muffler. The DLE is supposed to make peak hp around 8500. I understand for friction loss purposes you want to stay around 7000 rpm, 6500 is even better if the engine can handle that without overheating. An 18X6W will make almost as much speed and more thrust @9000 rpm as a 19X8@ 7000. Properly tuned, Zenoah engines can run 10,000 rpm without problems.