Want to fly but hate airports ? Here you go :
Build your own Girocopter
OK , I hear ya . You don't got no $19 K to throw around ?
Try this instead . Here is a paramotor version that you wear on your back .
It doesn't have those enormous blades over your head .
It is much smaller and lighter than the other machine and for that reason it probably has a better range .
Compare it to this ultralight . It has only one propeller .
You just know that is also going to cost some big bucks . Also you still need an airport .
Notice the counter-rotating propellers in the previous paramotor machine .
Does anyone care to take a guess what the purpose is for that arrangement ?
And last of all , I couldn't resist the electric paramotor "E-PAC"
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And yet you have no fear of "tap dancing naked" in the chat room ...
Nevermind that . Can you answer the question posed in the article :
"Notice the counter-rotating propellers in the previous paramotor machine .
Does anyone care to take a guess what the purpose is for that arrangement ?"
Here is the link :
OK, in the words of my friend Steve L, this is all I have to say.
No wings and one motor. Enough said.
Still, very cool for the money!
Shoot!
...and I already submitted my Christmas wishes to Santa!
:~)
Humm... now that has me thinking Larry. What would Larry wish for????
That's half of the purpose Randy . Do you want to take a guess at the other half ?
P ,
Did you notice what language he was speaking ?
Yes, Italian. Thelanguageof love.
Larry ,
I might have an in with Santa . Which model interests you ?
And Mussolini ...
:~)
Actually my only Christmas request was the new Preston/Child read . Their books are an absolute blast!
Alright!
Girocopter for me, it really looks like fun!
oh, and thank Santa for me...
:~)
OK then Larry . But you're gonna hafta answer this question :
"Notice the counter-rotating propellers in the previous paramotor machine .
Does anyone care to take a guess what the purpose is for that arrangement ?"
Here is the link :
you answer the question posed in the article
Ha!
To go straighter!
Well , yes but I'm going to need MORE , lots more . The effects you are defeating by having those 2 props [there are 2 effects] have names .
What are they & what happens if you don't defeat them ? What I'm getting at is the vast majority of paramotor designs don't use 2 counter-rotating props . What problems can you expect if you fly one of those ? Think it over . I'm going to bed .
Well first of all there is a difference in "counter-rotating" props and "contra-rotating" ones. I believe your question is actually about the "contra" one.
It seems that it is useful in negating the affects of air rotated by the props, hitting the tail and causing the plane to lean or yaw or whatever ya call it (P-factor?). It also seems to be moreefficientas there is all this airflow coming off that single prop and the second prop uses that wasted energy.
One problem with contra-rotating props is added vibration and noise. Also the added mechanics of the transmissionmakes them quite a bit heavier.
Very interesting...and thanks for the challenge!
:~)
btw...I got that from a few different places...
...I admit to cheating but hey, what can I say!
:~)
Well done Larry and Randy . But you both got only one of the 2 effects . You got the torque stabilizing effect on yaw .
That is important . But there is another effect that only applies to very light aircraft such as that paramotor design .
I think I'm just going to spill the beans instead of torturing you with a quiz . There is a gyroscopic effect too . This can be observed in a gyroscope or spinning top . It should just fall over from gravitational forces but it keeps righting itself and it does something called precession . [The top of the axis moves around in a circle .]
There are well defined forces from spinning objects that affect the flight path .
In the case of a single prop paramotor , if you tried to pull your nose up or down there would be a deflection left or right . Likewise , if you tried to turn left or right there would be a deflection up or down . But by using two contra-rotating props [Larry , I stand corrected] that would eliminate most of the deflection .
Very cool and thanks Rich. That actually makes sense(
helps, I'm a visual kinda fella) once ya think about it. It also helps explain some of the comments I read on those blog sites; it seems that these props are used when they have especially heavy torque to deal with. Now I get it. It also makes sense why they would bea particular help in light aircraft.
Man, where is our resident airplane engineer Lonkouski?! I coulda hit him up for some answers and gotten a Girocoptor for Christmas...but then it wouldn't have been so much fun!
:~)
That looks entertaining ... Still , I don't think you could use it to get to work .
Depends if ya work at the top or bottom of the mountain.
;^)
Or if you want to arrive at work without losing your breakfast ...