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Questions about the propulsive force of a powered aircraft.
171 questions
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Where to plot the level flight maximum range speed on the power curve?
I have recently been sharpening up on my flying theory and have run into an issue with the power and thrust curves due to this question:
Draw a graph showing the level flight power required and power
...
- 23
3
votes
2
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Is the airspeed for best endurance also the airspeed for best angle of climb?
Understanding that for a propeller driven aircraft, the airspeed for best endurance is the speed at which minimum power is required, and obviously the prop is more efficient at producing thrust at ...
- 31
7
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7
answers
2k
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Role of thrust during take off
When a airliner takes off, it looks like after rotation and lift-off, the plane flies up in the air parallel to the length of its fuselage.
Assuming lift from the wings is the major force in taking ...
- 173
9
votes
1
answer
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For the same amount of thrust, is a jet airplane quieter than a propeller airplane?
If you have two airplanes, one generating thrust directly with a jet engine, and the other generating thrust with a propeller (from any of its power sources i.e: ICE/piston, electric, etc), which one ...
- 7,643
1
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2
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131
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Effect on Thrust and Power Required Curves of Flaps
I know for a fact that the extension of flaps shifts the thrust required/total drag curve higher. How do I prove mathematically that it also shifts to the left (LDmax with flaps extended occurs at a ...
- 629
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2
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273
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What is the difference between thrust and lift?
I calculated the thrust and power of the helicopter to hover above the surface, but I'm not sure if I calculated correctly. I've already asked a similar question, but I've moved on, and there are more ...
- 3
1
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2
answers
203
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How many pounds of thrust can a TBM 900 pull at full thrust?
Curious of how many lbs/thrust can a single engine like the Socata TBM 900 (or a similar airplane) pull at sea level while parked at full thrust?
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can aircraft cruise speed be less than corner speed? my r-c PROPELLER plane calculations are saying cruise speed is less than corner speed.(Long read) [closed]
I have designed an aircraft and wanted to determine its performance charachteristics.
the following parameters have been utilised:
aircraft specifications:
Mtow = 1.7kg
wing_area = 0.411 m^2
Cl_max = ...
2
votes
2
answers
287
views
Why does flying at higher altitudes generally improve fuel efficiency for commercial airplanes given Specific Fuel Consumption rate (SFC)? [duplicate]
I’m a high school physics student with an interest in aviation and would like to understand why commercial airplanes fly at high altitudes (e.g., 35,000 feet) to improve fuel efficiency. My ...
0
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2
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183
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what is best approach to make high thrust from nozzle side? higher velocity or higher pressure?
Producing high thrust form jet engine is not one step. Actually, there are many factors that can significantly play rule here.
Anyway, am focusing only on the nozzle side and its rule only in my ...
- 161
1
vote
1
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171
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Climb angle relationship to excess thrust
In the PHAK, Chapter 5 Aerodynamics, the following statement is made regarding forces in a climb:
The thrust required for a stabilized climb equals drag plus a percentage of weight dependent on the ...
- 61
2
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1
answer
634
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how could engineers find pressure loss location in jet engines?
What are the tools, software or devices that jet engineers use to know if there is loss of pressure in the air? Are they using only calculations to know how much air in vs out?
It's very interesting ...
- 161
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2
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273
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How much energy per second would a nuclear reactor need to power a fighter jet?
Fighter jets typically require high amounts of thrust compared to other aircraft. Lets take the F-22 for example, and lets assume the F-22 powered by a nuclear reactor and the F-22 powered by a ...
5
votes
2
answers
1k
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Are narrow propellers more efficient than wider ones?
I came across this company E-Props that builds propellers and it seems like all their propellers are narrower, at least narrower than traditional ones I'm used to see, and I see on their picture ...
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2
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In a straight and level flight if thrust is equal to drag how is aircraft moving forward?
If two forces are equal and acting in opposite direction should not the object remain stationary.
Is there an excess thrust which actually pushes the aircraft forward ?
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