Vintage FROG 80 Model Engine

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Circa 1957

Design History:

Designed and manufactured in Britain in 1957 it was a direct descendant of the Frog 50 which had up to that time achieved a high degree of popularity. 

Design Features:

conventional reverse-flow scavenged crankshaft front rotary valve (FRV) ;

Over square chamber design;

Twin exhaust stacks;

Case hardened steel cylinder liner with integrally-machined cooling fins;

Iron piston; and

steel counter piston with a flange limiter at the top and an O-ring seal.

Specifications:

Bore 10.16 mm;

Stroke 9.91;

Displacement 0.804 cc;

Weight 54 gm;

Max power .051 BHP

Maximum speed 11,000 RPM

Observations:


Uploaded by valic000 on Feb 26, 2012
Today I like to show another lovely little diesel.Its the Frog 80. This engine from my growing collection is in superb condition. In fact its 55 years old but in like new condition. Its untouched in all those years. No marks on the screws, a very smooth feeling when turned by hand. It feels almost like a ball bearing version. Also very strong compression with zero play anywhere.
The Frog company made a lot delightful diesels in the past. In my opinion also they made really lovely engine castings too. Lots of attention to details, with superb finishes.
I have 4 frog engines and there are all very well made. Still must run the 3,5 BB diesel engine. And that must be a real screamer. It looks very powerful to me. I hope to run him soon here on my channel. Subscribers are always welcome.Thanks for watching,I hope you like it...and more lovely old engines on my channel!

http://youtu.be/kfmajqUpmCk

This posting is prepared in collaboration with YouTube Channel valic000 Visual material and observations are by valic000 

Taifun Foxie 0.44 cc Displacement

 Circa 1960 Foxie Prototype

Design History:-
Designed and developed by Hans Hoernlein in 1960 in Germany for the Graupner hobby company. Originally conceived as a glow engine and converted to diesel. The engine was never mass produced and is today very rare.

Design Features:-
The Taifun Foxie is very similar to the early Cox 049 Baby Bee;
In fact Hans Hoernlein manufactured his first Prototype using Cox Babe Bee parts;
Rear Induction via rotary disc valve.

Specifications:-
Bore 8.0 mm
Stroke 9.0 mm
Rpm 18,000 rpm
Power 0.04 Hp
Total combustion 0.44 cc
Weight 35 gram


Observations:-
It was designed by Hans Hoernlein, the man behind the fantastic Taifun engines. The orginal engine was conceived as a glow engine. The Graupner Hobby Company thought at the time, that the future was in the glow engines. The Taifun diesel era came slowly after many successful years, to a end. Only the Bison and Sprint along with the Foxie were the only Taifun glow engines. A lot of the Foxie parts were  already produced include the boxes when the decision to suspend production came. Only 5 engines were given for a test, to modelers who were close employees or friends to the Graupner company.
I don't know whether the engine did not perform well, or if the costs were too high was the factor which caused the decision of Johanes Graupner, not to produce the engine. But, because of this decision Hans Hoernlein left the company and started producing engines under his own label..the "Profi" engine line.
My little  engine is built as a diesel version by Ronald Valentine, the master of miniature model engines. Because of the reardisc induction, its possible to run it at high RPM. The engine shown here is not yet run-in and the propeller was also on the big side, that's why it is not running at full speed....but a lovely little diesel....that's for sure! Happy to have him in my collection.
Thanks for watching!

This posting is prepared in collaboration with YouTube Channel valic000
Visual material and observations are by valic000



MAKE YOUR OWN MODEL DIESEL FUEL- FREE BOOK SHOWS YOU HOW; GET IT AT THE ENGINE TRADING POST
Download book at;
http://www.wix.com/crockerdh/my-store#!