I understand speed and drag, I have 150 hp and get 205 level wide open. No wheel pants no cuffs No faired in nose gear. I will bet money he can get 235 mph or better with pants and all faired in. A KR all covered up is about as clean a plane as you can get.
--- Colin Rainey <brokerpi...@bellsouth.net> wrote: > "You will probably see 250 mph with pants and 200 > hp" > > It doesn't work like that in the air, like adding HP > to a car and expecting > speed increases. Mark's climb rate will definitely > get a BIG jump, possibly > the best in the bunch so far, if he can match a prop > to it. But increasing > HP does little to increase cruise or top speed after > a point, especially for > planes flying at or near 200 mph and up. > > Back a few months ago we discussed this at length, > and all who have studied > on this have agreed; more is gained by drag > reduction than HP increase. To > double the speed, drag is increased by 4 times. To > get 250 mph from a KR2S, > one needs to lose the front wheel, or work very hard > on a completely > aerodynamically faired leg, not just a cover, and > the same holds true for > the mains, and their legs. Now anything sticking out > in the breeze becomes > important; so that round strobe Mark has will have > an impact at these > speeds; any antennae should have a fairing, not just > be left round; wing > root fairings need special attention due to this > area relating heavily to > the highest lift area on the wing so also > potentially the highest drag area; > cowl flap(s) become a consideration to reduce drag; > greater rake to the > vertical stab, etc... > > "Speed with Economy" is definitely the bible here... > > There are a lot of pluses to using the Mazda 13B in > aircraft with firewalls > designed for their weight. But without alot of > reinforcing, similar to the > refit rebuild that the KR360 got, I think the Mazda > is too heavy, and high > output. Better to use a different engine with > slightly less HP but just as > much torque after the re-drive and stay with what > your firewall/airframe can > handle... > > JMHO... > > Colin Rainey > brokerpi...@bellsouth.net > N96TA > > > _______________________________________ > Search the KRnet Archives at > http://www.maddyhome.com/krsrch/index.jsp > to UNsubscribe from KRnet, send a message to > krnet-le...@mylist.net > Post photos, introductions, and For Sale items to > http://www.kr2forum.com/phpBB2/index.php > please see other KRnet info at > http://www.krnet.org/info.html > ____________________________________________________________________________________ Finding fabulous fares is fun. Let Yahoo! FareChase search your favorite travel sites to find flight and hotel bargains. http://farechase.yahoo.com/promo-generic-14795097
