How To: Inverted 450 Auto's

[jamiem]

With Dave Rand (Drm Black7)

So last time round Dave was teaching us pirouetting tail slides (and failing spectacularly!), today we have inverted autos on a 450 pro. He has never ever done an inverted auto on ANYTHING, and chose his 450 as his weapon of choice to try them on for the first time. I tried coaching him through it, so watch and learn (how not to do them)

In fairness actually, he did pretty well for a 450, but learn from his mistake - don't flare at 30-40ft, you have no chance of making the flare in to a landing without a big bump!

Enjoy

http://www.youtube.com/watch?v=ig9UiLXrerU

[milly0812]

Nutter !!! :-))

[waveydavey]

So funny I shouldn't laugh but it is, fairplay Dave just what the hobby is about

[LipolyGone]

Nice one had a little chuckle over some of the comments especially Daves at the end lol

[Delarado]

Looks good Nice flying! What is a flare though?

[jamiem]

The flare is the last part of the auto, where you pull back on the elevator to lift the nose, to present the rotor disk to the forward motion. This has the duel effect of building headspeed up to allow to you control a nice landing, and also slows the forward speed down without using any of the energy in the disk.

A 450 has virtually no momentum in the blades, so the flare has to be done very low, even more so in an inverted auto!

Absolutely fair play to Dave, he did well to not break it on his first inverted autos, ever, AND on a poxy little 450! Sacko's didn't end quite so well, that video will go up tonight

[Delarado]

Ah ok makes sense, I know what you mean now. How does it build the headspeed up though? Surely as your loading the disc (to get the rotation you command) it slows down?

[Planehazza]

Ah ok makes sense, I know what you mean now. How does it build the headspeed up though? Surely as your loading the disc (to get the rotation you command) it slows down?

The same that when you blow through a toy fan, it spins. When you're moving forward, the oncoming is hitting the edges of the blades and doing little to their speed. When you pitch up into a flare, the oncoming air is coming up into the blades. So as long as you have a little bit of negative pitch, they should speed up, or at least not bleed off speed.

I can't auto very well myself yet but I understand the theory. The flare basically transforms the forward motion into enery in the blades.

[Delarado]

sort of makes sense but sort of dont, because what I want to say is that if you have any negative pitch then surely the heli will just crash into the ground?!

[Planehazza]

Nope, because providing you have enough forward speed, the heli will still "pull up" during the flare. Easier said than done like anything heli related, but that's the theory of it. And you're only using around -4deg pitch, not the whole range.

[Dave Rand]

Cheers guys, really did think it was going home in bits lol it all happens so quickly tho
Sackos where much better plus he's got some big old balls, to not only Invert Auto his 450 Fbl but then to do it with his 700.

I no it would be easier but sod that!! Lol

[muscleflex]

sort of makes sense but sort of dont, because what I want to say is that if you have any negative pitch then surely the heli will just crash into the ground?!

by applying negative pitch, you maintain rotation speed on the blades. flare is just when you then apply positive pitch to land it softly (the blades will have enough spinning force on them because of the negative pitch you provided earlier), the reason why you need to then time the flare right is because by applying positive pitch, you are using up all the energy from the spinning blades and they will then slow down and stop... and crash if you're not on ground yet.

thanks for the video... is that how you practice an auto? by practicing your entry with power?
i'm currently practicing it with my 450 by hovering at about 3-4 feet and doing throttle hold. aint easy!

[Sesame]

HAHA Jamie that is just mad, EXCELLENT!!! whens he trying it with a 250?

I was trying that last year into long grass only way of not breaking it, must have a go inverted LOL

cant wait to see Pauls go

[Dave Rand]

Muscleflex yes, just to get used to the angle and how to enter it, the flip at the end feels completely different tho.

[Lynx.1677]

Nice one! Glad I am not the only one trying these things on a 450. Weirdly, I find it easier to auto the 450 with a flybar! With FBL it seems to have a weird lack of response to pitch and then all of sudden it reacts leading to over correction and too much flare. With the flybar you get a much better progressive reaction to pitch input during the auto although the hangtime is a lot less.