If this is your first visit, be sure to check out the FAQ by clicking the link above. You may have to register before you can post: click the register link above to proceed. To start viewing messages, select the forum that you want to visit from the selection below. |
|
|
Thread Tools | Display Modes |
#1
|
|||
|
|||
Wing in Ground Effect?
Hi all...
I know this is somewhat off topic perhaps...but maybe somebody here has the tidbit of info I need.... As Im sure you all know....the Lift to drag ratio of a wing goes way up once it gets close to ground.....and roughly speaking the effect becomes pronounced when the wing has an altitude on the same order as the span of the wing or less..... What I was looking for was: 1..... a graph that shows the L/D ratio as the wing gets closer and closer to the ground......anything rough will do...I found such a rough graph once a year or 2 ago on the internet....but I cant find it again...... 2.....question.....as you approach the ground VERY closely (lets assume your landing gear are up AND you somehow maintain a constant forward speed AND you maintain the same angle of attack) does the drag GO down or does the lift go up? 3.....lets assume a wingspan on the order of 6 feet and a chord of 2 to 3 feet.....flying say 6 inches to a foot about the ground at 40-60mph....(yeah, Im gonna be building the worlds fastest flying lawnmower .....what kind of lifting force could I reasonably expect? .....if you dont have the values for the ground effect itself......I could still use the numbers for "high" altitude values and fudge them from there to get back of the envelope ground effect numbers.... take care all Blll |
Thread Tools | |
Display Modes | |
|
|
Similar Threads | ||||
Thread | Thread Starter | Forum | Replies | Last Post |
wing root strakes (not canard A/C) | Wallace Berry | Home Built | 0 | October 2nd 03 08:47 PM |
Props and Wing Warping... was soaring vs. flaping | Wright1902Glider | Home Built | 0 | September 29th 03 03:40 PM |
Can someone explain wing loading? | Frederick Wilson | Home Built | 4 | September 10th 03 02:33 AM |
Wing Extensions | Jay | Home Built | 22 | July 27th 03 12:23 PM |
Antenna Ground Plane Grounding | Fastglasair | Home Built | 1 | July 8th 03 05:21 PM |