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HomeTurbineAircraftHelicopterTurbine Helicopters › CGI Gas Turbine Project
06-03-2012 01:01 PM  6 years agoPost 21
Héli Suisse

rrApprentice

Geneva Switzerland

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it has very little mass even at the speed its traveling at..
True. Using HeliCalc (an iPhone App) with following parameters
wheel diameter 70 mm
wheel tip speed 100000 rpm
rotor blade mass 1 g

the resulting centripetal force is 2686 N, about 274 kg!
with a rotor speed of 140000 rpm one gets 5265 N, or 537 kg

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06-03-2012 01:11 PM  6 years agoPost 22
Héli Suisse

rrApprentice

Geneva Switzerland

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Talking of velocity and energy one gets
at 100000 rpm same parameters: 366 m/s tip velocity
at 140000 rpm same parameters: 513 m/s tip velocity

which gives at 100k rpm a 66978 J energy to dissipate at impact, and
at 140k rpm a 131585 J kinetics energy

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06-07-2012 08:33 AM  6 years agoPost 23
NiCad

rrApprentice

Picton, Marlborough, New Zealand

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yes it hard to machine, but so is stainless steel and aluminum if your usimg the wrong tpool and feedrates..you can mill and lathe inconel the same as anything else
How does one machine Inconel™? As in, what tools to use when turning/milling the stuff?
so is stainless steel and aluminum
That's dependent on what grades you're machining. T6-6061 (Used in CNC-Machined heli rotor heads) can easily accept any high-speed steel tip. If one were to machine something like Stainless Steel or G10 Aluminum, said person would need to use something like a tungsten-carbide tool or greater.

Anyways, I've found out where I can get my bearings from: http://www.bocabearings.com/

Align T-Rex 500ESP 3G w/FPV rig.
Assault 450DFC.

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07-01-2012 12:18 PM  6 years agoPost 24
tripergreenfeet

rrApprentice

SA

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Here are some photos of a hand made turbine that a mate of mine built. He has been hand building turbines for 30 years with lathes and milling machines, recently he graduated to a CNC machine.

The outer housing is made from a stainless champagne bottle cooler.

Logo 550SX, Uvular Logo 600SE, TT E820

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08-01-2012 06:12 AM  6 years agoPost 25
NiCad

rrApprentice

Picton, Marlborough, New Zealand

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That's pretty impressive. Just one question; What are those fins for in that first picture? What do they do?

By the way, here's another concept I've been workin' on.
Again, it's a work in progress, but here's what I've drawn so far:

Align T-Rex 500ESP 3G w/FPV rig.
Assault 450DFC.

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