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Search: Posts Made By: mesae
Showing results 1 to 25 of 500
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Forum: Glow Engines
06-14-2010, 05:22 AM
Replies: 36
Views: 4,947
Posted By mesae

RE: Power Loss at Altitude

Your true airspeed, and therefore groundspeed, will be higher on landing approaches at high altitude than at low altitude, so light weight to offset this will be helpful to you.
Forum: Aerodynamics
09-29-2007, 10:15 PM
Replies: 14
Views: 2,087
Posted By mesae

RE: How to cure stall snap to the right

Thank you hdsoar and Darryl. There's likely nothing seriously wrong with the airplane. It's doing what it's designed to do, and Caps do it very well, if you learn to control it.

There are...
Forum: Aerodynamics
09-29-2007, 09:54 PM
Replies: 18
Views: 2,958
Posted By mesae

RE: Suhkoi rudder coupling

The model you have selected has a nearly scale outline. It will have to be completely re-designed to become a decent so-called 3D plane. Not that it wouldn't be a thoroughly enjoyable plane to fly;...
Forum: Aerodynamics
07-03-2007, 10:22 AM
Replies: 17
Views: 5,639
Posted By mesae

RE: How do I flat spin

Length of tail alone cannot tell. Size of rudder and elevators is more important.

You, as the pilot, are in the best position to tell us whether your plane will flat spin or not. Try some of...
Forum: Aerodynamics
07-03-2007, 09:53 AM
Replies: 32
Views: 9,317
Posted By mesae

RE: Can you believe this flies?

The wind by itself doesn't affect the airspeed. The groundspeed, yes, but not the airspeed.
Forum: Aerodynamics
06-21-2007, 09:22 AM
Replies: 17
Views: 1,816
Posted By mesae

RE: elevator induced snap.

Ditto. da Rock speaks da Truth!!

Know thy airplane!
Forum: Aerodynamics
05-04-2007, 02:05 PM
Replies: 12
Views: 1,887
Posted By mesae

RE: wing rock?

reflex didn't help my giles. lightening it and moving the cg aft did. doesn't mean it would't help anyone.
Forum: Aerodynamics
05-02-2007, 03:54 PM
Replies: 12
Views: 1,887
Posted By mesae

RE: wing rock?

The best way is to start with an airplane known to have the features I have already alluded to.

You might be able to improve an existing plane by making sure there is enough elevator throw and...
Forum: Aerodynamics
05-02-2007, 10:07 AM
Replies: 17
Views: 5,639
Posted By mesae

RE: How do I flat spin

Positive flat spins to the right don't usually work as well, or at all, because gyroscopic precession raises the nose when yawing left, and lowers the nose when yawing right. This is the flight...
Forum: Aerodynamics
05-02-2007, 05:13 AM
Replies: 12
Views: 1,887
Posted By mesae

RE: wing rock?

Anything that reduces pitch authority can be a contributing factor for wing rock, but this is not the most important factor for wing rock alone. Even so, a well-aft CG is desirable for "3D", so a...
Forum: Aerodynamics
05-01-2007, 02:02 PM
Replies: 12
Views: 1,887
Posted By mesae

RE: wing rock?

Small yaw oscillations at and beyond stalling AOA can set up resonant rocking. The more stable your airplane is in yaw at high AOA, the less it will rock in harriers. Ever notice most planes...
Forum: Aerodynamics
04-20-2007, 09:47 AM
Replies: 13
Views: 2,509
Posted By mesae

RE: Aileron Differential question

Even on a positive 45d up-line, the wing is positively loaded, though not as heavily as in level flight, and adverse yaw works in the conventional way, i.e. too much down aileron causes yaw in that...
Forum: Aerodynamics
04-20-2007, 08:57 AM
Replies: 13
Views: 2,509
Posted By mesae

RE: Aileron Differential question

The above method is specialized for pure aerobatic planes, and can be used to find the right amount of differential to use for Comp-Arfs and such that use top-hinged ailerons. The aerodynamic...
Forum: Aerodynamics
04-12-2007, 09:33 AM
Replies: 9
Views: 10,041
Posted By mesae

RE: What's the different between a pusher and puller props?

Off topic: How do you like those tip plates?

Cooling drag can be HUGE. Racers know that too.
Forum: Aerodynamics
04-12-2007, 06:10 AM
Replies: 9
Views: 10,041
Posted By mesae

RE: What's the different between a pusher and puller props?

The shapes of the blades would not differ. The same propeller theory applies to both tractor and pusher props. There are aerodynamic results on the aircraft however, like no slipstream effect, if...
Forum: Aerodynamics
04-11-2007, 10:32 AM
Replies: 10
Views: 5,399
Posted By mesae

RE: airfoil choice for heavy lift ducted fan

Are you asking about the airfoil for the fan itself?
Forum: Aerodynamics
04-11-2007, 10:28 AM
Replies: 9
Views: 10,041
Posted By mesae

RE: What's the different between a pusher and puller props?

You can't just mount a tractor prop on an engine that is facing backwards because the engine needs to rotate the wrong direction for the prop. So you either need a pusher prop, which is different...
Forum: Aerodynamics
04-10-2007, 11:37 AM
Replies: 23
Views: 4,601
Posted By mesae

RE: Lowering of engine on thrust line

Chris, what is the specified CG for this model in %MAC?
Forum: Aerodynamics
04-10-2007, 11:29 AM
Replies: 23
Views: 4,601
Posted By mesae

RE: Lowering of engine on thrust line

Or would be a low wing Telemaster if the main wing's airfoil wasn't symmetrical. That throws off the relationship between the wing and tail as compared to the Telemaster. With the Telemaster, as...
Forum: Aerodynamics
04-10-2007, 10:09 AM
Replies: 23
Views: 4,601
Posted By mesae

RE: Lowering of engine on thrust line

For simplicity, I take the geometric convention, rather than an aerodynamic one, and every time I use the term "positively cambered", I mean greater camber on the top surface of the airfoil than on...
Forum: Aerodynamics
04-10-2007, 06:16 AM
Replies: 23
Views: 4,601
Posted By mesae

RE: Lowering of engine on thrust line

"O"riginal "P"oster.

Your airplane has a very unusual configuration with it's symmetrical main wing and cambered tail. As configured your plane is not meant to be seriously aerobatic, but...
Forum: Aerodynamics
04-09-2007, 11:59 AM
Replies: 23
Views: 4,601
Posted By mesae

RE: Lowering of engine on thrust line

Admittedly this was an assumption on my part but I thought the OP meant positive camber (curved on top) by the above remark. I await correction by the OP.

If my assumption was wrong, then my...
Forum: Aerodynamics
04-09-2007, 07:44 AM
Replies: 23
Views: 4,601
Posted By mesae

RE: Lowering of engine on thrust line

I agree that the characteristics you observe are caused by the positive cambered tail. It is lifting too much (or not providing enough down-force). That's why so much up-trim.

Raising the...
Forum: Aerodynamics
04-04-2007, 09:55 AM
Replies: 47
Views: 4,607
Posted By mesae

RE: Wing-Lift Increasing Idea (Tested by me)!!!!

Even Beech didn't consider all the factors from the beginning. Composite structures tend to be locally severely damaged by lightning strikes so for certification they had to add a metal mesh within...
Forum: Aerodynamics
04-02-2007, 11:48 AM
Replies: 51
Views: 5,873
Posted By mesae

RE: Why does it fly?

I heard or read something similar while I was in the USAF.
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