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"COX Budapest" .049 engine



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Post  Sig Skyray Sat Apr 04, 2015 9:18 am

Hello All. Getting back into CL flying now with son and having trouble getting glow plugs going. All I had around for a battery was a 6V lantern battery and std. Cox .049 type battery clip. All four old glow plugs burnt nicely and got some test runs in on the bench. Old engines started right up after 40 years of sitting in the garage!!

Go out to fly my old Stuka yesterday and no glow. So I'm going to pick up the proper 1.5V Hobbico battery at my local shop this morning and try again.

Questions:

I guess I could have burned out the glow plugs with the 6V?
Does the positive/negative connection matter?
Is the std. Cox clip any good or are the wires too small?
Should one D-cell battery be able to glow a plug by just holding the clip wires to the ends of the battery?

Thanks! Greg
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Post  rogermharris Sat Apr 04, 2015 9:39 am

Sig Skyray wrote:Hello All.  Getting back into CL flying now with son and having trouble getting glow plugs going.  All I had around for a battery was a 6V lantern battery and std. Cox .049 type battery clip.  All four old glow plugs burnt nicely and got some test runs in on the bench.  Old engines started right up after 40 years of sitting in the garage!!

Go out to fly my old Stuka yesterday and no glow.  So I'm going to pick up the proper 1.5V Hobbico battery at my local shop this morning and try again.

Questions:

I guess I could have burned out the glow plugs with the 6V?
Does the positive/negative connection matter?
Is the std. Cox clip any good or are the wires too small?
Should one D-cell battery be able to glow a plug by just holding the clip wires to the ends of the battery?

Thanks!  Greg

yea.. you only need 1.5 volts. you may have burnt them out if you have 6 volts on the too long. i would imagine it would not take long. polarity really does not matter. you should get something from one d cell. i picked up an igniter yesterday that has two d cells in parallel
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Post  Ken Cook Sat Apr 04, 2015 10:51 am

I was buying 2 Hobbico batteries and I joined two of them together which yielded use for a season  worth of flying between two people. The batteries however were going up in price and two of them were costing me nearly $20. The lifespan of the last ones I purchased were incredibly short which had me switch to a much nicer and more accurate power panel. Not everyone wants to deal with that. I use to use the old #6 drycell. They seemed to last an incredibly long time and I would get a long life span out of them. Due to the lack of need they were discontinued. F cells which came with the Hobbico battery were the replacement. The battery manufacturers have reintroduced the vintage #6 battery again. I'm looking forward to using it again Excell is the manufacturer ENO 6.
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Post  akjgardner Sat Apr 04, 2015 4:19 pm

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Post  akjgardner Sat Apr 04, 2015 4:21 pm

I removed the old cells from this cox battery pack and soldered in 4 new d cells.Works like a champ and takes me back to the seventies.
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Post  rogermharris Sat Apr 04, 2015 5:02 pm

akjgardner wrote:I removed the old cells from this cox battery pack and soldered in 4 new d cells.Works like a champ and takes me back to the seventies.

now that is cool!

much of my flying was done with a rechargeable F cell with alligator clips.
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Post  Oldenginerod Sat Apr 04, 2015 6:37 pm

Ken Cook wrote:I was buying 2 Hobbico batteries and I joined two of them together which yielded use for a season  worth of flying between two people. The batteries however were going up in price and two of them were costing me nearly $20. The lifespan of the last ones I purchased were incredibly short which had me switch to a much nicer and more accurate power panel. Not everyone wants to deal with that. I use to use the old #6 drycell. They seemed to last an incredibly long time and I would get a long life span out of them. Due to the lack of need they were discontinued. F cells which came with the Hobbico battery were the replacement. The battery manufacturers have reintroduced the vintage #6 battery again. I'm looking forward to using it again Excell is the manufacturer ENO 6.

