Nope, you can't outsmart the smartypants!

GUARD #1: It's not a question of where he grips it! It's a simple
question of weight ratios! A five ounce bird could not carry a 1 pound
coconut.
ARTHUR: Well, it doesn't matter. Will you go and tell your master
that Arthur from the Court of Camelot is here.
GUARD #1: Listen, in order to maintain air-speed velocity, a swallow
needs to beat its wings 43 times every second, right?
ARTHUR: Please!
GUARD #1: Am I right?
ARTHUR: I'm not interested!
GUARD #2: It could be carried by an African swallow!
GUARD #1: Oh, yeah, an African swallow maybe, but not a European
swallow, that's my point.
GUARD #2: Oh, yeah, I agree with that...
ARTHUR: Will you ask your master if he wants to join my court
at Camelot?!

From "stupid Questions answered":
Is it an african or european swallow? ......Monty Python and the Holy Grail is almost 30 years old. The answer is cruising speed of 38 to 40 mph with a miximum speed of 48 mph.