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Cox Engine of The Month
February-2019
balogh's

"Black Lynx .049 with a Throttle, Exhaust Deflector and Nelson-Galbreath head set"



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WV Redneck F-15/engine clean-up

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WV Redneck F-15/engine clean-up

Post  rsv1cox on Tue 18 Sep 2018 - 15:43

I have done this before with great results.

Engine - Simple Green immersion with lot's of prop turning, water rinse, RemOil spray finish in every opening, compressed air blow out, lot's of prop action.

Body, SG spray, light paper towel, hose off, dry, compressed air down both vents cleans fuel tank of water/fuel residue.











This Cox model may have it's advocates but IMHO it's the worst flyer that I have ever attempted to get in the air, balsa or plastic.  As mentioned before, this is my only screened port Cox engine (191-5) and find it unique.  I could not get the screen off, but admittedly I didn't try too hard.
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Re: WV Redneck F-15/engine clean-up

Post  GallopingGhostler on Tue 18 Sep 2018 - 17:00

rsv1cox wrote:
This Cox model may have it's advocates but IMHO it's the worst flyer that I have ever attempted to get in the air, balsa or plastic.  As mentioned before, this is my only screened port Cox engine (191-5) and find it unique.  I could not get the screen off, but admittedly I didn't try too hard.
Good clean up, you don't see these too often now. I remember seeing them a while back, clarified by Wiki, 1977 Product #3310 with 192-3 engine, did not make a remarkable impression on me lacking clear windows and using inexpensive glossy paper stick on graphics for decoration instead of decals or paint, seemed more toy like than an airplane.

CEF cylinder identification doesn't mention the screen. Based on the time made, I'm guessing the screened cylinder was an interim attempt before the twin slit cylinders.

Perhaps its poor performance was weak power, could use a shot in the arm with a hotter cylinder and glow head? May be even a Sure Start dual bypass boost ported cylinder would improve performance?

I know my comment are rhetorical, thanks for sharing Bob, glad to see someone is actually flying them.
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Re: WV Redneck F-15/engine clean-up

Post  rsv1cox on Tue 18 Sep 2018 - 17:12

Thanks GG.  Maybe trying to fly them would be a better description.  Smile

I got the 191-5 designation from this site under "Product engines".

http://www.mh-aerotools.de/airfoils/cox_frameset.htm

I don't quite understand the reason for the screen.  My muddled mind thinks it's there to keep debris out of the cylinder but there must be a deeper reason.

I remember years past when I would land them in the weeds, seeds would find their way in there.  Anyway, when I finally do one of Kim's "lawn dart" landings with it and break the fuselage, I'm going to retire and mount that engine.  

Bob
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Re: WV Redneck F-15/engine clean-up

Post  Jason_WI on Tue 18 Sep 2018 - 17:40

The mesh screen and the slotted screen were an attempt by Cox to prevent flames, fires, and burnt fingers from a running engine. The slit cylinder eventually replaced those attempts. Each version was only produced for a year. Not a rare cylinder but harder to find. This was also done on .020 cylinders and most commonly found on the helicopter engines with the yellow backplate.
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Re: WV Redneck F-15/engine clean-up

Post  NEW222 on Tue 18 Sep 2018 - 17:59

Nice clean-up. I guess I will have to see if the Simple Green is available here and give it a try. If I am lucky and find it, when you say immersion, are you reffering to a full immersion in pure SG straight from the bottle? Thank you.
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Re: WV Redneck F-15/engine clean-up

Post  GallopingGhostler on Tue 18 Sep 2018 - 18:16

Thanks, Jason_WI for the clarification on the screened cylinders. Looking how the plastic F-15 cockpit area partially covers the cylinder, I'm thinking that for another cylinder to work would require CI - Cox .049 Exhaust Deflector Shield



I'm a little surprised that Cox did not mount the engine cylinder sideways, which would have allowed for a fuller cockpit presentation (water under the bridge). What?
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Re: WV Redneck F-15/engine clean-up

Post  rsv1cox on Tue 18 Sep 2018 - 18:25

NEW222 wrote:Nice clean-up. I guess I will have to see if the Simple Green is available here and give it a try. If I am lucky and find it, when you say immersion, are you reffering to a full immersion in pure SG straight from the bottle? Thank you.

Simple Green comes two ways, standard household and concentrate. I used the concentrate here and cut it by about 1/3rd. Don't heat it as it will blacken the case especially if left in the fluid too long.

Yes, full immersion while operating the propeller. You will get hydraulic lock if the head is attached, simple just back off and expel the concentrate then prop again. This action cleans the reed without removing it and eliminates the possibility of damage. I usually remove the glow head avoiding lock, but no way on this screened engine to get the second Cox wrench in the exhaust ports.

