why are OS Type F glow plugs so expensive?  
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All Forums >> Glow Engines, Gas Engines, Fuel & Mfg Support Forums >> Glow Engines >> why are OS Type F glow plugs so expensive?
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why are OS Type F glow plugs so expensive? - 10/2/2002 7:27:33 PM   
Ron McGrath AKA DEVINS DAD


 

Posts: 186
Joined: 6/9/2002
From: Rochester, NY, USA
Status: offline 		were do you come up with the 16% or more number ????


this is out of a full power dive also

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RON McGRATH

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why are OS Type F glow plugs so expensive? - 10/2/2002 8:13:34 PM   
Sport_Pilot



Posts: 7652
Joined: 1/21/2002
From: Acworth, GA, USA
Status: offline 		[QUOTE]Originally posted by myvwtruck
were do you come up with the 16% or more number ????


this is out of a full power dive also [/QUOTE]

The prop slip is probably not less than 16%. A better equasion for figuring engine speed per plane speed is:

MPH = (Pitch * RPM)/(1056*(1+%slip)) or

RPM= (MPH*(1+%slip)*1056)/Pitch

The slip is a function of drag and prop efficiency. That is to say that to propell the pland at a certain speed the prop must push air at a faster speed.

(in reply to Dazzler)
       Post #: 77

why are OS Type F glow plugs so expensive? - 10/3/2002 2:43:37 AM   
Ron McGrath AKA DEVINS DAD


 

Posts: 186
Joined: 6/9/2002
From: Rochester, NY, USA
Status: offline 		then since it is in a full throttle dive could it not be less than 16% because it is in a free fall

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RON McGRATH

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why are OS Type F glow plugs so expensive? - 10/3/2002 8:54:08 AM   
Sport_Pilot



Posts: 7652
Joined: 1/21/2002
From: Acworth, GA, USA
Status: offline 		The 16% slip is a guess. Based on the high pitch prop and high drag from high speed. It could be less.

(in reply to Dazzler)
       Post #: 79

You can pay less AND get BETTER ! - 10/4/2002 1:15:47 AM   
Ladyflyer



Posts: 1035
Joined: 1/13/2002
From: North Am, PA, USA
Status: offline 		Well , now that we have a few folks spout their willingness to spend almost any price to get the beloved,if not grossly overrated "F" plug it could be only a matter of time before the foces of the EMPIRE report back to Darth Nippon ! Wouldn't bother me if they charge whatever the great brainwashed masses are willing to pay. I think they should charge at least $200 from the "GLOWING " reports they get.

No ,it is NOT "the American way" as has been suggested . It is just HYPE and nothing more. On some engines with certain fuels on any given day it MAY be the best plug. Other conditions may indeed show a different plug to be the answer. Might as well ask which is the best wrench ? A 10mm Snap On may be best for the valve cover screw on an Alfa Romeo but it won't do much good on GMC 6-76 blower end covers .

The fact is there are plugs that cost less that will run many of the engines now running the OS "F" better and last longer. The ONLY reason the OS"F" is in many (I said MANY) of those engines is because the owner was told the "F" was THE plug to run when he got his first 4 stroke, a tip often passed on by someone who received it the same way. A few folks try different plugs and follow up with proper retuning and discover BETTER plugs that do indeed last longer ,run better and cost less.

As for the soon to be $200 Os "F" more power to em . I will do without them very nicely -thanks anyhow

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LF
When they have to say "NO FEAR" it really means NO SENSE.

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why are OS Type F glow plugs so expensive? - 10/4/2002 6:12:31 AM   
Ron McGrath AKA DEVINS DAD


 

Posts: 186
Joined: 6/9/2002
From: Rochester, NY, USA
Status: offline 		now that we have heard some emotion lets get back to fact back in the late 80's back in the early years of four cycle engines I broke away from the 2 cycle crowd and sold all of the 2 cycle engines and only ran 4cycle engines. No one else that I knew was running only 4 cycle engines and not many people were running them at all since then I have only owned one 2 cycle a 50 fsr os that I then replaced shortly after I bought it with a old 61 os 4cycle.
since I started I think I have tried many different plugs (not all though) and still look forward to trying something new. When people ask me to help them with a 4 cycle that they are having a problem with there are two very important things I tell them to do a fuel filter in the plane right before the tank and a os f plug
and then we can iron out any other problem there might be

so I think that I am the one that started recommending the f plug in my circle of friends and I found that out on my own by trial and error

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RON McGRATH

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       Post #: 81

why are OS Type F glow plugs so expensive? - 10/5/2002 12:54:59 AM   
Ladyflyer



Posts: 1035
Joined: 1/13/2002
From: North Am, PA, USA
Status: offline 		I always wondered who the ONE was. Now I know another one who says he is the one. I want to thank the other one s who put me on to the #3 Enya .

