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Search: Posts Made By: DarZeelon
Showing results 1 to 17 of 17
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Forum: Glow Engines
11-25-2006, 06:09 AM
Replies: 89
Views: 6,122
Posted By DarZeelon

RE: Why Are Nearly All Kits and ARFs Incorrectly Designed?

Dave,


I absolutely agree with you that fuel pressure is important.
I also agree that a pump/regulator pressurized fuel system, whether is it Perry, Iron-Bay, Cline, or YS is superior to any...
Forum: Glow Engines
11-25-2006, 12:16 AM
Replies: 89
Views: 6,122
Posted By DarZeelon

RE: Why Are Nearly All Kits and ARFs Incorrectly Designed?

Hugh,


I read what you repeatedly wrote here, in several of your posts.

Take that 'standard fuel tank' and turn it on its side (leaving all the innards as they were)...


Now, where...
Forum: Glow Engines
11-25-2006, 12:03 AM
Replies: 89
Views: 6,122
Posted By DarZeelon

RE: Why Are Nearly All Kits and ARFs Incorrectly Designed?

Dave,


In a properly designed model, the fuel tank would be located so its center-line is at the same level as the carburettor spray-bar is designed to be, according to the building...
Forum: Glow Engines
11-24-2006, 11:41 PM
Replies: 89
Views: 6,122
Posted By DarZeelon

RE: Why Are Nearly All Kits and ARFs Incorrectly Designed?

Hugh,


Again, read my posts #66 and #71...





What 'bubbling pressure differences" are you talking about now?
Forum: Glow Engines
11-24-2006, 02:28 PM
Replies: 89
Views: 6,122
Posted By DarZeelon

RE: Why Are Nearly All Kits and ARFs Incorrectly Designed?

High,


Please reread all my posts in this thread.

If the fuel tank center-line and the spray-bar are at the same level and the tank is full; fuel level will be, say, ~1" above the...
Forum: Glow Engines
11-24-2006, 02:12 PM
Replies: 89
Views: 6,122
Posted By DarZeelon

RE: Why Are Nearly All Kits and ARFs Incorrectly Designed?

Yes, they are, Dave!

You wrote yourself that there are disadvantages to upright, or inverted engine mounting.
And that the 'so called' universal engine mount places the tank center-line at...
Forum: Glow Engines
11-24-2006, 01:20 AM
Replies: 89
Views: 6,122
Posted By DarZeelon

RE: Why Are Nearly All Kits and ARFs Incorrectly Designed?

Hugh,


While there are other variables, one of which your sketch shows, like the muffler pressure tube being under the fuel when inverted, as well as some (a bit of the) fuel dripping away...
Forum: Glow Engines
11-10-2006, 12:07 PM
Replies: 89
Views: 6,122
Posted By DarZeelon

RE: Why Are Nearly All Kits and ARFs Incorrectly Designed?

Brian,


It is a fact that if you place the tank center-line exactly at spray-bar level, you will not notice any difference in engine RPM, if you hold the plane level, between upright and...
Forum: Glow Engines
11-10-2006, 05:43 AM
Replies: 89
Views: 6,122
Posted By DarZeelon

RE: Why Are Nearly All Kits and ARFs Incorrectly Designed?

Brian,


I would rather address people, not by their screen name, but by their given name.

I would not ask 'who's Brian' and I would rather not refer to you as 'downunder' if I know your...
Forum: Glow Engines
11-09-2006, 03:35 PM
Replies: 89
Views: 6,122
Posted By DarZeelon

RE: Why Are Nearly All Kits and ARFs Incorrectly Designed?

Hugh,


I know that this was not exactly what you meant, but I indirectly addressed it.

The only way the fuel will be the same distance higher, or lower than the spray-bar, going from...
Forum: Glow Engines
11-09-2006, 01:51 PM
Replies: 89
Views: 6,122
Posted By DarZeelon

RE: Why Are Nearly All Kits and ARFs Incorrectly Designed?

Hugh,


From the aspect of my university degree, I am a bachelor of economics, but my trade is engineer of software testing.

I thought about the previous post, regarding the difference...
Forum: Glow Engines
11-08-2006, 09:48 AM
Replies: 89
Views: 6,122
Posted By DarZeelon

RE: Why Are Nearly All Kits and ARFs Incorrectly Designed?

Brian,

I corrected it for methanol.



-----------------------------------------


Jim,
Forum: Glow Engines
11-07-2006, 11:00 PM
Replies: 89
Views: 6,122
Posted By DarZeelon

RE: Why Are Nearly All Kits and ARFs Incorrectly Designed?

Hugh,


The head of the fuel is determined by its level and if you have 3" of fuel level above the vent, with the specific density of model fuel being 0.7918, you will have 0.009 Bars (0.088...
Forum: Glow Engines
11-07-2006, 12:27 PM
Replies: 89
Views: 6,122
Posted By DarZeelon

RE: Why Are Nearly All Kits and ARFs Incorrectly Designed?

Not true, Hugh.

The choice of the fuel-tank center-line as the carburettor venturi level, is used because it is supposed you would fly until your fuel tank is nearly empty and also to make the...
Forum: Glow Engines
11-07-2006, 03:52 AM
Replies: 89
Views: 6,122
Posted By DarZeelon

RE: Why Are Nearly All Kits and ARFs Incorrectly Designed?

Fadi,

You are missing something...
The fuel jet, center of the carburettor barrel must be at the same level as the fuel-tank center-line; not the fuel-tank's top!

You should have the...
Forum: Glow Engines
11-06-2006, 02:58 PM
Replies: 89
Views: 6,122
Posted By DarZeelon

RE: Why Are Nearly All Kits and ARFs Incorrectly Designed?

Mike,


I do not remember seeing that thread, but it addresses the specific issue of inverted four-stroke engines.
This thread addresses most ARFs and kits and their designed installation,...
Forum: Glow Engines
11-06-2006, 04:04 AM
Replies: 89
Views: 6,122
Posted By DarZeelon

Why Are Nearly All Kits and ARFs Incorrectly Designed?

Most glow engine models; at least 98%, I believe, do not use a fuel pump.

But all the kits/ARFs I have ever seen mount the engine at the wrong height in relationship to the fuel-tank.

I.e....
Showing results 1 to 17 of 17


 
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