Does anyone know the difference between the Extra 260 and Extra 300? I thought it might be HP, but there must be another difference in wings or something.

There were a number of EXTRA variations starting with the 260 which had a wing placement on aprox, the thrust line
the wing moved down on the fuselage from original location along with other changes

The Extra 260 was basically a Extra 230 with a 260 HP Lycoming 540 AEIO in it. Only a few were actually built and it was never certified. They are all essentially experimental planes.
The Extra 300 is fully certified and has a 300 HP engine in it.

Upon further research, it seems like only six full scale Extra 260 were ever built. They were essentially uncertified prototypes and need a special waiver in order to fly in airshows.

Google "Walter Extra" if you want to find out info without getting a ton of model airplane hits.

Here's Walter Extra himself with the person who owned 1/6 of all the Extra 260's ever built, Patty Wagstaff.

so its mainly power?

"mainly" whatever has been done that caused the manufacturer to choose to market the suckers with a new name. Moving a horizontal tail up or down on an aerobatic design has far more significant effect on the rudder coupling response of an airplane than adding horsepower has to the flight envelope in general. For us to know the most changed things between different versions of any aircraft would take a lifetime of study.

But it's real easy to assume that when the model number matches the engine size there is a link.

The 300 had a reduced wingspan and larger ailerons than the 260 and had a 300hp engine.

Since Flugzeugbau came out with the 330 and it too has: wider-chord rudder, a larger elevator, and a powerplant producing 330 hp, And all their models seem to be named after the engine size, then that mfg appears to do just that for the numbers he chooses to plug into his model name. But there are also 330L, 300SHP, 300LPs and such.

So if you want to identify one of the Flugzeugbau Edges, just saying "Edge" isn't enough. And just saying 300 won't be either. That is, if you want to tell someone which airplane you're talking about. Because they all look pretty similar to most people.

Does all that matter? When it does, it does. When it doesn't, just call 'em what you want. But if the aerodynamic differences are what you're trying to identify, it'll probably take the whole name, letters and all, to do that.

awsome i have been thinking about that for a while now i no wikedness

simmo

About 40, off hand.