Jetex Blog

An online resource covering the technical and historical aspects of small sustained thrust micro rocket motors for use in model airplanes and other craft.

Recent Jetex Articles for the Society of Antique Modellers

In a previous life, I published more than a hundred Jetex and Rapier-related articles in SAM (35) Speaks, the prestigious monthly journal of the Society of Antique Modellers in the UK (chapter 35). 

Copies of these were available month by month on the Jetex.org website, and PDF copies were sent out by email to jet modellers all over the world.

I would also add that a data disc of all my 'Jetex' articles, from 2002 was put together, and  is still available for a small fee.

Earlier this year I resumed writing articles about the UK 'small jet scene' and these have been published by the estimable Colin Hutchinson, the new editor of SAM (35) Speaks.  The response to these has been quite favourable, so I am offering PDF's of my new scribblings to any interested modeller.

Here is the first page of the Spring 2015 article:

JJJ first page

 

 

And here is a taster of last summer's offering:

SAM Summer page 1

 

There are two more, autumn and winter, articles in the pipeline.

My articles are of course UK centered, but I'm hoping to include more 'international' news via a wider distribution of these which will result in feedback from the many jet modellers overseas.

If you would like copies, please contact me with your email address.  In time, I will compile a subscription list, and the latest 'Jetex and Rapier' can be sent out to all those on the list automatically.

Any comments about the articles, and contributions to future articles, are very welcome.

 

Dan Dare Exhibition, Herne Bay 29 April - 1 July 2...
Mounting Rapiers in Models Part 2.
 

Comments 7

Rob Beale on Monday, 09 November 2015 10:53

I had a Jetex 50 and when it went, it was surprisingly powerful and produced some surprisingly good flights. Wish I knew what happened to the motor and would love to have another go.

I had a Jetex 50 and when it went, it was surprisingly powerful and produced some surprisingly good flights. Wish I knew what happened to the motor and would love to have another go.
Ron Wheeler on Wednesday, 30 December 2015 14:18

Hi Roger,
Please include me in your regular updates as above ~
"If you would like copies, please contact me with your email address. In time, I will compile a subscription list, and the latest 'Jetex and Rapier' can be sent out to all those on the list automatically"
I had quite a bit of dialogue with you a few years back, mainly re availability of Rapier and you managed to get me a good supply which i bought from you at Old Warden. have only just stareted to catch up as it all seemed so fraught in suply terms but not looks as though it has come good again. Hope so.#Found this link via the VTST letters. I built a decent size Vulcan B1. which flew very well on L2's so must get back to it.
Very best and Good Health and Happiness for the future
Ron Wheeler

Hi Roger, Please include me in your regular updates as above ~ "If you would like copies, please contact me with your email address. In time, I will compile a subscription list, and the latest 'Jetex and Rapier' can be sent out to all those on the list automatically" I had quite a bit of dialogue with you a few years back, mainly re availability of Rapier and you managed to get me a good supply which i bought from you at Old Warden. have only just stareted to catch up as it all seemed so fraught in suply terms but not looks as though it has come good again. Hope so.#Found this link via the VTST letters. I built a decent size Vulcan B1. which flew very well on L2's so must get back to it. Very best and Good Health and Happiness for the future Ron Wheeler
Guest - Scott on Friday, 01 January 2016 15:08

Love the F-11! Nice work!

Love the F-11! Nice work!
Roger Simmonds on Friday, 01 January 2016 15:23

High Scott,
thanks for the comment. I was quite pleased with the F-11 Tiger, which flies surprisingly well with a Rapier L-2. Tell me if you wouuld like more details.
Also, the December article has just been published. APDF will be sent on request.

High Scott, thanks for the comment. I was quite pleased with the F-11 Tiger, which flies surprisingly well with a Rapier L-2. Tell me if you wouuld like more details. Also, the December article has just been published. APDF will be sent on request.
Guest - Scott on Monday, 08 February 2016 22:51

I would like to see more details on the F-11 Tiger. It looks really neat!

