# Tag Info

### How do I choose Cl during cruise flight with a given MTOM and variable S?

You might find Lee Nicolai's white paper "Estimating R/C Model Aerodynamics and Performance" a useful guide and reference. Look under "series resources/design event resources" at ...
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### How can the wing generate more lift than the thrust?

You are able to pull a sled or a cart way heavier than yourself, uphill, pulling it with a force lower than its weigth. Of course, if the path is way too much inclined, you will fail. It is the ...
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### How can the wing generate more lift than the thrust?

Just to complement a bit the other answers. How can the wing generate more lift than the thrust? The question is based on the false premises that: lift is always much bigger than thrust; and lift ...
• 12.8k

### How can the wing generate more lift than the thrust?

Lift is produced when the wings push air down. Doing so inevitably involves some drag that would tend to slow the airplane down or force it to lose altitude. The engine only needs to provide enough ...
• 15.9k
Accepted

### How can the wing generate more lift than the thrust?

A wing's shape allows it to deflect a large volume of air downwards while incurring a small amount of drag, which in turn means a relatively small amount of thrust (compared to the weight of the plane)...
Accepted

### Why Cessna 152 has different airfoils at the root versus at the tip of the wing?

At the end you'll find the answer to the question plus a short question to verify if I've made myself clear ;-) An airfoil can be basically described by 3 parameters: the shape/curvature of its ...
• 12.8k
Accepted

### Lift Coefficient question

I'd expect it to work better the other way around, i.e. with the profile flying to the right of your picture. 140° is way too low, the airflow will almost certainly detach by that corner. Values >...
• 12.8k
Does $\varepsilon$ or $C_{D,0}$ depend on absolute sizes? $\epsilon$ is in the range 0 to 1 and mainly depends on the spanwise lift distribution, so it does not directly depend on the global size of ...