can you guys tell me what plane out there is like screaming fast with ailerons, and has any engine size between .50-.91 2-stroke engine please

Viper 500 with Jett 50 engine.

How about this classic with a Super Tigre 90 2 stoke http://www.greatplanes.com/airplanes/gpma1320.html

can a 3d plane go as fast as a pylon racing plane? if not, then why not?

They can - but not for very long

2 main reasons
3d planes have large control surfaces that have a tendency to flutter at high speeds. this usually results in mid air destruction of the airframe and is near impossible to stop.

The large control surfaces are usually way too effective so at high speeds, the slightest movement of the surface results in a change of attitude of the plane.

Also - the airfoil sections etc are not designed for speed and they tend to have a lot of drag. If you were to try and power one to go fast - it would take a HUGE motor to get a good speed.

oh, so if the control surfaces were smaller on the 3d, it would fly almost as fast the pylon racing, correct?

Probably not - 3d planes tend to have a high frontal area whereas the speed planes don't.

Get a 3d'er and look at it straight on from the front, then look at a speed model and look at it straight on from the front - you will see a lot less plane on the speed models - thin wing chord, more stramlined fuselage etc.

Two completely different machines built for two completely different purposes. Tractors don't run NASCAR.

Ive seen an advertisment for weston uk. This is a british co. that now is distributed in the us. Ive seen a video and their plane is stupid fast. 50 size plane and engine combo. wicked fast baby

Magnum R from Weston UK ...

Yea, the magnum with West .50 V1 engien is nice [sm=thumbs_up.gif]

http://www.youtube.com/watch?v=C9PxFc2XJ3E

I second that. Those Q500s are built for speed. Actually, that might be a fun plane for the OS Wankel.
I bought a similar one already built, but it has a bizarre ring style engine mounting system. I couldn't figure out how to install the engine.

Voodoo.

Hi Orenda365
They mount through the backplate bolts for the motor.
It saves a lot of weight - other than some slightly longer bolts there are no additional bits like an engine mount to worry about.

Little Toni from Great Planes is looks nice, I heard one clocked 120 mph with Saito 1.00 four stroke engine, but more faster with 2 stroke engine.

I used to see an ad for a plane called the Diamond Dust that claimed speeds of 175-200 mph.....I think Morris may carry it now

The Lil Tony is not that fast, seen it fly on a YS110 ... Diamond Dust is very fast with a really hot motor but its better to look for the pylon planes, the 21/25 sized ones. Maybe the MagnumR.