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Author Topic: How does a Revojet work?  (Read 15957 times)

Offline Geezer

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How does a Revojet work?
« on: 15/09/2009 05:37:15 »
My big brother had something called a Revojet (around 1955 I think). As I remember, it was really a sort of kite with rotating wings. It was really cool, because anything remotely associated with jets had to be cool in 1955! I remember him flying it on a beach on Orkney. The wind was so strong the string snapped. (Orkney is a dangerous place because you can get hit by airborne sheep.)



Anyway, why does a Revojet "fly"?
« Last Edit: 15/09/2009 05:54:49 by Geezer »


 

Offline Don_1

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How does a Revojet work?
« Reply #1 on: 15/09/2009 07:54:40 »
I can't say as I recall these Revojet thingys, but that's a fine piece of art. Have you studied da Vinci?
 

Offline Geezer

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How does a Revojet work?
« Reply #2 on: 15/09/2009 08:52:37 »
Yes, well very humorous I'm sure. But it's not intended to be artistic (although it obviously is). This is a serious piece of scientific research concerning the aerodynamic properties of sheep. Have you any idea how many sheep perish every year because they are blown into the North Sea?
 

Offline RD

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How does a Revojet work?
« Reply #3 on: 15/09/2009 12:43:59 »
Is it this ? ...



Quote
Palitoys Comet Revojet in BOAC livery, plastic fuselage and wings, with control mechanism, string and bobbin -
 Good Plus with a 54cm wing span in a Good illustrated box with instructions,

["Coronation" of Lizzy II was in 1953]
« Last Edit: 15/09/2009 12:58:21 by RD »
 

Offline RD

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How does a Revojet work?
« Reply #4 on: 15/09/2009 14:10:11 »
Amendment to diagram in the interests of scientific accuracy  :)
 
[How did you think they make tartan ?]
« Last Edit: 15/09/2009 14:13:09 by RD »
 

Offline Don_1

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How does a Revojet work?
« Reply #5 on: 15/09/2009 15:02:01 »
To ensure our sheepy doesn't get blown into the North Sea, I have devised a net to keep his high heels firmly on Terra firma.



Its what I call a Barnet Bahnet.
 

Offline Geezer

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How does a Revojet work?
« Reply #6 on: 15/09/2009 16:10:18 »
Is it this ? ...



Quote
Palitoys Comet Revojet in BOAC livery, plastic fuselage and wings, with control mechanism, string and bobbin -
 Good Plus with a 54cm wing span in a Good illustrated box with instructions,

["Coronation" of Lizzy II was in 1953]


Yes. I think that's it. Note the image on the box actually looks like a de Havilland Comet, but, as I remember, the thing inside the box didn't.  It could have been 1953.
« Last Edit: 15/09/2009 16:15:16 by Geezer »
 

Offline Geezer

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How does a Revojet work?
« Reply #7 on: 15/09/2009 16:19:04 »
Amendment to diagram in the interests of scientific accuracy  :)
 
[How did you think they make tartan ?]

Yes, that's a lot more accurate. I notice the sheepy is not exactly tartan yet, but I suppose that is taken care when the weave the multi-coloured wool into kilts and stuff.
 

Offline RD

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« Reply #8 on: 15/09/2009 17:19:57 »
... the image on the box actually looks like a de Havilland Comet, but, as I remember, the thing inside the box didn't. 

The toy may not have resembled a Comet but was probably equally robust ...
 http://en.wikipedia.org/wiki/De_Havilland_Comet#Comet_disasters_of_1954

BTW here is where I found the image of the box ... http://www.vectis.co.uk/auctiondet.php?item_id=410800
« Last Edit: 15/09/2009 18:07:30 by RD »
 

Offline neilep

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How does a Revojet work?
« Reply #9 on: 15/09/2009 17:28:54 »
Polite Notice From The Desk Of Sheepy:

Please keep an eye out for anything ewe deem libellous !

There has been a spate of libellous posts going on. Fortunately I am a sharp sheepy and nothing gets past me !
 

Offline Karen W.

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How does a Revojet work?
« Reply #10 on: 15/09/2009 17:44:38 »
These are great posts... LOL... Love the artwork and the quotes.. by the way I had never heard of the Revojet from the past but that looks like about the right time frame in the pictures Rd Posted...nice information RD.

 

Offline Karen W.

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« Reply #11 on: 15/09/2009 17:47:29 »
Polite Notice From The Desk Of Sheepy:

Please keep an eye out for anything ewe deem libellous !

There has been a spate of libellous posts going on. Fortunately I am a sharp sheepy and nothing gets past me !

Yes, he is quite the sharp Sheepy!
Nothing gets past him least it be a very sexy Ewe... He just melts like a popsickle in the sun! LOL.....
 

Offline Geezer

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« Reply #12 on: 15/09/2009 18:09:54 »
The toy may not have resembled a Comet but was probably equally robust ...
 http://en.wikipedia.org/wiki/De_Havilland_Comet#Comet_disasters_of_1954

Yes. Metal fatigue was not so well understood then. Shame, because they were really great planes. I've flown on them several times.
 

Offline neilep

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« Reply #13 on: 15/09/2009 18:24:11 »
I once attended an exhibition at the Comet Hotel in Hatfield. Alas, now, even the hotel has been renamed ! *le nostalgic sigh*
 

Offline LeeE

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How does a Revojet work?
« Reply #14 on: 15/09/2009 18:36:23 »
Lol...



