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Old Mar 23, 2011, 10:59 AM
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I don't think it was any particular year John, just a very slow transition. The same thing is going on now with many converting from glow to electric.

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Old Mar 23, 2011, 03:56 PM
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Also during that era, the model compression ignition engine (what we call modle diesel engines) became quite popular for a time. As they had no spark ignition system nor all the ancillary stuff to get it to work, like the ignition coil, points, and battery. so the diesel engine meant you could save a lot of weight at the time.
Then glow plugs came onto the scene and sort of killed them off in short order.
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Old Mar 23, 2011, 05:06 PM
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killed them off in short order.

Really? The advent of the glowplug in the USA caused the swing from spark ignition. Only a very few diesels were available of varying quality and never gained any popularity, not least because few modellers were familiar enough with them to operate them properly.

But to say that the gloplug killed off diesels is a calumny. Diesels were popular in Europe even during the latter years of WW2, following which they become the engines of choice therein, in the UK and elsewhere - to this day they remain extremely popular and surpass glows for many purposes.
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Old Mar 23, 2011, 05:32 PM
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That is correct for the USA. The Drone diesels came out just before the glow plug started being introduced and was fairly popular here in the USA for a while. But after the glow plug and glow engines came out, the Drone engines pretty much disappeared in short order. it was only span of a few years too. Along with any other diesels that were out there. i remember OK,McCoy and others having small diesels and they just didn't take off here in the USA either after the glow plug became popular. But some of those diesel engines were quite popular outside of the USA though. so they exported them overseas and didn't really try to sell them in the USA. The major competitor for the Drone that did them in was the venerable Fox .35 stunt engine. When the .35 took off, it was all over then. 1947 through 1949 or maybe a little longer. the glow plug equipped engines took over fast.
ref: http://modelenginenews.org/ad/drone.html
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Old Mar 23, 2011, 11:59 PM
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The Frog 500 was unique in that the engine first appeared as a glow, then as a sparkie.
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Old Mar 24, 2011, 04:18 AM
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Some model engines are as rare as rocking horse droppings - these fall in to the category of rocking horse's FOALS droppings ! Thanks to Alan Strutt.
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Old Mar 24, 2011, 11:40 PM
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Yet another twin-stack !
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Old Mar 26, 2011, 08:34 PM
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Trying to post a picture here, arggggghhhhh!
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Old Mar 26, 2011, 08:41 PM
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Here's an engine I picked up a from a good friend few years ago. Made in Canada, came from the East Coast. He was working out there. At the time it was installed in a huge free flight plane, sadly it was in very poor condition, I think it was about a 12 foot span. Several collectors have estimated it was made in the late 1930's to early 40's. I have an audio tape here somewhere of an interview with a relative of the builder. Apparently he made 50 singles and only a few of the twins. Has anyone ever seen one of these?


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Old Mar 26, 2011, 08:46 PM
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Not till now

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Old Mar 29, 2011, 11:24 AM
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Brown Jr. manual

I scanned and put into a .pdf format my Brown jr. manual for those interested.
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Old Mar 29, 2011, 01:56 PM
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Thanks, Leadchucker
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Old Mar 29, 2011, 03:28 PM
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New Gurl on the block

Another engine found it's way into my shop today. She's a Wahl Brown Jr new in the box. I bought her to run,so run she shall....soon.
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Old Mar 29, 2011, 03:50 PM
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Wow! Nice engine there leadchucker. Post a video of you running it. let us know how it runs.
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Old Mar 29, 2011, 06:21 PM
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Leadchucker, that's a nice looking engine. Looks brand new. Is it an original or a repo?
What are the specs?
Thanks
John
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