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Ace Hobby . Esprit Model . Thunder Power RC

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Got Jet Fuel? Turbine Helicopters > At Last a Body for my Turbine.
 
 
Peter G
Senior Heliman
Location: Runcorn, Cheshire, UK


I finally picked up my Body from Vario yesterday.
That tape next to it is 72 inches long.
This is my first scale attempt, so I am open to sugestions etc.
Not to keen on an Army colour scheme, maybe bright yellow, to be completely different!!!
10-09-2003 Over year old.
HOMEPAGE  
 
 
Vario_UK
Senior Heliman
Location: UK

thought this was a winter project !!!!!!!!!!!!
John.
10-09-2003 Over year old.
HOMEPAGE  
 
 
midwestpilot
Elite Veteran
Location: Crystal Lake, IL

jet exhaust?

Will it go out the scale port..or do you have to route it out differently?

In life there is no spacebar!

Rich Erikson AMA 6175
10-09-2003 Over year old.
HOMEPAGE  
 
 
Peter G
Senior Heliman
Location: Runcorn, Cheshire, UK

Midwest
The exhaust comes out at the rear, just behind the main shaft.
If you look at the photo you will see the Turbine exhaust is in place.
Cheers
Peter G
10-10-2003 Over year old.
HOMEPAGE  
 
 
Spencer K
Senior Heliman
Location: Phoenix, Az

you have the exhaust deflected up. do you think there is a problem that the blades will get a little warm?? what is the exhaust temp????
10-12-2003 Over year old.
 
 
BigD
Senior Heliman
Location: Dallas, GA

Turbines exhaust between 500-700 degrees I have been told. I have always thought the same thing about the blades but so long as you use FG or Carbon I guess it isn't an issue since they are spinning at such a high rate that they cool at the same time. Just balance them so that you can add a hotdog to each of them so you can at least get a good day of flying and eating


hmmm wonder what a hotdog would do at 1700rpm
10-12-2003 Over year old.
HOMEPAGE  
 
 
vetrider
Elite Veteran
Location: Daleville, AL (Ft.Rucker)

The exhaust shouldn't be a problem as long as you don't leave the blades over it on startup. Once spinning they'll be fine.

The same thing is done to the real Cobra's and on Bell Rangers, Hueys.

Nolan Manley
RREMODELS, KBDDintl, Magnum Fuel
Stratus, ODIN, Knight3D, ATOM 500, TREX 700N.
10-12-2003 Over year old.
 
 
Sandy S.
Heliman
Location: FLORIDA USA

They should be just fine, I fly NH-90's all the time and as long as you avoid start-up, there is no problem. The sound is SO much better this way.I have a bk-117 with a simlar system but it doesnt pass through the blades and thus the sound is only so-so. They will eventually brown up a little bit on the bottom side, but this is not a concern.
The quality of that Cobra kit looks very good.
Have a blast with it!
10-12-2003 Over year old.
 
 
BigRagu
Senior Heliman
Location: Utah

Cobra

Peter G,
If you're not keen on the olive drab check out the Marine Corps light and dark blue version . . .awesome!
Oh . . .good luck!

BigRagu
10-13-2003 Over year old.
 
 
optikaman
Veteran
Location: EnglishTown N.J.

exhaust temp

BigD the exhaust temp you have stated is in Celsius when converted to Fahrenheit he will have an exhaust temp of around 1000 degrees. It looks like he will have a clearance of round 6 to 8 inches from the exhaust stack. his blades should be fine at that distance while moving.

I would guess that his blades will get on the warm side and if they start to turn colors like sandy states then I would suggest that he replace them each flying season, vario blades have a foam core and if the gel coat is starting to show the effects from the heat then the foam core might begin to breakdown over time and weaken the blades.



Alan...
10-13-2003 Over year old.
 
 
Sandy S.
Heliman
Location: FLORIDA USA

our graupner blades are carbon inner core, no foam. its just soot that collects underside of the blades.As long as you dont see "print through" they are fine.I have countless flights on the same set of blades and the factory prototype just ticked off its 300th flight with the same rotor equipment, the vario cobra being factory designed should work just fine.
10-13-2003 Over year old.
 
 
Spencer K
Senior Heliman
Location: Phoenix, Az

allright then, you are ready to go. the reason i brought this up is a) the exhaust temp is around 1000 degrees. b) people say "cover your blades, or dont leave them in the sunlight because i guess the heat will make them start to seperate brown on the blades would look really cool and scale like!
10-13-2003 Over year old.
 
 
optikaman
Veteran
Location: EnglishTown N.J.

Graupner Blades

Sandy are you saying that Graupner blades are solid carbon fiber like Bolly carbon propellers, or are they hollow? I don't believe that they are hollow as I have owned a pair and they are not heavy enough to be solid carbon fiber. I believe they are either balsa or foam core blades.

look at a pair of broken blades or cut a blade and let us know.


Alan...
10-13-2003 Over year old.
 
 
Sandy S.
Heliman
Location: FLORIDA USA

i can tell you for sure they are carbon inside both skins and hollow. I walked into a set on spool down on a pod and boom cuz I wasnt used to the size...way back when, broke/split one over my shin...after an hour or so, I got up and looked at them... dang! carbon and hollow! They can take some abuse but I would change a set every flying season just to be safe in my own personal tastes.
10-13-2003 Over year old.
 
 
maxturbine
Senior Heliman
Location: Snohomish,WA

Turbine Cobra

Hey

Just bought one myself. I keep looking at the Vario DVD of this machine. It was in Model Helicopter world.

Well it has not fallen out of the sky yet from melted blades.

I guess all ok.

What are you guys worried about?

Vario has figured it out.

Ralph
10-21-2003 Over year old.
 
 
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Mikado Modellhubschrauber . GrandRC . CanoMod

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Got Jet Fuel? Turbine Helicopters > At Last a Body for my Turbine.
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