Vintage Ramjet Model Engine Plans [e-Bay]

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WebPilot
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Re: Vintage Ramjet Model Engine Plans [e-Bay]

Post by WebPilot » Fri Dec 24, 2004 8:41 pm

Marten,

>>I, too, made one of these. I made mine back in the spring. The plan I followed made no mention of a tray.

>WOW! How much time did you spend building the engine exactly as shown in the plan? Just looking at the tiny sheet metal pieces the "spider" is made from...And the fuel reservoir, it's a CO2 or N2O cartridge, isn't it?

I don't remember exactly. Sometimes what I tried work, and othertimes, did not. You know exactly what I mean. It is a Co2 cartridge.

>The engine is really much nicer than every single on of my "rebuilds".

Thanks. I am quite proud of how it turned out, which is why it rests on a little stand I made for it. I thought you, of all people, would enjoy looking at it.

Later,

-fde
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Re: Vintage Ramjet Model Engine Plans [e-Bay]

Post by steve » Fri Dec 24, 2004 10:14 pm

where did you get the little nozzle for it? I've been looking around for months with no luck. I checked in an auto parts store and when I described to the guy there what I was looking for he gave me one of those "how the hell should I know?" kind of looks.
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Re: Vintage Ramjet Model Engine Plans [e-Bay]

Post by Tom » Fri Dec 24, 2004 11:04 pm

I found no end of cool little things in a freinds garage, including some nozzles from a furnace, they might be what you are looking for. Bete probably have a match and then some.

Tom
Experience speaks more then hypothesizing ever can. More-so in chemistry.

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Re: Vintage Ramjet Model Engine Plans [e-Bay]

Post by WebPilot » Sat Dec 25, 2004 12:39 am

steve wrote:where did you get the little nozzle for it? I've been looking around for months with no luck. I checked in an auto parts store and when I described to the guy there what I was looking for he gave me one of those "how the hell should I know?" kind of looks.
I get those looks when I need a part for my car, sometimes.

You may luck out as Coffee suggests, but I could not find anything suitable to use. So, I made one:

Image

Later,

-fde
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Re: Vintage Ramjet Model Engine Plans [e-Bay]

Post by mk » Sat Dec 25, 2004 4:55 pm

WebPilot wrote:You may luck out as Coffee suggests, but I could not find anything suitable to use. So, I made one:
I think Steve (and me, too) want(s) to know how you did get such a tiny hole in the threaded bolt. The smallest drills I can get are 0.5mm in diameter, sometimes only 0.8mm drills are available. Actually I'm using a 50th fuel jet, what means the hole diameter is 0.5mm.
I think the smallest BVF carburetor fuel jets are 0.3mm or so. But I don't know whether they feature M5 threads then...hmmm.
mk

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Re: Vintage Ramjet Model Engine Plans [e-Bay]

Post by Tom » Sat Dec 25, 2004 5:16 pm

I know that some model shops i go to stock tiny bits, so easy to snap, but its not taht much for a set. I'll take a closer look on tuesday if you want.

Tom
Last edited by Tom on Sun Dec 26, 2004 12:30 am, edited 1 time in total.
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Re: Vintage Ramjet Model Engine Plans [e-Bay]

Post by WebPilot » Sun Dec 26, 2004 12:01 am

Image


Try to find a #80 (0.0135" Ø, or diameter) drill bit.
Last edited by WebPilot on Mon Dec 27, 2004 11:17 am, edited 4 times in total.
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Re: Vintage Ramjet Model Engine Plans [e-Bay]

Post by mk » Sun Dec 26, 2004 9:59 am

Hmmm...I'll have to see where to get really small drills or smaller M5 threaded fuel jets (mostly from BVF carburetors).
mk

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Re: Vintage Ramjet Model Engine Plans [e-Bay]

Post by steve » Sun Dec 26, 2004 3:08 pm

WebPilot wrote:Try to find a #80 (0.0135" Ø, or diameter) drill bit.

