Tip jet (pressure jet) helicopter

[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?

[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.

[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]

@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.

[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

[hillberg100]

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

[jackehammond]

Folks,

This is a re-invention of the wheel as they say. The British R&D two helicopters on this principle. One a big mother called the Rotodyne. Again, R&Ding on this makes no sense. Btw, these type whether jet tip or just pressure air are LOUD!

Jack E. Hammond

.

[docatomics]

..very .pleased to see our mutual concept made it into the air back then, did anyone ever install the linear piston engine with compressor heads that my concept used. Far better efficiency & horsepower to weight than turbines , and far simpler & cheaper. So were are you at with this concept now ?

[roidroid]

@docatomics unwarranted self-importance is creepy.

[docatomics]

@roidroid ...then replace wog with mutaul confirmation

~ when you come up with a notion or even develope it into a concept or better yet working prototype, & another with resources , a brown nose or just shrewd & greedy beets you to the punch; don't get pissed or catch the cheat & gains, or turned off with feeling of disempowerment, rejoice as you were on the right track , even if the locmotive never moved off the siding, & keep at it, make good shit happens amoungst the abundence of bad shit.

[roidroid]

@docatomics where's your video of your working prototype?

[docatomics]

@roidroid .gave the concept to nasa through a freind in over 20 years back, lacking the resources or time to devote to the working prototype, focus on progress not self importance ego shit that we have been porgramed to covet & you'll get my drift; fuck how the world is, work on making it the way you caculate it shold be. Some of the concept are in mainstream use now, perhaps from my contribution , perhaps others were coming up with the same shit at the same shit time or before or after.

[roidroid]

@docatomics Did you send it to NASA so they could tell... you know... the Aliens?

[docatomics]

@roidroid ...no I gave my notions of a better way to a old friend , harvey wasotio , who was contracted to NASA at the time, trusting his judgment to find the best candidates to pass it on to, that it might enocourage others to do there thing, Beings that had the ablity to traverse interstellar would have no need of such tech as the first step to space is magentic bubble tech (void of atmosphere for boyancy), only used for sheilding silly provocator. I was tied up dealing with asshole then.

[blumagroup]

Technology is now owned by pegasushelicopters

[ace2a66d20]

so how much more fuel do these helicopters use?

[TamakoAkai]

Man, talk about max performance takeoff.

I like it already.

[Xigano1]

Very clever, but spare parts make alot of money :(

[VCat2006]

@Xigano1 Sorry, i meant to give you a thumb up. *should be in bed*

[zebadee277]

there was a concept in the 50's to make a form of helipack for indavigal soldiers that had a small ramjet on each rotor tip, and the germans had something like this in prototype at the end of the war for a vtol fighter

[ROBOBOY5000]

lol yep lame stupid people who dont listen to good ideas lol.

[ARMOROID5000]

That's incredible technology!

I wonder if it could be adapted to use on an aircraft like the V-22 ospray?

It doesn't have an autorotation ability but somthing like this could maybe take care of that.

There is great potential here!

[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.

[G777GUN]

@Elzon1

watch?v=qgSq1bB-eV4

Holy s**t! You like this, please check out mine. Its a modern day heavy lift design.

[docatomics]

@Elzon1 ...marketeers being allowed a say in the desing meeting , or lack of supporting technology at times. Such is survival in a consumption based society of created scarcity.

[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