Y'all need to man up... I've got 3 or 4 nice 11 ounce K&B 40 ABC's I could let you have cheap for hurling... Throwing that 15 must be like trying to throw a ping pong ball... more likely to throw your shoulder out from lack of any resistance than anything else.
Write your own material, son...
You could give extra points for anyone wanting to chuck the slightly less aerodynamic option with the 3 1/4 ounce muffler attached. Heck, the muffler prolly weighs about the same as the whole stinking fox15 (I'd cap the f in fox but it doesn't really deserve it.)
Thank you for your interest in The Hurl.
As mentioned here,
https://stunthanger.com/smf/open-forum/fox-15-hurl/msg490928/#msg490928 engines to be Hurled are supplied in accordance with Rule 5.0 by the Hurl Technical Standards Committee to preclude any "improvements" in the ballistic coefficient after numerous, and shall we say, "dubious" suggestions from certain multiple-time national champions who shall remain nameless.
Note that the 3 Gold commemorative edition engines ARE for award purposes only, as the gold makes them much heavier than a standard cast aluminum engine and casual calculation will indicate that the possible Hurl distance is some 50% better than a compliant engine. Not that anyone likely to win one of the commemorative engines would consider such an event, it is at least conceivable that the gold engine could be painted with dull silver paint and slipped in to a competitive event.
Note from the other thread - the Hurl Committee asked Fox to supply the special commemorative engines with the plugs *upright* for easy identification! We have other methods for detecting the modification of the engines that are used during the event to catch any wrongdoing (like jamming mud into the head fin to improve the aerodynamics on the first attempt, then chipping it out before turning the engine over to the next Hurler on the second, I will leave the, er, "inventor" of that one to remain nameless as well (but you all know who it is).
This is also the reason for the very controversial interspersed Hurl proposal - instead of two back-to-back attempts, do the Hurls in rounds. That way, the supporters claim, the engine cannot be "improved" on the first Hurl, then "de-improved" before the second throw, so that the subsequent Hurler doesn't gain the same advantage. The counter-argument is of course that this creates a race for the cheaters to line up for their attempt with a uncompetitive Hurler immediately after, so that the "improvement" wears off before a real contender comes up.
We have methods to detect any form of "deviation" (intentional or not) during the event to preserve the integrity of the competition. Obviously we cannot disclose these methods, but rest assured we will not let a few bad apples spoil the integrity, and I will just say it, the majesty, of the competition.
Brett