touchdown autorotation video - from inside cockpit
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touchdown autorotation video - from inside cockpit
Joined: Aug 2000
Posts: 2,111
Likes: 118
Don't think that is an extended range auto as the rate of descent looks too high, but then again he has got the low rotor rpm horn on so he must be pulling pitch. But when he flares you would expect the horn to go off as the disc loads up even though you would naturally check this to contain rrpm.
The worst of all is landing on the concrete what is wrong with the grass, much kinder to the machine.
The worst of all is landing on the concrete what is wrong with the grass, much kinder to the machine.
Joined: Oct 2005
Posts: 61
Likes: 0
From: New Zealand
In the 300cbi the horn has two stages,
When it is beeping on and off the rotor rpm is somewhere in the bottom half of the green (but still in it). For most of this Auto this is where it was sitting. It is hard to tell if he stretching, when you do you don’t go that much further in a 300. Going by the entry point unless there was a strong wind I would not think so.
When it beeps continuously the RRPM is right at the bottom of the green or below it this is where it was on the entry.
He does recover RPM in flare.
Does seem a little harsh on gear doing a Run on onto the concrete
Crispy
When it is beeping on and off the rotor rpm is somewhere in the bottom half of the green (but still in it). For most of this Auto this is where it was sitting. It is hard to tell if he stretching, when you do you don’t go that much further in a 300. Going by the entry point unless there was a strong wind I would not think so.
When it beeps continuously the RRPM is right at the bottom of the green or below it this is where it was on the entry.
He does recover RPM in flare.
Does seem a little harsh on gear doing a Run on onto the concrete
Crispy
Joined: Feb 2002
Posts: 1,119
Likes: 0
From: N20,W99
Looks Great To Me!!
Keeping the RRPM a little low is absolutely normal to strech the glide, he didn't auto aligned to taxiway so he had to make it otherwise, it was what I would consider a Zero speed touchdown so I see absolutely no problem with going for the concrete, it's even safer since the ground could be mushy and he could get stuck with something. The machine obviously gains RRPM during the flare so he might it kept it there on purpose.
I loved it.
I loved it.
Joined: May 2004
Posts: 88
Likes: 0
From: UK
It looked like a very late flare to me, but then it could have been an optical illusion given that it is only a video, coupled with the fact that I've only ever flown Robbies and the process might be different on a 300
Joined: Mar 2005
Posts: 1,289
Likes: 289
From: Poplar Grove, IL, USA
Mine were all to hardtop
I learned in an Enstrom F28A, a great little machine to auto to touchdown. I didn't do any power recoveries except to prepare for the checkride. My instructor was a 4000 hour pilot, half in Nam, and he believed in shooting touchdowns to hardtop. Less friction, less likelyhood of it getting ugly and digging in in his opinion. We had carbides on the skids, and yes they wore out eventually, but I guess I saw them as expendables. Is it really hard on the machine to shoot to hardtop? Especially in a 300 with its great oleo gear.
-- IFMU
-- IFMU
Joined: Jan 2006
Posts: 123
Likes: 0
From: Playing in the sand
IMFU,
It says right in the POH that touchdowns should be less than 36kt IAS on a smooth, HARD surface. Thats why it has skid shoes and oleo dampers. We actually had a helicopter totalled at my school not too long ago because the student gave too much foward cyclic and dug the skid into the grass on a touchdown auto.
It says right in the POH that touchdowns should be less than 36kt IAS on a smooth, HARD surface. Thats why it has skid shoes and oleo dampers. We actually had a helicopter totalled at my school not too long ago because the student gave too much foward cyclic and dug the skid into the grass on a touchdown auto.
Joined: Mar 2006
Posts: 91
Likes: 0
From: Where i hang my hat
Originally Posted by Toohey29
excellent video 
- almost certain it was shot at space coast regional airport in florida so more than likely an HAI machine?
- almost certain it was shot at space coast regional airport in florida so more than likely an HAI machine?
Joined: Mar 2006
Posts: 358
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From: On the move...
Hard top.
In Oz we didn't do too many to the hard top, but then again in summer the ground was hard anyway. Wouldn't want to 'ball' up in soft grass.
At the end of the vid you can see other scratch marks where there had been previous autos. Or was that just an optical illusion?
At the end of the vid you can see other scratch marks where there had been previous autos. Or was that just an optical illusion?
Joined: Dec 2002
Posts: 36
Likes: 0
From: Scotland
Critics of this pilots auto (not me) should know full well that each and every auto is different with factors such as air density, wind speed and direction, weight, fuel quantity/tank configuaration , passanger position, air density etc etc all playing a part in making each one unique. Coupled with the fact you cant properly guage the flare height/ground speed from this video who is anyone to have a pop at this pilots technique? not me thats for sure!
And hands up who hasn't had the horn on upon initial entry to the auto on the odd occassion?
Well the C model I learnt in didnt have the luxury of such a device and in the 47 autos were a total non event but it was quite common to get the horn blasting out that shrill tone momentarily on instructor initiated throttle wind offs when I did my 22 and 44 endorsements.
My feelings are this video was a demo of a range auto with the rpm at the bottom of the green hence the beep beep of the horn and a textbook ** as per the POH** termination on a suitable hard surface.
And hands up who hasn't had the horn on upon initial entry to the auto on the odd occassion?
Well the C model I learnt in didnt have the luxury of such a device and in the 47 autos were a total non event but it was quite common to get the horn blasting out that shrill tone momentarily on instructor initiated throttle wind offs when I did my 22 and 44 endorsements.My feelings are this video was a demo of a range auto with the rpm at the bottom of the green hence the beep beep of the horn and a textbook ** as per the POH** termination on a suitable hard surface.