Problem with the modern #6 batteries is that they are no longer a single cell, but multiple cells in parallel. They don't last nearly as long as the old carbon single cell variety. I remember when I was a kid my brother got hold of a couple of Eveready #6 batteries which had been removed from our local telephone exchange. Even theough they were rejects they lasted a couple of years starting my engines.
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Post  fredvon4 Sun Apr 05, 2015 5:58 pm

There is always the option to down load the original Ray-O-vac  or Ever-Ready outer cover, print it, and make a single cell looking old skool battery but with modern chemistry inside. The inter web has many different schematics for constant volt or constant current regulators to keep a 1.5Vdc~ 2Vdc glow plug happy with any of the NiMH/LiPo/LIFE source voltages

I am not hung up on nostalgia too much and really prefer these four different approaches to lighting off glow plugs:


1. Hobbieco Deluxe Power Panel II driven by a 12Vdc 7Ahr to 9 Ahr lead acid battery...My BIG flight box
2. Cyclon 5Ahr 2Vdc primary cell with a long length of wire to drop the voltage slightly...My little flight box
3. RCATS smart Lithium glow driver (expensive but is the best ever glow driver I have seen)...For competition use
4. Gang of 2 DuraCell D Cells in parallel ....used for bench testing only
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Post  GallopingGhostler Sun Apr 05, 2015 6:16 pm

This is my current starter battery.

Glow Plug Battery Dscf0516
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Post  Sig Skyray Mon Apr 06, 2015 9:50 am

akjgardner wrote:I removed the old cells from this cox battery pack and soldered in 4 new d cells.Works like a champ and takes me back to the seventies.
Cool!
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Post  Sig Skyray Mon Apr 06, 2015 10:06 am

Thanks guys for all the ideas. Not finding the ENO 6 battery.
I need simple, effective and dependable. May look at more modern, rechargeable batteries.
Greg
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Post  balogh Mon Apr 06, 2015 2:32 pm

fredvon4 wrote:There is always the option to down load the original Ray-O-vac  or  Ever-Ready outer cover, print it, and make a single cell looking old skool battery but with modern chemistry inside. The inter web has many different schematics for constant volt or constant current regulators to keep a 1.5Vdc~ 2Vdc glow plug happy with any of the NiMH/LiPo/LIFE source voltages

I am not hung up on nostalgia too much and really prefer these four different approaches to lighting off glow plugs:


1. Hobbieco Deluxe Power Panel II driven by a 12Vdc 7Ahr to 9 Ahr lead acid battery...My BIG flight box
2. Cyclon 5Ahr 2Vdc primary cell with a long length of wire to drop the voltage slightly...My little flight box
3. RCATS smart Lithium glow driver (expensive but is the best ever glow driver I have seen)...For competition use
4. Gang of 2 DuraCell D Cells in parallel ....used for bench testing only

I have the same configuration as the No 1 above except that my battery inside my starterbox is a 2Ahr rechargeable lead acid one that conveniently sits inside the box saharing the space with a confusing mess of field gear like propellers, fuel syringes, a larger starter motor, COX wrenches and screwdrivers, after-run oil and brake-disc cleaner spray to undust my engine should an unplanned landing occur,  etc that I would rather not show here..

Glow Plug Battery Mystar10


I had had all the frustration of the world before I built this up, with the D-type batteries getting weak too soon, rechargeables not giving out more than 1,2Volts while COX heads run on 1,5Volts, and now the Hobbyco panel combines everything I need in the field, and need to recharge the battery only every second month or so...(even my old COX plugs not wanting to glow on standard 1,5V alkaline batteries anymore could be brought back to service thanks to the variable glow current output from the panel).
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Post  Surfer_kris Mon Apr 06, 2015 2:59 pm

You can also get a handheld glow driver, and a lot less to carry around. The RCATS lipo driver is perhaps the best, but you have very similar technology in the smaller Lipo driver from Dynamite RC. With a regulated output you have full power independent on the charge left in the battery (until it is all gone of course).

I have shown this comparison before when this never ending (?) battery question comes up. Below you have pictures that show the power from a NiMh driver/battery compared to the Dynamite one.

Glow Plug Battery Img_1311

Glow Plug Battery Img_1312

Glow Plug Battery Img_1313
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Post  balogh Mon Apr 06, 2015 3:03 pm

Sure Kris but I also use an electric starter and like to have all field gear in my starting box.

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Post  Sig Skyray Mon Apr 06, 2015 3:07 pm

balogh wrote:
fredvon4 wrote:

I had had all the frustration of the world before I built this up, with the D-type batteries getting weak too soon, rechargeables not giving out more than 1,2Volts while COX heads run on 1,5Volts, and now the Hobbyco panel combines everything I need in the field, and need to recharge the battery only every second month or so...(even my old COX plugs not wanting to glow on standard 1,5V alkaline batteries anymore could be brought back to service thanks to the variable glow current output from the panel).

