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HelicopterMain Discussion › pulse jet helicopter
03-04-2007 05:15 AM  10 years agoPost 1
eyeflyhelis

Elite Veteran

charlotte nc

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so anyone ever make a psulse jet motor? seems kind of simple. anyone ever stick one onto a r/c heli? i know there is/was a few fullscale helis that use that method.

only you have the power to make no difference!

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03-04-2007 05:21 AM  10 years agoPost 2
OUCaptain

Senior Heliman

Heli Addict Rehab Center

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Correct me if I'm wrong, but isn't a pulse jet the type with no rotating parts? It's a series of repeated, contained explosions. I've seem them put on planks but never a heli.

"Human beings are viruses with shoes"

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03-04-2007 07:06 AM  10 years agoPost 3
alvinrc

Key Veteran

Mobile, AL, USA

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I think that I remember seeing plans in back of old Popular Mechanics mag for a single seat chopper you could build with a pulse jet engine in each main rotor blade tip to make the rotor head spin.

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03-04-2007 09:42 AM  10 years agoPost 4
Gearhead

rrMaster

Vt

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wow model pulse jet helicopter. never thought about it,, think of the power to weight ratio,,

2 question,,

1) can you buy pulse jets small enough ??

2) how do you run the fuel to the spinning head ??

Jim

Jim
Buzz Buzz Buzz

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03-04-2007 09:46 AM  10 years agoPost 5
BEAR

Senior Heliman

Peterborough

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Have you ever heard a puls jet run?
I dont think it will go down too well at the feild they are F*cking loud and have only 1 speed! FLAT OUT!!

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03-04-2007 09:56 AM  10 years agoPost 6
Suteu Nicolae

Heliman

Bistrita,ROMANIA

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I have built one (reed valve pulse jet engine), is not so complicate. Hope next week adds some pictures!

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03-04-2007 10:08 AM  10 years agoPost 7
Yug

rrMaster

UK. Herts

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Pulse jet engine would be useless in a heli, but fun on a boat, car or plane. I believe they're illegal in the UK cos they're so bloody load.
1) can you buy pulse jets small enough ??
I think you'd have to make it
2) how do you run the fuel to the spinning head ??
Up the main shaft using a swivel coupling at the base.

Are you going to give it a go ?

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03-04-2007 10:19 AM  10 years agoPost 8
BEAR

Senior Heliman

Peterborough

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Hey Yug I dont think they are band in the U.K. as they fly them at the British N.A.Ts on control line models and someone put 1 on an rc plank it was in a model mag last year I think.
Dont think I would wont to be in the cage with a control liner tho
and its usualy older guys flying them!

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03-04-2007 10:42 AM  10 years agoPost 9
TOSH

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UK.Peterborough

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I believe they're illegal in the UK
That`s it. l want one.

Flybars. Who needs `em.

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03-04-2007 11:12 AM  10 years agoPost 10
Yug

rrMaster

UK. Herts

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03-04-2007 11:55 AM  10 years agoPost 11
nivlek

rrProfessor

Norfolk England

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From the BMFA Handbook :

Reaction motors
(1) Control Line
Control Line pulse jets may be flown under the
following conditions:
(a) That the express written permission of the
owner/controller of the site is obtained in advance
with due regard for noise considerations.
(b) That the express written permission of any
model flying club using the site is obtained in
advance.
(c) That monitoring of the area surrounding the
site for noise complaints is carried out on an ongoing
annual basis.
(2) Radio Control
Radio control pulse jets may be flown under the
following conditions:
(a) That the express written permission of the
owner/controller of the site is obtained in advance
with due regard for noise considerations.
(b) That the express written permission of any
model flying club using the site is obtained in
advance.
(c) That monitoring of the area surrounding the
site for noise complaints is carried out on an ongoing
annual basis.
(d) That all operators of such models on the site
shall hold a Power Achievement Scheme Fixed
Wing 'B'
(e) That CAA exemption certificates as required
are obtained and the conditions on them are
followed.
Any regulation specifically concerning reaction
motors does not apply to small solid-fuel units of the
Jetex type, nor to solid fuel rocket motors of the
Rapier type or to recognised Space Model power
units used in accordance with the appropriate BMFA
approved codes of practice.

At the end of the day , it gets dark .

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03-04-2007 03:13 PM  10 years agoPost 12
1stPlace

Senior Heliman

Ohio USA

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03-04-2007 06:23 PM  10 years agoPost 13
eyeflyhelis

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charlotte nc

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OUCaptain correct your your wrong

only you have the power to make no difference!

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03-04-2007 06:30 PM  10 years agoPost 14
eyeflyhelis

Elite Veteran

charlotte nc

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im thinking of building a small one & sticking itinto a plane. if it works well i'll build another and see if i can stick them onto a heli. might have to stick it into a 90 size .
in the plane it seems bigger will be easier to build

only you have the power to make no difference!

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03-04-2007 06:58 PM  10 years agoPost 15
1stPlace

Senior Heliman

Ohio USA

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My dad had a control line Mig 15. It was all aluminum and had a Tiger Jet pulse jet engine. It was insanely loud. We only flew locally it a few times. Every time we flew it the cops would show up and ask us to stop. People were complaining about the noise.
It was a lot of fun! We would fire it up in the driveway on the 4th of July. It would rattle the windows of every house on the street! It would only run about 10 seconds on the ground before the tail pipe was white hot!
And of course, the police would show up and ask us not to do it again. One time a Cop pulled in the driveway and told us to keep it down. When he looked at the Mig, he smiled and asked if we would start it for him. After it was shut down, he said "Wow that was crazy. Please don't do it again." Then he gave my dad his phone number and asked my dad to call him if we were going to fly it!
The police used to be so cool... What happened

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03-04-2007 07:14 PM  10 years agoPost 16
eyeflyhelis

Elite Veteran

charlotte nc

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wow that twin jet was awsome!!!

this video explains the jet a little and then they run it.

http://www.youtube.com/watch?v=fKML...related&search=
its pretty informative for someone with no knowledge of a plusjet

only you have the power to make no difference!

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03-04-2007 07:21 PM  10 years agoPost 17
eyeflyhelis

Elite Veteran

charlotte nc

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i have a few spare nitro pipes so i was thinking that with a nitro carb (for a control valve) might make a simple engine. might try it today.
my thinking is carb over exhuast intake, and the exhuast exite may need to be opened up more.
this would be just as a test not to run on the heli or plane- just a test point

only you have the power to make no difference!

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03-04-2007 07:32 PM  10 years agoPost 18
1stPlace

Senior Heliman

Ohio USA

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Sounds like a fire waiting to happen
The Tiger Jet is the only pulse jet engine I have experience with.
I have seen valveless pulse jet engines. Never seen one run though.
The little twin jet is cool. But, that is a tubine, not a pulse jet.

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03-04-2007 07:53 PM  10 years agoPost 19
falcon

Key Veteran

UK

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i have seen these pulse jets fly (planks)and its enough to make your ears bleed.
Fun for the first 3 minutes then you can't stand the noise.

www.m0kwr.com

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03-04-2007 07:55 PM  10 years agoPost 20
Yug

rrMaster

UK. Herts

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This might work............

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