The key is compressed air blowout and drying followed by RemOil which over time evaporates and is reputed to leave a "Teflon" film. I have used it for years on my engines and never found fault with it. Early on, I used WD-40 and learned a painful lesson. Sad

Bob
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Re: WV Redneck F-15/engine clean-up

Post  944_Jim on Tue 18 Sep 2018 - 18:36

Bearing in mind these "Wings" models were marketed as beginner planes...roundie, roundie only! Upright pistons are harder to flood on prime. Sideways cylinders will flood looking at them sideways (sorry, couldn't help myself). I loved the looks, but hated the flight capabilities. I remember it slowly ran up to take off speed, barely able to climb, and dropped like a hot rock at landing time. It could flare to a stop, and almost land on it's tail. Well, maybe not that bad.

I had the white Cessna too. It looked almost comical with the cylinder sticking up. Kind of reminded.me of those plastic MPC models, the Zingers, with their cartoonishly exaggerated details (engines twice normal for the body, huge wheels in back, little tiny ones up front). That Cessna out-flew the F-15 looking slab of heavy plastic. But, man, the.two jets in the series just looked awesome!
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Re: WV Redneck F-15/engine clean-up

Post  NEW222 on Tue 18 Sep 2018 - 18:43

rsv1cox wrote:Simple Green comes two ways, standard household and concentrate. I used the concentrate here and cut it by about 1/3rd. Don't heat it as it will blacken the case especially if left in the fluid too long.  

The key is compressed air blowout and drying followed by RemOil which over time evaporates and is reputed to leave a "Teflon" film.  I have used it for years on my engines and never found fault with it.  Early on, I used WD-40 and learned a painful lesson.  Sad

Bob  

Great, thank you. I think I may have found the concentrate here as it says I can dilute it to make 7.5 gallons. The bottle I believe was 32oz. Cheap enough too at only $6.50.
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Re: WV Redneck F-15/engine clean-up

Post  GallopingGhostler on Wed 19 Sep 2018 - 0:01

944_Jim wrote:Bearing in mind these "Wings" models were marketed as beginner planes...roundie, roundie only! Upright pistons are harder to flood on prime. Sideways cylinders will flood looking at them sideways (sorry, couldn't help myself). I loved the looks, but hated the flight capabilities. I remember it slowly ran up to take off speed, barely able to climb, and dropped like a hot rock at landing time. It could flare to a stop, and almost land on it's tail. Well, maybe not that bad.

I had the white Cessna too. It looked almost comical with the cylinder sticking up. Kind of reminded.me of those plastic MPC models, the Zingers, with their cartoonishly exaggerated details (engines twice normal for the body, huge wheels in back, little tiny ones up front). That Cessna out-flew the F-15 looking slab of heavy plastic. But, man, the.two jets in the series just looked awesome!

That's why I brought up going to a more powerful reedy. But, given the limited wingspan and heavy plastic, then you have a faster lead sled. However, a little more power might at least make it more manageable.

Hip Pocket Aeronautics (membership required - free) has a 20.75" wingspan HPA Half-A F-15 CL Plan that would make a better flier if kept light.
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Re: WV Redneck F-15/engine clean-up

Post  rsv1cox on Wed 19 Sep 2018 - 7:08

That Cessna out-flew the F-15 looking slab of heavy plastic. But, man, the.two jets in the series just looked awesome!

True words!!!!

Checking the F-15 this morning after it had fully dried I was gratified to see that it cleaned up so well. Just a spritz or two of Simple Green got in all the hard to get at places followed by a hose out with water sure made cleaning it easy. It was a dirty greasy mess.







I'm going to try the SG treatment on the Corsairs balky engine today to see if it frees up the reed without disassembly, then try to get it started. Might substitute a clean hot water rinse instead of cold.
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Re: WV Redneck F-15/engine clean-up

Post  getback on Wed 19 Sep 2018 - 7:51

Looks Good , do you clean the plastic with the SG and will it remove rubber bands that have melted? Asking cause I get some with rubbers melted on them , had not try to remove them but was thinking rubbing Alcohol.
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Re: WV Redneck F-15/engine clean-up

Post  rsv1cox on Wed 19 Sep 2018 - 10:15

getback wrote:Looks Good , do you clean the plastic with the SG and will it remove rubber bands that have melted? Asking cause I get some with rubbers melted on them , had not try to remove them but was thinking rubbing Alcohol.

I have been meaning to ask if anyone knew of a solvent that would remove old rubber band residue. Got a couple like yours Eric to clean-up. But no, Simple Green won't touch it.

Bob
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Re: WV Redneck F-15/engine clean-up

Post  getback on Wed 19 Sep 2018 - 10:38

Well we may just need to put that out there and see what others are using as not to clean the color away , I haven't heard no one say in my reading so far .
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Re: WV Redneck F-15/engine clean-up

Post  GallopingGhostler on Wed 19 Sep 2018 - 10:57

getback wrote:Well we may just need to put that out there and see what others are using as not to clean the color away , I haven't heard no one say in my reading so far .

I'm using Castrol Super Clean Tough Task Cleaner/Degreaser. Got a gallon of it and a spray bottle, at least 10 years old, but still works. It will clean where others won't, but you won't want to use it on painted surfaces. If you do, clean off immediately. It can mar the paint if you're not careful. It is amazing stuff.

I think they still sell it, but may have altered the name.
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