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LF
When they have to say "NO FEAR" it really means NO SENSE.

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       Post #: 82

why are OS Type F glow plugs so expensive? - 10/5/2002 1:05:32 AM   
Ed Cregger



Posts: 7645
Joined: 1/31/2002
From: Ringgold, GA, USA
Status: offline 		Onboard fuel filters are just another point-of-failure as far as I am concerned. I double filter my fuel before it gets into the model and then am very careful to keep it clean while fueling.

I like the OS Type-F and the Enya #3.

Some years ago, Tower Hobbies sold their own brand of four-stroke plug. I had good results with that plug too. I must admit, though, that the OS Type-F is my favorite for four-strokes.

None of my recommendations are based upon scientific analysis, so your opinion is every bit as good as mine.


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Artisan

"Flying models since the Fifties - I'll get the hang of this yet!!!"

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       Post #: 83

why are OS Type F glow plugs so expensive? - 10/5/2002 4:02:42 AM   
Ron McGrath AKA DEVINS DAD


 

Posts: 186
Joined: 6/9/2002
From: Rochester, NY, USA
Status: offline 		I must admit that I do not think that I have tried a enya 3 I do know that I do not prefer enya engines but I will get a enya 3 and try it as far as the fuel filter goes I would not set up a plane without one and was wondering how you think that it might fail ???? let me know

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RON McGRATH

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why are OS Type F glow plugs so expensive? - 10/5/2002 5:04:31 AM   
Taildrager


 

Posts: 921
Joined: 12/5/2001
From: Oregon, IL, USA
Status: offline 		Now that LadyFlyer has given the Empire the thorough tongue lashing it may or may not deserve, If she would be so kind as to give us a fool prof way to test and read a glow plug to decide for our selves which heat range, and brand of plug is best for our engines. Lets start with 4 strokes, as we all know they sound sweet in the air.

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       Post #: 85

Fuel filters - 10/5/2002 7:03:45 AM   
Ed Cregger



Posts: 7645
Joined: 1/31/2002
From: Ringgold, GA, USA
Status: offline 		As I said in my last post, it is just my opinion and not something that I believe is absolutely, without a doubt, THE TRUTH.

I used to run fuel filters long ago. Granted, they were not the same type as manufactured today, so my experience is old in this regard.

The one time that I really relied on one to save my bacon, at a pattern contest, it let me down and passed a sliver of plastic that came from a Kraft-Hayes fuel tank. My engine would not run at over half throttle without dying. Ever try to fly pattern at half throttle? I did. I got lucky. I won the event, but it really frustrated me that I couldn't find out what was wrong with my engine until I got home and was talking to a friend on the telephone. My friend was familiar with the symptoms and proffered the cure. Did the filter cause the incident? No, but it didn't work. Why carry it around if it doesn't work?

Other occasions have demonstrated fuel filter bodies that unscrewed and caused an air leak. Or the hastily squirreled away filter that had kinked the fuel lines that restricted fuel flow - that kind of thing. I now leave the filters on the ground without a problem.


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Artisan

"Flying models since the Fifties - I'll get the hang of this yet!!!"

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why are OS Type F glow plugs so expensive? - 10/5/2002 7:32:31 AM   
Ron McGrath AKA DEVINS DAD


 

Posts: 186
Joined: 6/9/2002
From: Rochester, NY, USA
Status: offline 		I think that I have been lucky that I have not had the same problems that you have had. I always try to keep the fuel line from the tank to the carborator as short as possible, so sometimes I put the fule filter inside the fule tank in the clunk line. I also try to put the tank stopper Through a hole in the fire wall so that it is as close to the fire wall as possible. I also feel that it is very important to make sure that the center line of the carborator and the center line of the fuel tank are as close as possible. I like to use the large aluminum two piece fuel filters and always check them to make sure there is no debris in them before using them. The best part about the two piece fuel filters is when you crash an airplane you can take them apart and see how much crud you have in them Thank God I don't get to check them too often!!!!!

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RON McGRATH

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why are OS Type F glow plugs so expensive? - 10/5/2002 8:22:23 AM   
Ed Cregger



Posts: 7645
Joined: 1/31/2002
From: Ringgold, GA, USA
Status: offline 		Did I mention that I do use sintered bronze fuel pickups when I can find them? They act as a fuel filter.


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Artisan

"Flying models since the Fifties - I'll get the hang of this yet!!!"

(in reply to Dazzler)
       Post #: 88

why are OS Type F glow plugs so expensive? - 10/5/2002 7:48:40 PM   
Ron McGrath AKA DEVINS DAD


 

Posts: 186
Joined: 6/9/2002
From: Rochester, NY, USA
Status: offline 		is that what you use in the tank?????

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RON McGRATH

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       Post #: 89