Phillip Matheson wrote: > Jannie sent this to me,when I answered his test. now I send it you all. > Phil....... > > > Wonderful. I have hundreds and hundreds of questions for you clever chaps > out there and if I may I would like to start pitching away. > > I am not sure if my previous posts were received so If I duplicate please > forgive me. > > The KR2s is specified to have an gross weight of 980 lbs. Is this > independent of the size of the motor. I mean surely if you have a 140Hp > motor in stead of a 70Hp motor you can lift more. I understand that gliding > will be an issue on a heavier plane. What I am actually asking is this. How > do they spec gross weight? Can I get past this limitation? As I might have > or might not have mentioned before. I am a big boy 335 Lbs. I have a heavy > Soob motor and I am seriously considering adding weight by placing the > cooling system under a wing. > > Thanks > > Jannie > > jan...@jadsys.co.za > > > > > -- > > Jannie du Preez > Managing Director > JAD Systems (Pty) Ltd. > Work: +27 11 234 3580 > Fax: +27 11 807 8460 > cell: +27 82 885 2255 > www.jadsys.co.za > Phil Matheson > SAAA Ch. 20 http://www.saaa20.org/ > VH-PKR > Australia > > EMAIL: phillipmathe...@bigpond.com > KR Web Page: www.philskr2.50megs.com > > > ------------------------------------------- > Search the KRnet Archives at http://www.maddyhome.com/krsrch/index.jsp > to UNsubscribe from KRnet, send a message to krnet-le...@mylist.net > please see other KRnet info at http://www.krnet.org/info.html > > > _______________________________________ > Search the KRnet Archives at http://www.maddyhome.com/krsrch/index.jsp > to UNsubscribe from KRnet, send a message to krnet-le...@mylist.net > please see other KRnet info at http://www.krnet.org/info.html > > Lift is a function greatly determined by the shape of the wing, and its angle of incidence. The purpose of the higher horsepower engine is to overcome the drag of the plane and thus allow the air to flow over the wings in an amount sufficient to develop the lift. So if its more lift you want, you would use a wing which has dimensions which would develop the lift you specify at the speeds you specify, then use a motor which would allow you to develop the torque (thrust) your plane needs to move the air over the wings (or the wings through that air..whichever).
Go to this link and try altering the various wing charateristics. It should help you understand the lift equation better: http://www.grc.nasa.gov/WWW/K-12/airplane/foil4a.html -- Glenn Martin Owner KR2 N1333A Biloxi, MS, 39532 rep...@martekmississippi.com