Goodness me, that's the worst drawing of a D.H. Comet that I've ever seen   :D

The wings are almost the right shape but are back-to-front, and the engines weren't out on the wings, with a gap between them, but were right next to each other and located in the wing roots.
 

Offline Geezer

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« Reply #15 on: 15/09/2009 18:59:02 »
Lol...



Goodness me, that's the worst drawing of a D.H. Comet that I've ever seen   :D

The wings are almost the right shape but are back-to-front, and the engines weren't out on the wings, with a gap between them, but were right next to each other and located in the wing roots.
You're right. The wings are backwards! LOL
 

Offline Geezer

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How does a Revojet work?
« Reply #16 on: 15/09/2009 19:08:00 »
Lol...



Goodness me, that's the worst drawing of a D.H. Comet that I've ever seen   :D

The wings are almost the right shape but are back-to-front, and the engines weren't out on the wings, with a gap between them, but were right next to each other and located in the wing roots.

I just noticed that the windows in the drawing appear to be, prophetically, round. Had the actual aircraft copied the Palitoy illustration instead of using square windows, the disasters might never have happened.
 

Offline neilep

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How does a Revojet work?
« Reply #17 on: 15/09/2009 20:12:03 »
Lol...



Goodness me, that's the worst drawing of a D.H. Comet that I've ever seen   :D

The wings are almost the right shape but are back-to-front, and the engines weren't out on the wings, with a gap between them, but were right next to each other and located in the wing roots.
You're right. The wings are backwards! LOL





Could it be that this model was of the erstwhile now defunct " Comet Reverse ". De Havillands attempt at a backwards flying Comet ?..yes..yes..I am sure this is true !!
 

Offline Geezer

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« Reply #18 on: 15/09/2009 20:48:14 »
Here's a link that reveals what is inside the box. Pretty cool, eh?

http://www.astonstoyauctions.co.uk/images/lots/090730/407.jpg
 

Offline RD

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« Reply #19 on: 15/09/2009 21:15:30 »
Maybe the backwards wings were to avoid breach of copyright: it's similar to the Comet but not the same,
 (the word "Comet" would not be protected by patent/copyright but its image would be).

Re: original question

I think the Magnus* effect may be responsible ... http://wapedia.mobi/en/Magnus_effect#5.

(* Nothing to do with Dr Pyke, although his arms almost moved sufficiently to cause flight  :) )

« Last Edit: 15/09/2009 23:58:22 by RD »
 

Offline Geezer

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« Reply #20 on: 15/09/2009 23:48:03 »
Great! Thanks. That looks like the explanation.

It also might explain the airborne sheep phenomenon too. Presumably if you can get a sheep to spin fast enough about its axis it would experience some aerodynamic lift. Would you think?

I seem to remember my brother's Revojet had more of a Dan Dare look to it than a D H Comet. Perhaps that was after some of the disasters and Palitoy thought it wise to distance itself, or maybe D H went after Palitoy for infringement. I'm pretty sure my Dad recorded the Revojet flying on 9.5 mm film. I'll ask my brother if the film survived. It would be nice to put it on Youtube.
 

Offline LeeE

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« Reply #21 on: 16/09/2009 12:21:23 »
I just noticed that the windows in the drawing appear to be, prophetically, round. Had the actual aircraft copied the Palitoy illustration instead of using square windows, the disasters might never have happened.

Indeed.  How ironic is that?
 

Offline LeeE

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« Reply #22 on: 16/09/2009 12:55:27 »
Maybe the backwards wings were to avoid breach of copyright: it's similar to the Comet but not the same, (the word "Comet" would not be protected by patent/copyright but its image would be).

Copyright wouldn't have been an issue with regard to images of the aircraft as it is not the appearance of the aircraft that has been copyrighted but its design.  Were appearance to be copyrighted it would prevent anyone from producing photographs, paintings or drawings of anything that was manufactured.  The one exception to this, that I've heard of, is the display of lights on the Eiffel Tower.  In this case, it is not the design of the bulbs, the control system or the way that the lighting has been implemented that has been copyrighted but the particular pattern that the lights make, but then in this case it is precisely the appearance that counts.

The 'Comet' name is, or would have been, copyrighted though.  Funnily enough, a U.S. company has claimed the copyright on the name 'Liberator' and has objected to flightsim developers using the name 'Liberator' for their B-24 models.  Quite how this company acquired the copyright is a bit of a mystery to me, as the name 'Liberator' originated with the RAF and was only subsequently adopted by the USAAC.  Consolidated, who made them, just called them B-24s.
 

Offline RD

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« Reply #23 on: 17/09/2009 01:51:59 »
Copyright wouldn't have been an issue with regard to images of the aircraft as it is not the appearance of the aircraft that has been copyrighted but its design.  Were appearance to be copyrighted it would prevent anyone from producing photographs, paintings or drawings of anything that was manufactured. 

A drawing / painting “inspired by” a copyrighted design would be a derivative work and could infringe the original copyright if not sufficiently different from the original.

The 'Comet' name is, or would have been, copyrighted though.

If that was so everytime Sir Patrick Moore used the word "Comet" in his astronomy books he would have to obtain permission from the copright-holder and pay a reproduction fee to use the word.
« Last Edit: 17/09/2009 02:19:52 by RD »
 

Offline Geezer

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« Reply #24 on: 17/09/2009 03:26:41 »
I really "luffed" (as Neil might say) Patrick Moore. (Not in the Biblical sense, you understand.) I did not intend to launch a legal debate. That might best be conducted at www.nakedlawyers.com

 

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