I just checked out the Yak-9U flight time, it is better than I thought. 27 minutes roughly at 100% fuel. Are you kidding me? The F4U-1D only has 29 minutes? The F4U-4 has 21 while carrying 100 gallons more fuel.
The F4U-4 has 25 min on Emergency power (ADI) but the F4U-4 has the option of carrying one or two 150 gal DTs. At 50% and a single DT the F4U-4 has 28 min.
What the DT allows for is an 'instant' fuel dump upon entering combat. Carrying the DT while on climb out increases the combat time of the F4U-4 significantly. And that is in fact what most folks do unless the CV is close enough to a field.
I should be the one screaming.
You are but mostly about the strawmen you created.
with 50% fuel or less and zip around for the entire ride of the same or less duration but with greater performance from less fuel.
Are kidding me? That's exactly what the high FBM does now. 50% and a DT for Ami planes gives them the ability to dump fuel weight at will. There's your 'relaxed realism'. This won't change if the FBM is lowered.
Setting the FBM to 1 or 1.5 would have little affect on the F4U-4. If the FBM were at 1 or 1.5 folks may or may not give up the DT and keep their 50 or 75% fuel. However, the F4U-4 doesn't instantly gain 10000lbs of weight because the FBM is lower. That plane, like all others, would still have the same options to take 25, 50, 75% fuel as the player sees fit. The Yak 9u doesn't miraculously get lighter if the FBM is lower either. In fact with a higher FBM you fight the Yak at lower weight, due to higher fuel consumption, then you would if the FBM was set at 1.
An F4U-4 taking 75% gets a far better 'weight savings' then a Yak taking 75%. Assuming the Yak will always take 50% if the FBM is at x1 while the F4U pilot will be stuck with 100% is ridiculous, as Squire said players aren't stupid. No one forces you to take-off with 100% fuel and no one forces you to take-off from the closest airfields. All the options would remain the same as they are now.
Your right the discussions isn't just about the Yak, its about every other plane with limited flight time and range including the Yak.
Back on the 'compressed game world':
The maps in the main have 'no scale' they are just made up. Those that claim 'well the maps are only 512 x 512, what are we to do...' need to realize that maps have been made at or near a 1 to 1 scale in the past. The first BoB map was 1.1 to 1. In fact we could lay actual LW navigation/grid maps over the clipboard map and the LW grid lines almost fit with in the clipboard map grid. IIRC the FBM was 1 or 1.2 but ranges were realistic enough. The Kurland map was 512 x 512 but the scale was set to .8 or .9 to 1 with an FBM of 1. Again realistic ranges and flight times were achieved.
Because the airfields on the main maps are just 20 - 25 miles a part has nothing to do with map scale or realism. It's a game play decision, the main isn't a scenario. However, claiming that an FBM of x2 is the only way to get 'realism' is nonsense. Even on the 256 x 256 maps (4 times smaller then the 512s) the FBM wasn't higher it was actually the same or lower (1.5).