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Search: Posts Made By: ArCeeFlyer
Showing results 1 to 25 of 306
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Forum: Kit Building
07-22-2009, 09:06 PM
Replies: 13
Views: 1,591
Posted By ArCeeFlyer

RE: X-Acto vs Hobbico Blades.

Polymers are notorius for being hard on metal cutting edges. Ask somebody at a plastics company where they cut and extrude all kinds of plastics. It really wears out the blades faster than other...
Forum: Aerodynamics
10-16-2008, 03:57 PM
Replies: 525
Views: 38,165
Posted By ArCeeFlyer

RE: [Deleted]

But it is interesting though.
Forum: Aerodynamics
10-16-2008, 01:50 PM
Replies: 525
Views: 38,165
Posted By ArCeeFlyer

RE: [Deleted]

Just curious, if the air as far as our models are concerned is non-compressible, or non-decompressible for that matter as well, then how does the wing create a pressure differential to create lift? ...
Forum: Aerodynamics
10-15-2008, 01:36 PM
Replies: 525
Views: 38,165
Posted By ArCeeFlyer

RE: [Deleted]

I thinking that the air molecules gravitate towards the center of the pressure wave as they are compressed, kind of scooped up.
Forum: Aerodynamics
10-15-2008, 01:06 PM
Replies: 525
Views: 38,165
Posted By ArCeeFlyer

RE: [Deleted]

Isn't there somewhat of a pressure wave caused by the leading edge of the wing that has a lot to do with the air moving up to it prior to contact? Like when a balloon is about to be hit by an...
Forum: Aerodynamics
10-10-2008, 10:17 PM
Replies: 525
Views: 38,165
Posted By ArCeeFlyer

RE: [Deleted]

Yes, exactly why I said forward airspeed. It's just being able to play around with the momentum of the plane, forward, neutral, backward, while maintaining airspeed, makes it kind of interesting and...
Forum: Aerodynamics
10-10-2008, 08:48 PM
Replies: 525
Views: 38,165
Posted By ArCeeFlyer

RE: [Deleted]

I love to fly in very strong wind and do exactly that a lot of times. It's so interesting watching the physics in action. Forward airspeed with backward momentum with total control. I'm sure lot's...
Forum: Aerodynamics
10-08-2008, 05:20 PM
Replies: 525
Views: 38,165
Posted By ArCeeFlyer

RE: [Deleted]

Funny thought. You could say gravity is actually doing the lifting, since without gravity there wouldn't be any air pressure. ;)
Forum: Aerodynamics
10-08-2008, 11:17 AM
Replies: 525
Views: 38,165
Posted By ArCeeFlyer

RE: [Deleted]

Seems to me that lift has everything to do with yaw stability where the pressure differential equalizes and the lifting force from both directions cancell each other out. Drag is simply trying to...
Forum: Aerodynamics
10-06-2008, 02:10 PM
Replies: 525
Views: 38,165
Posted By ArCeeFlyer

RE: [Deleted]

Okay, tell me if I'm on track here. First, let me use the word "push" as an alternate meaning of "lift" so it sounds better when used in any direction. Btw, thanks CrateCruncher, for reminding me...
Forum: Aerodynamics
10-05-2008, 10:48 PM
Replies: 525
Views: 38,165
Posted By ArCeeFlyer

RE: [Deleted]

I think I can understand what Dick is getting at about thinking outside the box. For me, the classic definitions of lift and drag hold the most sway. They are seperate forces by definition and...
Forum: Aerodynamics
10-05-2008, 03:12 PM
Replies: 525
Views: 38,165
Posted By ArCeeFlyer

RE: [Deleted]

That's interesting. I wonder, can lift be expressed in negative quantities, but still be positive in the sense that it's slowing the object against gravity? Take a powerless sailplane for example. ...
Forum: Aerodynamics
10-03-2008, 12:29 PM
Replies: 525
Views: 38,165
Posted By ArCeeFlyer

RE: [Deleted]

Then the real question is basically a human psychology one and not so much an aerodynamic one. It may have to do with all the mystery generated by the top of the wing as this thread really shows.
...
Forum: Extreme Speed Prop Planes
10-02-2008, 01:11 PM
Replies: 163
Views: 37,808
Posted By ArCeeFlyer

RE: wild hare, LR-1 pylon racer

Wow! That is some serious speed. Great video.
Forum: Aerodynamics
10-02-2008, 12:57 PM
Replies: 525
Views: 38,165
Posted By ArCeeFlyer

RE: [Deleted]

It's very natural for the human mind to perceive things in nature in positive quantities and qualities much more so than negative. Think back to early school days as a kid when it was easy to grasp...
Forum: Extreme Speed Prop Planes
10-02-2008, 12:21 PM
Replies: 163
Views: 37,808
Posted By ArCeeFlyer

RE: wild hare, LR-1 pylon racer

I bought mine from Wild Hare RC. Looks like they don't have them anymore. If you call them, maybe they could tell you where to find them. I paid $150 for mine as part of a 4 plane package which...
Forum: Aerodynamics
09-30-2008, 10:17 PM
Replies: 525
Views: 38,165
Posted By ArCeeFlyer

RE: [Deleted]

I used to do that all the time until I got a June bug rammed down my throat. :D
Forum: Aerodynamics
09-30-2008, 09:05 PM
Replies: 525
Views: 38,165
Posted By ArCeeFlyer

RE: [Deleted]

Of course pressure is felt on any part of skin, but the palms and finger tips are much more sensitive to it. You'll feel the pressure on the back of your hand too if turned to the bottom against the...
Forum: Aerodynamics
09-30-2008, 12:38 PM
Replies: 525
Views: 38,165
Posted By ArCeeFlyer

RE: [Deleted]

If you research a bit about epidermal nerve endings, you will find that our palms are highly sensitive to pressure, much more so than the backs of our hands. Attaching a vacuum hose to the back of...
Forum: Aerodynamics
09-29-2008, 08:44 PM
Replies: 525
Views: 38,165
Posted By ArCeeFlyer

RE: [Deleted]

It depends on how you angle your hand to either feel only pure drag (like square on) or lift along with the drag when angled slightly positive. When angled just right to "feel" the lift, I think...
Forum: Aerodynamics
09-29-2008, 03:16 PM
Replies: 525
Views: 38,165
Posted By ArCeeFlyer

RE: [Deleted]

It seems to me that one reason people feel the top of the wing is much more critical in maintaining lift is the ease that airflow can detach from the top. It's basically impossible to detach the...
Forum: Aerodynamics
09-27-2008, 12:38 PM
Replies: 525
Views: 38,165
Posted By ArCeeFlyer

RE: Why do people say the top of the wing causes the plane to fly?

The force refered to as lift on planes can obviously be applied in any direction. For example, the wing on an Indy car used for down force (down lift if you will). Sail boats use it horizontally...
Forum: Aerodynamics
09-26-2008, 01:25 PM
Replies: 525
Views: 38,165
Posted By ArCeeFlyer

RE: Why do people say the top of the wing causes the plane to fly?

That was like a breath of fresh air. Beautifuly explained and simplified enough for everybody to understand. Thank you Lou.
Forum: Questions and Answers
09-20-2008, 12:49 AM
Replies: 4
Views: 577
Posted By ArCeeFlyer

RE: Flaps vs flapperons

Seperate inboard flaps have some advantages over flaperons, such as being more stable (washout effect), you retain all your aileron deflection (no mixing with flaps using up part of the aileron...
Showing results 1 to 25 of 306
 
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