Recent content by thunderbird

AI generated drivel. Becoming an epidemic on yuutoob. The first conclusion is demonstratably wrong, since turn performance is a reflection of stall speed, and the F4U's stall speed was much lower than either of the German fighters mentioned. The other claims are also suspect. Don't believe...

Doh! Spoke too soon. I have odd, limited and inconsistent access. Two windows open? Bad! Hitting a page number link? Bad! Affecting Bing,Firefox and Chrome. Seem to have no issue accessing the site using Safari on my iphone, which brings up a thought, try one of the other installed...

Ok, i finally have access. Weird.

Anyone else having trouble accessing britmodeller.com forums? I keep getting a time out error, multiple days. Google doesn't report any current outage. I can pull up britmodeller.com, but not the forums.

The answer is complicated. As i understand it, the equations for predicting jet engine performance were available in the mid-fifties or early sixties. However, it takes quite a bit of explanation to describe what parameters are important. Engine diameter, for instance is tricky. Did one just...

You can’t. All naturally aspirated engines produce more power the denser the air is. increasing altitude always lowers the intake manifold pressure, in a way similar to closing the throttle at a given altitude pressure. its like saying, how do i get a N/A engine to produce peak power at a fifty...

Course, one can’t double the size of a wing without also considering that the wing will now weigh more. And the landing gear, fuselage, will have to be beefed up which will also increase the vehicle weight, and now maybe you need more fuel to achieve the required payload and range, which adds...

Interesting enough the designer was an Italian communist named Bartini. Bartini moved to Russia before WWII, and worked for Yermayalev or maybe Ermayalev where he designed an inverted gull, twin engined diesel motors designated YER-2 or ER-2 bomber. The YER-2 was supposedly the first to drop...

Amazing the number if people who want Nazis to win WWII. Mindboggling.

Simple answer is every plane is different. And these two planes are very different from each other. Load paths are extremely different when there are two fuselages versus one. Loads on outboard wing panels might be similar, except the wing loading is changed, and the cutout for landing gear...

Not sure why anyone is looking for ways to improve Germany’s outcome in WWII. just saying ;-)

I believe all of difference in performance was due the difference paid to excrescence drag on the P-51, or the drag caused by details. At the beginning of the war, excrescence drag was around fifty percent of the base drag. Airplane performances were far worse than what was predicted by wind...

p-38s without turbos is just another name for slow, overweight and unmaneuverable target.

The simple answer is that combat often began when planes were hundreds to thousands of yards apart. Gun attacks began at over 100 yards, and identifying one plane from another from front or aft view was truly difficult. Red colors often stick out more than darker colors at distance, so any hint...

Center of gravity relative to the average wing chord is the primary design condition for whether a plane is flyable. Its a balancing act of equipment location, consumables location and wing location and is affected by many factors. Counterintuitively, the later Griffon spitfires had a longer...