VTOL Shared Build ** SB is now open **

Here's where the general chat and organization of Group/Shared Builds takes place, with Guidelines, the GB/SB Calendar, and an Index to completed GBs.

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Dazzled
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Re: VTOL Group Build?

Post by Dazzled »

I'm in. Of course, rockets take off vertically too and if they land at all that's usually vertical too :grin:
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MarkyM607
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Re: VTOL Group Build?

Post by MarkyM607 »

I'll keep in!, might try something other than a Harrier though!!. :grin:
Hoping to return to modelling sometime this year!! :lol:
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iggie
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Re: VTOL Group Build?

Post by iggie »

Dazzled wrote:I'm in. Of course, rockets take off vertically too and if they land at all that's usually vertical too :grin:
That's a thought...... :grin:
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JohnRatzenberger
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Re: VTOL Group Build?

Post by JohnRatzenberger »

Well then, we could include autogiros capable of being jump-started ...
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IronMan129
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Re: VTOL Group Build?

Post by IronMan129 »

Haha well yes they do!
Could we count rockets?
I think we need to change the name again to the "Up and Down GB" haha!
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DavidWomby
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Re: VTOL Group Build?

Post by DavidWomby »

Not many rockets I know of do a VL. The SpaceX Falcon does. Does the Jeff Bezos one?

Not sure about autogyros. Aren't they more STOL?

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Re: VTOL Group Build?

Post by IronMan129 »

I thought rockets all do basically a controlled crash with a id if parachutes?
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iggie
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Re: VTOL Group Build?

Post by iggie »

Yep.....
But it's still a vertical landing :-D
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fredk
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Re: VTOL Group Build?

Post by fredk »

jRatz wrote:Well then, we could include autogiros capable of being jump-started ...
dwomby wrote:...Not sure about autogyros. Aren't they more STOL?...
Autogyros are STOL and some of them not even that. They need the forward motion provided by [usually] a pusher prop or jet to get the main rotor turning to provide lift. Queens University used to have some they used at Newtownards Airport. Most of them took longer to take off and get to 50 feet than the Cessna 172 types took to get to 100 feet.
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JohnRatzenberger
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Re: VTOL Group Build?

Post by JohnRatzenberger »

fredk wrote:
jRatz wrote:Well then, we could include autogiros capable of being jump-started ...
dwomby wrote:...Not sure about autogyros. Aren't they more STOL?...
Autogyros are STOL and some of them not even that. They need the forward motion provided by [usually] a pusher prop or jet to get the main rotor turning to provide lift. Queens University used to have some they used at Newtownards Airport. Most of them took longer to take off and get to 50 feet than the Cessna 172 types took to get to 100 feet.
No, some autogiros ( two that I am aware of are the Ciera and Kellet ) have secondary flight controls -- a rotor transmission clutch (aka pre-rotator) which, when engaged, starts the rotor spinning before takeoff, and a collective to reduce blade pitch beforehand. The trick, and it is a trick, is to overdrive the rotor and basically pop it off off the ground, disengage the clutch, and let the engine pull it forward, back in normal autogiro mode.

Here is an old film on youtube showing a Ciera: https://www.youtube.com/watch?v=ly261Dt1Of8;
There are a few other, new autogiros, that do this also - google "autogiro jump takeoff"

And here, from my museum, is a still sequence showing Dave Driscoll jumping a Kellet XO-60
Image

Image

Image
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fredk
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Re: VTOL Group Build?

Post by fredk »

Then strictly its not an AUTO-Gyro
The very name indicates that the rotor is self turning and not powered.
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lancfan
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Re: VTOL Group Build?

Post by lancfan »

Fred, such a machine would still fly unpowered, the powered rotor is just meant to shorten the take off run.

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IronMan129
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Re: VTOL Group Build?

Post by IronMan129 »

Ooooook so just to confirm who is ok with Jan to Feb?
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fredk
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Re: VTOL Group Build?

Post by fredk »

For me, with the other GBs running in January - February - early March I'd prefer it later; Mid-March into April
But I shall probably just try to fit it in when ever it is
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JohnRatzenberger
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Re: VTOL Group Build?

Post by JohnRatzenberger »

Unsure.
It depends on my progress with an off-line conversion project.
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