Tip jet (pressure jet) helicopter

A promotional video of the Bruno Nagler designed
pressure jet helicopter advantages over shaft driven helicopters. Contact Hoyt A. Stearns Jr.
10845 N. 120th St.
Scottsdale, Arizona US 85259-4166
+1 480 699 7110
http://HoytStearns.com
See Google video for the uncut 13 minute version.
for more details

Category:

Science & Technology

Tags:

• Helicopter
• VTOL
• Vertical
• Takeoff
• and
• Landing
• Sky
• Science
• Technology
• New
• Old
• Free
• Freedom
• Liberty
• Zeitgeist
• Addendum
• Jacque
• Fresco
• Future
• by
• Design

[JoeVSvolcano]

Sounds like a great idea but I'm sure there is a good reason we never went down this path.

[Elzon1]

Nope..... no reason..... just stubborn production who like one and only one method.

[comanchio1976]

@Elzon1 So why hasnt 1 company gone with it and cleaned up?..doesnt make sense.

[Elzon1]

@comanchio1976 major manufacturers just don't want to change what they produce. It would be difficult to switch to this since it will cost money to retool and they would have to market this product to make sure everyone understands its no different from the previous product. Just to much time, effort, and resources. The design itself is good though :D

[OneHoof]

@torped0vegas Yes... Helicopters autorotate very well if the engine fails. Some helicopters glide one mile horizonatally for every thousand feet they lose in an autorotation. You can watch a LOT of autorotation videos here on YouTube. Check them out. So, the bigger problem would be yaw control. Best regards, SGT V

[ThemBlinkingLights]

@torped0vegas

The tail rotor and main rotor are interconnected by a drive shaft. So in autorotation the main rotor drives the tail rotor keeping it turning therefore providing yaw control.

In the video when they show a shaft drive helicopters system you will see the output for the tail rotor drive shaft. They are showing a hughes 500 system but all main rotor tail rotor helicopters are similuar.

[bellaggio1770]

What's the energy-efficiency in comparision to shaft-driven systems? I believe air compressors are less efficient, although the pressure jet system has great advantages in simplicity, stability and ease of use.

[FIREHAWK1979]

They should look into using water jets to add mass to the exhaust, as in a bottle rocket...

[hillberg100]

The last flight It slung the rotors and crashed at Cammerillo Airport -Waste of fuel and noisey.

[1pnoe]

but does it blend?

[torped0vegas]

@ThemBlinkingLights

isn't it kind of academic though? shaft drive or tip jet, when the engine fails i would be more concerned about falling to my death than how much yaw control i had. and anyway isn't the tail rotor, well, engine powered? how does a shaft driven helo retain yaw control when the tail rotor isn't turning? or am i missing something here?

[ThemBlinkingLights]

There are two reasons why tip driven rotors haven't made a mark. These machines use just compressed air to drive the rotor. The older types had to use tip burning (compressed air, fuel added and ignited at the tips) to get the extra power needed to fly which is very noisy.

The other, and i think main reason, is lack of yaw control. This machine like uses engine exhaust for directional/yaw control. When in powered flight it works good, but engine failure now leaves little or no yaw control.

[hillberg100]

It slung a blade at a hover,A/C a write off, lucky he was at a low hover