Black Lynx Engine

rainyday101 Tue May 30, 2017 2:13 pm

Ex Model Engines Black Lynx? Anybody used one? Opinions?

http://www.exmodelengines.com/product.php?productid=17871&cat=279&page=1

balogh Tue May 30, 2017 4:15 pm

I built myself a few of these from components and call them TeeDeeReedie. Very fast engines and spin the 5*4 black COX Int'l prop at higher than 20k when unload in the air. They run about 6min on 1/3 oz of fuel.

rainyday101 Tue May 30, 2017 6:20 pm

balogh wrote:I built myself a few of these from components and call them TeeDeeReedie. Very fast engines and spin the 5*4 black COX Int'l prop at higher than 20k when unload in the air. They run about 6min on 1/3 oz of fuel.

Thank you very much for the reply. That is what I was hoping to hear!

dckrsn Tue May 30, 2017 8:16 pm

Agreed with Andras, this combination
of parts and mods works well together.
I have an EX Model Lynx, and it's a
good, high reving engine.
Bob

**944_Jim** Fri Jan 05, 2018 12:14 pm

I know I'm asking late in the game...but what is special about the backplate?

I get the HD crank (longevity), and the Piston)cylinder (better flow).

Is the venturi on the backplate a special size?

Thanks in advance...off to do more searches.

balogh Fri Jan 05, 2018 12:21 pm

The venturi has larger diameter and thus restricts the flow less than the regular backplate. Nevertheless I still jam a small wire mesh into the KB backplate intake as a filter and see the engine performance retained without any impact by this small choking.

**944_Jim** Fri Jan 05, 2018 9:56 pm

Hi Balogh,

Thanks for the answer. I thought I read that some place (can't find where, though).

Does this then mean I need to pressurize the tank? I'm thinking uniflow or some method of pressure from the engine...but then how do we get pressure from the engine? Or am I over thinking it?

Any chance I can take a normal, white backplate and drill it out to the same size?
What is the size?

I'm just looking for ways to pep you product engine short of replacement.

Again, I appreciate the schooling!

balogh Sat Jan 06, 2018 1:30 am

You do not need to pressurize the tank because the venturi cross section at the spraybar is narrow enough to generate the same suction as in the regular backplates . The rest of the venturi is wider than regular backplates thus pressure losses in the KB are less.

crankbndr Tue Jan 09, 2018 8:49 am

This is the first engine I got from EX, very good runner with standard head.

getback Tue Jan 09, 2018 11:00 am

Nice engine run , what was the tach readings on it ? Very Happy

crankbndr Tue Jan 09, 2018 11:05 am

It was pushing 19K, one of my first vids and didn't realized tach was out of sight. As you can see it really sucked down the fuel quickly.

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