I did a quick look assuming two wings 25” span 4” chord separated by 12” TE to LE. To get a reasonable Static Margin for stability (about 20%) needed the CG to be only 2” behind the TE of the leading wing. This says to me that the forward wing would be doing most of the work at quite a high lift coefficient but that the rear wing would be mostly going along for the ride. However, as I said, that was a quick look. Why not get your slide rule (sorry, computer!) out and run some figures. You might surprize us all.
John Barker - England
From: Indoor_Construction_at_yahoogroups.com [mailto:Indoor_Construction_at_yahoogroups.com]
Sent: 19 May 2015 18:05
To: Indoor_Construction_at_yahoogroups.com
Subject: RE: [Indoor_Construction] Mass vs flight time
Someone knows what occurs with tandem models , ie , with the same shape and size in the wings and stabilizer. Is there a specific formula for this type of models ?, How the contribution of the rear wing lift is considered and how this affects the duration of the flight ?
Thankyou
Received on Wed May 20 2015 - 03:22:29 CEST
This archive was generated by Yannick on Sat Dec 14 2019 - 19:13:48 CET