Search found 21 matches

by Cita
Fri Jan 23, 2015 3:32 pm
Forum: Valveless pulsejet forum
Topic: "Replacement" for Gluhareff tipjet.
Replies: 3
Views: 2243

Re: "Replacement" for Gluhareff tipjet.

Downer ? Geen probleem hoor ! Een "helikopter" is eigenlijk een groot woord voor deze toestellen Metiz. Alhoewel voornamelijk de militairen interesse hadden (hebben ?) moet men qua prestaties niet te veel zoeken achter dit concept. Als je 15 minuten in zo'n toestelletje zit/hangt heb je het wel geha...
by Cita
Fri Jan 23, 2015 11:21 am
Forum: Valveless pulsejet forum
Topic: "Replacement" for Gluhareff tipjet.
Replies: 3
Views: 2243

Re: "Replacement" for Gluhareff tipjet.

This is the back-pack helicopter frame for which the pulse/ramjet could be used.
by Cita
Fri Jan 02, 2015 8:47 am
Forum: Valveless pulsejet forum
Topic: "Replacement" for Gluhareff tipjet.
Replies: 3
Views: 2243

"Replacement" for Gluhareff tipjet.

This idea is to find an "easy" replacement for the Gluhareff pressure jet engine as used on his helicopters. Based on Mr. Cotrill's Lady Jane Grey valveless pulse jet, because it has the same thrust as the Gluey G-8-20 (20lbs of thrust) I turned the Lady Jane Grey "inside-out" and use the hollow cen...
by Cita
Tue Apr 04, 2006 8:56 pm
Forum: Off topic forum
Topic: The Gyro-Jet
Replies: 20
Views: 9192

re: The Gyro-Jet

Very nice drawings and concept!! You need only one engine to pre-rotate the rotor as the engine blowing on the retreating side will add nothing to power the rotor,on the contrary. The rim on the rotor, or fan, has advantages but I have my doubts that it will be benefitial for a rotor in autorotation...
by Cita
Fri Mar 10, 2006 8:57 pm
Forum: Off topic forum
Topic: Backpack helicopter
Replies: 63
Views: 24027

re: Backpack helicopter

My apologies to EVERYONE who might be offended by my postings.


http://uk.groups.yahoo.com/group/back-packhelicopter


Cita
by Cita
Fri Mar 10, 2006 8:23 pm
Forum: Off topic forum
Topic: Backpack helicopter
Replies: 63
Views: 24027

re: Backpack helicopter

Fair enough Mr.Cottrill.

Cheers Cita.
by Cita
Fri Mar 10, 2006 6:20 pm
Forum: Off topic forum
Topic: Backpack helicopter
Replies: 63
Views: 24027

re: Backpack helicopter

Tom, I'm as calm as a man can be :D "Mayby expressing confusion over not being able to find....." is a very nice attempt to minimize what Mr. Ogorelec wrote but I'm not stupid. If you judge me by reading only what I have posted and dont care to read between the lines of what Mr. Ogorelec wrote than ...
by Cita
Fri Mar 10, 2006 11:30 am
Forum: Off topic forum
Topic: Backpack helicopter
Replies: 63
Views: 24027

re: Backpack helicopter

Excuse me for spelling your name incorrect Mr. Ogorelec. I did not know how difficult it was to search for the group but instead of bluntly saying that "there is no such group" or "yet you claim..." you simply could have said that you could not find it,you could even blame me for being so stupid not...
by Cita
Fri Mar 10, 2006 9:34 am
Forum: Off topic forum
Topic: map surveying question
Replies: 7
Views: 3233

re: map surveying question

I used to work in a surveyor team back in the old days when you needed 3 man and a lot of equipement. When the electronic theodolithe came on the scene a lot of things changed (one of them was that the team was reduced and that I was transferred to the design burea!!) and the time in the field was r...
by Cita
Fri Mar 10, 2006 9:03 am
Forum: Off topic forum
Topic: Backpack helicopter
Replies: 63
Views: 24027

re: Backpack helicopter

Rossco, I'm not offended in any way,thanks for posting the link! I also didn't know that yahoo didn't search world wide groups or that yahoo uk was clunky to search. I would have posted a direct link ....if I knew how to do it! I appreciate the fact that you come up for your members,however "there i...
by Cita
Thu Mar 09, 2006 9:12 pm
Forum: Off topic forum
Topic: Backpack helicopter
Replies: 63
Views: 24027

re: Backpack helicopter

yahoo groups uk-ireland
go to hobbies and crafts
search for :strap-on_helicopter

No need to be arrogant or angry.

Cita
by Cita
Thu Mar 09, 2006 2:50 pm
Forum: Off topic forum
Topic: Backpack helicopter
Replies: 63
Views: 24027

Re: re: Backpack helicopter

Bruno Ogorelec wrote:
Cita wrote:I just started a group on Yahoo about back-pack helicopters.
strap-on_helicopter@yahoogroups.co.uk

Cheers,
Cita
There's no such group on Yahoo Groups.
Yes there is!
"I cant find it" doesn't mean the same as "there is no such group".
Erik Bengtsson (peroxide propulsion) is a member.

Cita
by Cita
Mon Mar 06, 2006 3:57 pm
Forum: Off topic forum
Topic: Backpack helicopter
Replies: 63
Views: 24027

re: Backpack helicopter

I just started a group on Yahoo about back-pack helicopters.
strap-on_helicopter@yahoogroups.co.uk

Cheers,
Cita
by Cita
Sun Mar 05, 2006 8:16 pm
Forum: Rocket forum
Topic: Rocket belts and such
Replies: 34
Views: 16965

Re: re: Rocket belts and such

Bruno Ogorelec wrote:Isn't the duration of thrust for a rocket simply too short? The peroxide apparatus of the original flying belt could keep a man up for a few minutes.
The original Bell Rocketbelt could fly for 13 seconds.
Today flights of 25-30 seconds are possible.

Cita
by Cita
Sat Feb 25, 2006 10:04 am
Forum: Ramjet forum
Topic: cheap ramjet
Replies: 5
Views: 4647

Re: re: cheap ramjet

How big is the hole on the top where you unscrew the valve?. It must be smaller than the exhaust hole I suppose. Did you get some trust out off it?. Looks like the not so aerodynamically front and back could interfere whit that. With what where you blowing it?. Just curious. Leo. -will measure it b...