So with the Hobbico panel can one adjust the glow current in tenths of a volt like 1.5V, 1.6V, 1.7V etc.?
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Post  balogh Mon Apr 06, 2015 3:16 pm

Sig Skyray wrote:
balogh wrote:
fredvon4 wrote:

I had had all the frustration of the world before I built this up, with the D-type batteries getting weak too soon, rechargeables not giving out more than 1,2Volts while COX heads run on 1,5Volts, and now the Hobbyco panel combines everything I need in the field, and need to recharge the battery only every second month or so...(even my old COX plugs not wanting to glow on standard 1,5V alkaline batteries anymore could be brought back to service thanks to the variable glow current output from the panel).

So with the Hobbico panel can one adjust the glow current in tenths of a volt like 1.5V, 1.6V, 1.7V etc.?

The voltage at the glow plug outlet is 12VDC but the output current is intermittent and the knob on the panel allows you to set the intermittent current to meet either a standard 1,2V glow plug or COX 1,5V glow head.
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Post  Sig Skyray Mon Apr 06, 2015 3:17 pm

For a Cox .049, are you guys using the glow plug adapters that accept the insert-type glow plugs that then take the glow drivers? Don't know what you call those types of plugs but their the one's used in the larger RC plane engines.

Don't want to complicate things too early on here just getting back into it, but if I'm considering a Hobbico Panel I might as well get it all figured out before I start buying things :-)

Greg
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Post  balogh Mon Apr 06, 2015 3:25 pm

The COX glow heads do not mach the glowplug drivers as these latter are designed to attach to standard glow heads.

But a Hobbico panel outlet can be connected to glow wires ending in alligator clips that will attach to any glow plug COX heads included. (see my photo on my panel a few posts up). I used these clips mainly on COX heads but standard plugs on my OS engines mate with it as well.
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Post  rat9000 Tue Apr 07, 2015 8:44 am

Sig Skyray wrote:For a Cox .049, are you guys using the glow plug adapters that accept the insert-type glow plugs that then take the glow drivers?  Don't know what you call those types of plugs but their the one's used in the larger RC plane engines.  

Don't want to complicate things too early on here just getting back into it, but if I'm considering a Hobbico Panel I might as well get it all figured out before I start buying things :-)

Greg
Sig Skyray,some things I've noticed-I have had 1.2 Nihm rechargables lite the plug and fire the engine (cox .049) same with durracells in parallel 2,after glow plug is stressed,like 2 or 3 super floods,the plugs lost visible glo I cleaned with brake clean or by dropping them into Hoppes also noticed voltage dropped at clip-1.433,got new batts.1.612 V at clip,got a good glo back.I recently found a used Hobbico hot shot 2 which lit the heads to a brillant orange,I checked the voltage on it,1.339,I'm not sure what gives here.rat
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Post  rat9000 Tue Apr 07, 2015 8:52 am

GallopingGhostler wrote:This is my current starter battery.

Glow Plug Battery Dscf0516
GG whats that clip your using,looks like a wire coming out with a spade to post.
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Post  GallopingGhostler Tue Apr 07, 2015 11:30 am

rat9000, I can't tell you whether it is a DuBro, Veco or what clip. I bought it 40 years ago, came with twin stranded wires and factory spades on one end and 1.5V bell battery lugs on the other. Then it was nice and shiny with galvanized finished steel. As time went on, those wires were well worn and needed replacement, so I used 16 gauge auto wire and crimp connectors. After all these years it is still my favourite clip. I can use it on engines from .020 to .65+. The battery holder is a reworked Radio Shack one where I drilled out their rivets and rewired the cells in parallel. Being light duty it cracked then broke, now held together with wire ties. I may later go to soldering 4 Alkaline D-cells together.
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Post  TDbandit Tue Apr 07, 2015 12:06 pm

I use the old Cox battery box it's worked well for me so far it uses two standard D cell alkaline batteries in parallel. The clip is a unit from sig I also have an old du-bro connector (Not pictured) for standard glow plugs. I have a power panel as well which I use mostly for my RC helicopters. and larger planes (Bandit)
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