Hi Guys,
LOVE your work, and just ordered my first kit from you (the Cub),
BUT........
Can we just talk about some basic physics/aerodynamics?
I'm a life-long model and full size pilot (I fly 737sfor a living, NOT that that makes me an authority), and there have been a couple of comments on the video that have made me cringe a little.
One was a comparison test of two drones which you noted flew at the same top speed in nil-wind, yet were suprised that they STILL did the same speed in a head-wind, as if one would "Catch the wind" more than the other,
That's not how it works!!
An aircrafts top speed is an AIRspeed- the speed the air passes over the craft, and is when the drag equals the thrust. Whether or not that air is moving over the earth in the form of wind makes no difference to the AIRSPEED the craft can obtain, so if two can achieve the same speed as each other in nil-wind, they will achieve the same speed as each other in a head, tail or crosswind. An aircaft doesn't "know" the air around it is moving relative to the earth.
Similarly, Josh made a comment in a video that an aircraft will pitch up as you turn into wind, and down as you turn down wind.
No it doesn't.
Think of a fish turning around and around in a fish bowl. Now understand the bowl is on a train doing 100MPH. The fish doesn't find it harder to turn in the direction the train is going or easier to turn in the opposite direction, because the water it is swimming in is already doing the 100MPH. Similarly, and aircraft turns in the "bowl" of air around it- and it makes no difference to the aircraft if that air is moving relative to the earth.
These concepts can be hard for modelers to accept, because WE stand on the ground flying a model that is in the AIR- but as someone who regularly does tight circles in high winds in my (fullsize) glider, I can assure you it doesn't pitch up and down as I turn into and out of the wind!!
LOVE your work, and just ordered my first kit from you (the Cub),
BUT........
Can we just talk about some basic physics/aerodynamics?
I'm a life-long model and full size pilot (I fly 737sfor a living, NOT that that makes me an authority), and there have been a couple of comments on the video that have made me cringe a little.
One was a comparison test of two drones which you noted flew at the same top speed in nil-wind, yet were suprised that they STILL did the same speed in a head-wind, as if one would "Catch the wind" more than the other,
That's not how it works!!
An aircrafts top speed is an AIRspeed- the speed the air passes over the craft, and is when the drag equals the thrust. Whether or not that air is moving over the earth in the form of wind makes no difference to the AIRSPEED the craft can obtain, so if two can achieve the same speed as each other in nil-wind, they will achieve the same speed as each other in a head, tail or crosswind. An aircaft doesn't "know" the air around it is moving relative to the earth.
Similarly, Josh made a comment in a video that an aircraft will pitch up as you turn into wind, and down as you turn down wind.
No it doesn't.
Think of a fish turning around and around in a fish bowl. Now understand the bowl is on a train doing 100MPH. The fish doesn't find it harder to turn in the direction the train is going or easier to turn in the opposite direction, because the water it is swimming in is already doing the 100MPH. Similarly, and aircraft turns in the "bowl" of air around it- and it makes no difference to the aircraft if that air is moving relative to the earth.
These concepts can be hard for modelers to accept, because WE stand on the ground flying a model that is in the AIR- but as someone who regularly does tight circles in high winds in my (fullsize) glider, I can assure you it doesn't pitch up and down as I turn into and out of the wind!!
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