Later,

-fde
crap, my smallest is .022in
I'll have to start looking around in all the hardware stores now.
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Re: Vintage Ramjet Model Engine Plans [e-Bay]

Post by WebPilot » Mon Dec 27, 2004 11:41 am

crap, my smallest is .022in
I'll have to start looking around in all the hardware stores now.
I successfully found bits in a local hobby shop. There has to be one close to you in Connecticut and also close to Marten in Germany. If not, try mail order or online - look for a supplier of flying model airplane parts and kits.

Buy more than 1 of whatever size you desire.

If you break it (I did), don't throw the shank away.
  • They are made of good quality steel and can be used as dowel pins.
  • If you grind (with Dremel cut-off wheel) away the fluted end, and chamfer the resulting burr off, you have a nice "drift" with which to try and "press out" the remnant left in the nozzle (tapping it with a small hammer).
Later,

-fde
Last edited by WebPilot on Mon Dec 27, 2004 12:10 pm, edited 1 time in total.
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Re: Vintage Ramjet Model Engine Plans [e-Bay]

Post by WebPilot » Mon Dec 27, 2004 11:45 am

Image

I found this on the Internet.

Trying not to look at (and want - he,he) the 707, I was especially interested in the boxed kit of the 601 and the coppery color of the pic below it showing the thrust enhancer "gondola".

Could these units have been made of Cu? Naah, probably copper plated steel for rust protection while in the box.

Later,

-fde
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Re: Vintage Ramjet Model Engine Plans [e-Bay]

Post by mk » Mon Dec 27, 2004 12:56 pm

These M.E.W. guys really found a market niche.
They sold obviously soooo nice and simple toys, which were (and still are) no toys and not as simple to build when someone wanted (and still wants) to get the same results in look and operation.

I doubt the boxed 601 was 100 percent made out of copper. Surely copper plated steel. Then the brazing or welding work wouldn't be visible and the engine really does look more precious this way.
I don't know if rust protection was also a target or even the main target (Were the "normal" 601s made out of mild or stainless steel?; How expensive and how available was stainless steel these days?).
mk

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Re: Vintage Ramjet Model Engine Plans [e-Bay]

Post by WebPilot » Mon Dec 27, 2004 1:13 pm

mk,

I, too, think these toys are so cool!
mk wrote: I don't know if rust protection was also a target or even the main target (Were the "normal" 601s made out of mild or stainless steel?; How expensive and how available was stainless steel these days?).
I don't know about the cost of stainless in those days. There was still a lot of military surplus floating around that could be had for cheap.

However, on page 2 of the couple of sheets that Bruno posted, it states:
For prolonged storage soak engine in kerosene to prevent rust.
So, I believe it was made from mild steel.

Please Note:
I am unable to view your video (mew_601_type_running.wmv) of the MEW you posted. I did successfully download it, and can hear it, but since I removed IE from my machine, I am no longer able to upgrade any Microsoft products such as Windows Media Player (I am missing a codec). Thank-you Microsoft engineers!

Have you converted this to a different format (e.g. .avi? mpeg?)

Later,

-fde
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Re: Vintage Ramjet Model Engine Plans [e-Bay]

Post by mk » Mon Dec 27, 2004 1:29 pm

Forrest,
are you able watching other WMV files?
Maybe it's a question of compression rate or something else of the settings in MovieMaker I changed.
Hmmm...I'll send a WMV again in standard settings when I don't have an MPG file any more.

Oh, yes, when the "normal" 601 has to be soaked in kerosene it is surely made out of mild steel.

I found small drills on eBay (but only via google)!
Here's the link for Europeans searching such drills, too:
http://stores.ebay.de/1-modellbauprofis ... ayZ2QQtZkm
mk

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Re: Vintage Ramjet Model Engine Plans [e-Bay]

Post by Mark » Mon Dec 27, 2004 2:57 pm

I bought some of these, and yes you do have to be careful not to break them and wear eye protection when using your dremel.
Mark
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