I would like to see more details on the F-11 Tiger. It looks really neat!
Guest - Bruce Ogden on Sunday, 21 February 2016 22:49

Hi Roger,
Yes still around building and flying my inexhaustible supply of pellets. Am also now flying miniature r/c models indoor all walnut scale. Am also now starting to RC my larger jetex 100 models with the these eflite mini bricks and lipol batteries.
Reason for the mail I have been loading my 30 jetex C motors going up to the park flying them all the time. Some of the motors have had up to 50 reloads and the motors are starting to show signs of wear especially in the size of the thrust hole and that end bell which no matter how you try will still corrode. I toyed with the idea of a whole new motor aluminium C and Ced but that also would only be viable for some time. After much thought I reasoned that the cases were fine the spring holder part was fine what was needed was a new end bell in hard 316 stainless steel. As i am still the R and D director of my company I had one of my engineers pursue the subject of a duplicate SS end bell.
Suffice to say we were successful and I now have 30 of these amazing end bells that I am now using which do not corrode and provide identical thrust from motor to motor. So how much did these little things cost, consider tooling was needed and the thrust hole had to be precise and its all done on a 5 axis hytachi C and C lathe each taking 6 very small tools and time to make, about $100 each yes you got it 50 English pounds each (yes they are absorbed in some other project). Yes they are the answer. Last year I had punches made to make washers and wire screens as those items are getting a bit thin in my supply. I have now since beginning of last year started loading motors differently saves on fuse and fizzers. Don't get me started on the screen being part of the combustion process and it has some calorific input its all good meaning but flawed comment and can prove it as I have made screens from different materials steel to ss and small to fine openings they are necessary to prevent blocking the orfice nothing else. To date I have used in excess of 1500 pellets mainly 50 size and am down to my last 50 tins of sebel fuel, but don't worry at last count 200 boxes of tiger still to go.
Regards,
Bruce Ogden

Hi Roger, Yes still around building and flying my inexhaustible supply of pellets. Am also now flying miniature r/c models indoor all walnut scale. Am also now starting to RC my larger jetex 100 models with the these eflite mini bricks and lipol batteries. Reason for the mail I have been loading my 30 jetex C motors going up to the park flying them all the time. Some of the motors have had up to 50 reloads and the motors are starting to show signs of wear especially in the size of the thrust hole and that end bell which no matter how you try will still corrode. I toyed with the idea of a whole new motor aluminium C and Ced but that also would only be viable for some time. After much thought I reasoned that the cases were fine the spring holder part was fine what was needed was a new end bell in hard 316 stainless steel. As i am still the R and D director of my company I had one of my engineers pursue the subject of a duplicate SS end bell. Suffice to say we were successful and I now have 30 of these amazing end bells that I am now using which do not corrode and provide identical thrust from motor to motor. So how much did these little things cost, consider tooling was needed and the thrust hole had to be precise and its all done on a 5 axis hytachi C and C lathe each taking 6 very small tools and time to make, about $100 each yes you got it 50 English pounds each (yes they are absorbed in some other project). Yes they are the answer. Last year I had punches made to make washers and wire screens as those items are getting a bit thin in my supply. I have now since beginning of last year started loading motors differently saves on fuse and fizzers. Don't get me started on the screen being part of the combustion process and it has some calorific input its all good meaning but flawed comment and can prove it as I have made screens from different materials steel to ss and small to fine openings they are necessary to prevent blocking the orfice nothing else. To date I have used in excess of 1500 pellets mainly 50 size and am down to my last 50 tins of sebel fuel, but don't worry at last count 200 boxes of tiger still to go. Regards, Bruce Ogden
Roger Simmonds on Monday, 22 February 2016 07:59

Thanks Bruce,
this is most interesting - have you any photos of your models? Also, I would be most interested in your Jetex with RC exploits!

My last article in 2015 featured a radio controlled Bell X-1. Have you seen it? It is available as a PDF (the article not the model.

Thanks Bruce, this is most interesting - have you any photos of your models? Also, I would be most interested in your Jetex with RC exploits!:) My last article in 2015 featured a radio controlled Bell X-1. Have you seen it? It is available as a PDF (the article not the model.
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