What would cheyenne look like today?

[PR19_Kit]

Are there any 1/72 injection moulded models of the Cheyenne?

Yes --- if you can find one that isn't priced out of this world

http://www.oldmodelkits.com/index.php?detail=21904&searchtext=Cheyenne

I built that one as a window model for my LHS back in the early 70s. As I recall it was reasonably accurate in outline, according to the available info back then, but as with most Aurora kits it was very simple, with little detail or anything special about it. It's a BIG helicopter though!

[ChernayaAkula]

On the other hand, the co-axial rotor eliminates or at least lessens some problems associated with a conventional rotor (such as dissymetry of lift/retreating blade stall). The problem of retreating blade stall apparently also limits the possible top speed of a conventional helicopter.

Dissymmetry of lift, yes. The retreating blade stall problem still exists: after all, the blade still moves at the same speed relative to the air. So I don't expect a coax rotor system to be able to achieve higher speeds.

The way I understand is that since you have an advancing blade on each side of the helicopter at all times and therefore equal/near-equal lift on both sides of the helicopter, you unload the retreating blades and don't have them at such a great pitch angles, thereby keeping them from stalling.

[Caveman]

found these at random!!!

http://s362974870.onlinehome.us/forums/air/index.php?showtopic=180334&view=findpost&p=2004699

[perttime]

That reminds me: I'll be interested to see what Sikorsky makes out of the stuff they learned form the X2: fast, maneuverable...

[PR19_Kit]

found these at random!!!

Great minds obviously think alike! Those three incorporate quite a few of the ideas we came up with already.  

[coolpop6307]

Pardon me but i stole those pictures and created my own new vesion of the cheyenne. Here it is .




The reason I call it billy is because my uncle is in the hospital right now and I would like to dedicate this to him.

[coolpop6307]

By the way does anybody make a 1/48 cheyenne?

[Patron Zero]

Here's a link to some plans and models that could likely be up or down scaled to 1/48, enjoy !

http://www.fortunecity.com/meltingpot/portland/971/Inbox/a-c/ah-56-i.htm

http://ecardmodels.com/product_info.php?products_id=2123

http://www.modelaviation.com/ah-56

[coolpop6307]

Here's a link to some plans and models that could likely be up or down scaled to 1/48, enjoy !

http://www.fortunecity.com/meltingpot/portland/971/Inbox/a-c/ah-56-i.htm

http://ecardmodels.com/product_info.php?products_id=2123

http://www.modelaviation.com/ah-56

Thanks they do help

[Jschmus]

if they Brought back the Cheyenne, i think it would be Better if they used the NOTAR system instead. Rickshaw, Kaman Helicopters uses Co-Axial Blades on their Copter,Including the K-MAX! Not Trying to Argue,just Trying to keep things Civil. Dan

Actually, most Kaman helicopters use inter-meshing rotors.
HTK-1


HH-43 Huskie


The SH-2(and derivatives) was their lone conventional design.

[Cobra]

Thanks for Setting me Right. wasn't Sure if it was Intermeshing or Co-Axial.   a Lot of Stuff i read said Co-Axial. Dan

[PR19_Kit]

It's KAMOV that use co-axial rotors, the Russian guys. Has the same aerodynamic effect though, cancelling out the main rotor torque.