it depends. From the engines design you can see F2D engines evolution turned a bit wrong way. Perhaps you can say F2D engines are overpowered, yes it is true, ...
There's a reason why F2D engines developed in that manner. It's simply that high RPM is the logical way to develop high power given limited displacement. All...
lets focus on F2D without looking at the other classes engines, they don't develop in the same direction, they do develop on its own way as they have their own...
Even if this were true, that you could maintain the same airspeeds and performance with long stroke engines, it is not really practical. It is too drastic....
It is a myth that long stroke motors have more torque than short stroke ones. Longer stroke = smaller bore so less force for the same cylinder pressure. So...
Long stroke motors have more low end torque compare to the same displacement short stroke brothers - those ones have more torque in high rpm, that what I ...
I've flown a number of standard planes on lower power engines, Thunder Tiger, Magnum, etc. just for sport and testing. Even at 29-30 sec/10 they fly OK. If...
I suppose one should also point out Henry's tuned mufflers for RC Pylon. They've made engines for Quickee 500 and Q40 a great deal faster, at the expense of a...
"The key to keeping the noise down is the tip speed of the propeller. The usual 155mm or so propeller should be turning less than about 22,000 rpm in order to...
On Wednesday, September 01, 2010 1:29 AM , ... IMHO the tip speed of 155mm propeller on 22000rpm is about half of speed of sound (178m/s). You need 40000+...
Long Stroke or Long Rod? The Formula 1 racing guys are all running long stroke engines. They went to it because at HIGH rpms a longer stroke engine breaths...
Yaroslav, you have to keep the estimated tip speed well under Mach 1 because when the prop tip gets over Mach .5 or so parts of the prop generate supersonic...
I remember at the Chicago team trials someone, Fluker? had a 7.5 or something prop that would go supersonic when he leveled out and flew straight and level....
Phil, that can be applied to aircraft airframe travailing at transonic or subsonic speed, yes due to an airframe design the local airflow can cause local ...
I suppose one could try dismounting the motor/battery/ESC and try running the prop on the ground just to see what happens. Might as well have a dB meter at...
It looks like Jacco has found the links to the videos (there were 3! different channels,too..) that were broadcast on Dutch TV stations. The links are on his...
Found some of this at a Blokker in Amstelveen today. 10 seconds... Wonder if it's any good for building foamies. Or for quick repairs. Probably too heavy,...
http://tinyurl.com/25vhu4l My guess is that it's one of those "new" Nelson plugs with the glass seal, and the "knob" at the end of the stalk that people were...
Hi all A message from Adriano Molteni. Special price for this Nelson-type plugs. Made by OPS in Italy. If interested, write to Adriano at: adrieanto@... ...
Saw a posting on the Barton forum about this: http://streamershuttle.blogspot.com/ The kits are laser cut, with carbon tube trailing edges. They sell for $200...
Hello Everybody , The MACA 2010 Top 20 shirts will be printed in March. If you finished in the 2010 Top 20 and paid your 2010 MACA dues, one shirt will be sent...
Here's a link to a YouTube video, and a few still shots of part of our contest management system. The system consist of two parts, the scoring/stat keeper, and...
