We only have 300ft of paved, with grass run off each end. No problems with large SM hawks, SM Vipers, and several other sport jets. Also have SM F-18s, F-16s in and out without issues. I agree with RCFlyerDan. I think it depends more on the pilot and his abilities. We had one member fly an Ultra Bandit there once, but it required he nail the landing exact. Couple of practice approaches were needed to size things up, but he got it done. I admit I had a heavily loaded Cougar that I would not chance it with. But it required at least 300 feet to even get off the ground. One thing is for certain. The longer the runway is, the more of it pilots will take up. Our jet rally offers us 4500' X 150' and I can assure you guys use all of it!!!!! lol