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Cox Engine of The Month
Mystery motor
Page 1 of 1
Re: Mystery motor
Welcome to the forum.
Well the caption to the picture states it’s a ED Mk2 penny slot diesel.
http://soaring-sailing.blogspot.com/2013/04/ed-mkii-penny-slot-diesel-motor.html?m=1
Well the caption to the picture states it’s a ED Mk2 penny slot diesel.
http://soaring-sailing.blogspot.com/2013/04/ed-mkii-penny-slot-diesel-motor.html?m=1
Jason_WI- Top Poster
-
Posts : 3123
Join date : 2011-10-09
Age : 48
Location : Neenah, WI
Re: Mystery motor
So that would make it a 2cc.
Oldenginerod- Top Poster
- Posts : 3969
Join date : 2012-06-15
Age : 61
Location : Drouin, Victoria
Re: Mystery motor
Sceptre Flight has two articles on its latest version that came out a year later, renamed Competition Special. Jason_WI's article has a link that goes into the history of the engine.
Sceptre Flight: ED Competition Special (2nd article)
Later version did away with the exhaust stack, 0.122 C.I., 6 oz. weight, added SPI with increase to 0.109 HP at 7,000 RPM, swung an 11" prop, was used to power free flight aircraft in the 4' wingspan range -
Sceptre Flight: ED Comp Special
Apparently the less powerful ED Penny Slot Mk-II was very popular in 1947.
Sceptre Flight: ED Competition Special (2nd article)
Later version did away with the exhaust stack, 0.122 C.I., 6 oz. weight, added SPI with increase to 0.109 HP at 7,000 RPM, swung an 11" prop, was used to power free flight aircraft in the 4' wingspan range -
Sceptre Flight: ED Comp Special
Apparently the less powerful ED Penny Slot Mk-II was very popular in 1947.
modelenginenews.org wrote:Regardless of who was responsible, the original E.D. 2cc design was quickly transmuted with relatively minor changes into the initial version of the famous E.D. Mk II "Penny slot model" (as it soon came to be colloquially known). The E.D. Mk II made its market appearance by that name in February 1947 and was energetically promoted and further developed from that point onwards.
GallopingGhostler- Top Poster
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Posts : 5295
Join date : 2013-07-13
Age : 70
Location : Clovis NM or NFL KC Chiefs
Re: Mystery motor
I'd heard of the "Penny slot" engine before and assumed that it referred to the exhaust stack looking like the slot on a slot machine. It actually referrs to the unusual compression screw which is designed to use a coin to adjust it, not a tommy bar like most diesels use.
Oldenginerod- Top Poster
- Posts : 3969
Join date : 2012-06-15
Age : 61
Location : Drouin, Victoria
Re: Mystery motor
It took me a second look at the top of the head then realized too that it referred to the compression screw. Neat idea.
NEW222- Top Poster
- Posts : 3892
Join date : 2011-08-13
Age : 45
Location : oakbank, mb
Re: Mystery motor
Neat idea, but where would one actually find a coin these days...?
Does it not take credit cards or swish?
Does it not take credit cards or swish?
Surfer_kris- Diamond Member
- Posts : 1905
Join date : 2010-11-20
Location : Sweden
Re: Mystery motor
A credit card would not be strong enoughSurfer_kris wrote:Neat idea, but where would one actually find a coin these days...?
Does it not take credit cards or swish?
Seriously, while it might seem a cool idea, can you imagine fumbling around with a penny coated in castor oil trying to adjust the compression?
Oldenginerod- Top Poster
- Posts : 3969
Join date : 2012-06-15
Age : 61
Location : Drouin, Victoria
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