Post by AndyB on Jan 9, 2004 12:25:47 GMT -5
I've had this MiG 15 for a while now;
- it's to 1/12 scale and goes OK in good lift, but it's not the most streamlined PSS model you're ever likely to see; it can best be described as, well, shall we say "slightly corpulent".
The intake lip has a radius of about 2 - 2.5 mm which might be a bit sharp for scale (it's difficult to tell), but I wondered if it was producing more drag than a flat plate right at the nose.
I've just tried it at the Beacon in about 30 mph [note 1] and am pleased to report that a flat-plate instead of am intake lip does seem to make a difference. With a transparent plastic disc taped over the intake (same diameter so the edges were still rounded), it seemed to accelerate noticably quicker, fly faster, zoom higher and roll quicker - and I could be wrong but it also seemed that the directional stability was improved as well.
So, there you have it; if you have a PSS jet, it might fly better with a fairing (even a flat plate) over the intake.
A.
Note 1. - had to go part-way down the hill to launch, then put the transmitter down, get down on one knee, launch two-handed well nose-down, then scrabble about in the grass for the transmitter...
- it's to 1/12 scale and goes OK in good lift, but it's not the most streamlined PSS model you're ever likely to see; it can best be described as, well, shall we say "slightly corpulent".
The intake lip has a radius of about 2 - 2.5 mm which might be a bit sharp for scale (it's difficult to tell), but I wondered if it was producing more drag than a flat plate right at the nose.
I've just tried it at the Beacon in about 30 mph [note 1] and am pleased to report that a flat-plate instead of am intake lip does seem to make a difference. With a transparent plastic disc taped over the intake (same diameter so the edges were still rounded), it seemed to accelerate noticably quicker, fly faster, zoom higher and roll quicker - and I could be wrong but it also seemed that the directional stability was improved as well.
So, there you have it; if you have a PSS jet, it might fly better with a fairing (even a flat plate) over the intake.
A.
Note 1. - had to go part-way down the hill to launch, then put the transmitter down, get down on one knee, launch two-handed well nose-down, then scrabble about in the grass for the transmitter...
) - hence increasing the wing loading in the abundant lift and benefitting from the increase in inertia. The model flew faster and characteristics improved no end through the increase in kinetic energy.