Norvel .40 size (6.5cc) gasoline glow engine

[KenP51]

I have been following the Norvel .40 size (6.5cc) gasoline glow engine thread on RCU. I asked the OP ( he is doing extensive testing of the engine before the Norvel releases it ) if it would be suitable for control line.

"Ken,
I don't know if there are plans for a CL version of this motor, but if you use throttle anyway, I could see this working well for CL stunt with the right prop. If I run the needle a bit on the rich side I can get a nice 4-2-4 break like the old Fox 35's.
Bill "
And then his next post stated "Hi Ken,
I have just confirmed with NV that they will be offering a CL version of the Gas 40. Bill"

Here is the link to the thread
http://www.rcuniverse.com/forum/m_11287797/mpage_1/key_/tm.htm

Post 136 and 137 are where the above dialog is.

Just thought you all might be interested.

Ken

[Jim Kraft]

I wonder yet how they are getting straight gasoline to run in a "glow" engine. They either have some kind of a special plug that know one else knows about, or there is more to it than what they are letting on. A normal glow plug will not run a glow engine very well on gasoline when the battery is removed if at all. It will be interesting to see what the have done to make it work. So far I have not seen an explantion of how it works, just that it does.

[Avaiojet]

Interesting design.

Charles

[qaz049]

I wonder yet how they are getting straight gasoline to run in a "glow" engine. They either have some kind of a special plug that know one else knows about, or there is more to it than what they are letting on. A normal glow plug will not run a glow engine very well on gasoline when the battery is removed if at all. It will be interesting to see what the have done to make it work. So far I have not seen an explantion of how it works, just that it does.

It seems to be a rapidly developing technology. There are a few of these engines (apparently) being developed by major manufacturers like OS and Enya.

They seem to be fairly normal glow engines with a special glow plug and a different r/c throttle. Timing and compression ratio are unknown. Fuel seems to be just petrol ("gasoline") and oil.

While they make much of it being a special oil, it seems to just need to be soluble in petrol. There's no shortage of those around in Karting shops.

For well over sixty years, the conventional wisdom has been that the Platinum Alloy/ Methanol relationship ( "The catalytic reaction" ) has been a special happy accident of nature.

For a while now it has been obvious that Ethanol can replace the former and work as well with a hotter glowplug and more compression.

Class B Team Racing enthusiasts have also been running 20% unleaded petrol in their fuel with excellent power and increased range since the mid 1960's.

One of the most popular fuels (Taylor brew) contains no methanol what so ever.

So clearly 2-stroke glow engines can be made to run satisfactorily on a range of Hydro-Carbon based fuels.

I guess we just have to wait till the NV engines are released and reviewed.

Ray

 

[Phil Bare]

Hello Ray, I would be interested to know morer about 'Taylor Brew'. Can you point me in the direction for more info on it?
Regards, Phil Bare.

[qaz049]

Hello Ray, I would be interested to know morer about 'Taylor Brew'. Can you point me in the direction for more info on it?
Regards, Phil Bare.

Phil,

I'll dig it out.

Ray

[Phil Bare]

Ray, I appreciate it.

Phil

[Brian Hampton]

I suspect this is the article on the Taylor Brew that Ray mentioned.
http://dkd.net/clmodels/acln/acln111.pdf

I even got a mention in the references .

[Phil Bare]

Thanks Brian, it looks like that info will require some serious study time.                    Phil Bare

[qaz049]

I suspect this is the article on the Taylor Brew that Ray mentioned.
http://dkd.net/clmodels/acln/acln111.pdf

I even got a mention in the references .

No, that's not it!

I meant the B Team Race Brew published by Charlie Taylor in the Aeromodeller in 1961.

I've found the articles and have combined them into a pdf file which should be attached below.

We used it competitively as recently as 10 y/o and it worked particularly well in both an ETA .29 6c and a modern Norvel .25 PB.

It's similar to those formulations in Lance's article but the significant chemical missing is Methanol and one of it's replacements is Petrol (Gasoline), so it's right on topic. I'm sure that many of the other brews  in Lances article would work just as well.

Taylor Brew (Circa 1961, 2002)

20% Castor oil (Castrol M)
20% Nitro Methane
20% Iso Propyl Alcohol (IPA)
20% Benzyl Alcohol
20% Unleaded Gasoline (100 Octane)

Ray

[Phil Bare]

Thanks Ray,  It is always interesting to see things that have been done by others and at different times.  The idea of useing all gasoline and what sort of plug it takes to do it is interesting.

[KenP51]

It does use a special glow plug. The plug sounds like it is very rugged and long lived. And uses normal off the shelf oil (unlike what Enya made).
At a normal wight for a .40 size engine and a smaller fuel load, it just might make a good CL engine considering that it will 4-2-4 break. A lot of modern glow engines don't manage that very well.

There is also a .60 now available, The EVO .60 gas. But with it's required ignition system. it is at 22 ounces. Kind of chunky for CL and add to that the battery. Also it does not give the 4-2-4 break. Although a sweet engine and now being sold (the Norvel is not yet on the market).

Also a lot less engine slobber on the plane to clean up.

But these developments are worth keeping an eye on I think.

Sure Would like to know what makes the Norvel's plug work with gas.

Ken