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Cox Engine of The Month
February-2024
1/2A Nut's

"RC Speed Boat Power Drive TD .020"

More info on this engine!




PAST WINNERS
CEF Traveling Engine

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Post  uncle al Mon Apr 11, 2022 8:55 am

What's the max voltage battery for .049 glow plugs ?
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Post  GallopingGhostler Mon Apr 11, 2022 9:42 am

With the genuine Cox glow heads, I've always used 1.5 Volts. Official instructions with my R/C Bee:

glow plugs 2022-011

States 1.5 Volts. Latest Sure Start instructions of late 1990's state the same. Any higher, there is a possibility of burning out the element or shortening its life.
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Post  sosam117 Mon Apr 11, 2022 10:03 am

Yup,
Years ago, we only used a 1 cell, "D" size, alkaline (dry cell) which was 1.5 volts.
Usually went to Radio Shack and purchased a "D" size battery holder (plastic) for a few bucks and soldered on the Cox glow clip.

That "1" cell would last almost the entire year of starting my Cox engines.

THE GOOD OLD DAYS!   Very Happy Very Happy Very Happy
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Post  Lukemiester Mon Apr 11, 2022 10:49 am

i use 1.5 volts on my 049 plugs. i'm sure you could go to 1.7 volts somewhat safely, but 049s have always started fine with 1.5 for me
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Post  cstatman Mon Apr 11, 2022 12:56 pm

i have been fighting glowplugs for a few years..

then I thought "what is the ONE COMMON thing in every Cox motor you are fighting to start"

My battery box, from 1984

this arrived this weekend:
http://www.exmodelengines.com/product.php?productid=17769&cat=259&page=1

(thanks Matt!)

after getting used to the clip? my pile of "probably dead" glow plugs? 90% functional. had 4+ motors on and off my test stand, super easy starts..

I cannot recommend this box enough
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Post  GallopingGhostler Mon Apr 11, 2022 1:58 pm

In high school, I accidentally connected a 6 Volt lantern battery to a Cox glow head, an expensive mistake. Embarassed (Both 1.5 V and 6 V batteries had the same form factor - looked the same except for labeling.)
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Post  Kim Mon Apr 11, 2022 2:01 pm

GallopingGhostler wrote:In high school, I accidentally connected a 6 Volt lantern battery to a Cox glow head, an expensive mistake. Embarassed  (Both 1.5 V and 6 V batteries had the same form factor - looked the same except for labeling.)

Ahhh...the ole "Flashplug"...I know your pain, Brother!!!!
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Post  Lukemiester Mon Apr 11, 2022 2:02 pm

i do as well
accidentally connected 12 volts to one lol
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Post  GallopingGhostler Mon Apr 11, 2022 2:20 pm

Kim wrote:
GallopingGhostler wrote:In high school, I accidentally connected a 6 Volt lantern battery to a Cox glow head, an expensive mistake. Embarassed  (Both 1.5 V and 6 V batteries had the same form factor - looked the same except for labeling.)
Ahhh...the ole "Flashplug"...I know your pain, Brother!!!!
Very familiar, hmm, M3B flash bulbs, had one of these to use with my 120 twin lens box camera. Laughing
glow plugs 2022-025

Remember the blue flash bulb image temporarily burned into the back of your eye balls for the next 10 minutes? Affraid or WOW!
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Post  coxaddict Mon Apr 11, 2022 3:45 pm

Yup, blew 2 plugs at the same time trying to start a twin .049.  I inadvertently plugged my dual glow plug clips into the 12volt terminal. Now I need to figure out a way to idiot proof my mini power panel
glow plugs P4100310
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Post  GallopingGhostler Mon Apr 11, 2022 4:09 pm

coxaddict, I'd make a special short patch cord that plugged into those banana connectors, with another styled connector on it. Use 2 drilled holes about half inch apart in the aluminum panel to run a 1/8" zip tie to hold patch cord permanently in place. Then use use same styled connector on the patch cord other end for your glow head leads. Perhaps the auto style 2 pin trailer plug could be something unique enough not to be confused with all your other field connections.

Next photo shows the couple buck 2 pin trailer connector I used for a vehicle charger, available at any auto parts store. (By a 12 inch extension, cut wiring in 2, now you have both connectors. Wink )

glow plugs Schuma10
Shumaker Charger using 2 pin trailer connectors
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Post  944_Jim Mon Apr 11, 2022 8:03 pm

Coxaddict,
I have that same panel...and popped a pile of plugs also. Since the glowplug is polarity-agnostic, I will color-code mine so the plug holes are some aweful color like puce or purple (or some other "P" color) for "P"lugs, and leave the 12V red/black in their natural colors.

PS I can't find those panels, and am looking for a spare. Do you know where you got yours? Was it recently? TIA
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Post  getback Tue Apr 12, 2022 7:17 am

glow plugs Ptdc0279glow plugs Ptdc0280glow plugs Glow_p11 The Cermark PP is my currant it has a plug for both wires for the glow , It does all kinds of good stuff too as ck. your input batt. and your receiver battery to . I had to but a connector for it so both wires go into one plug , haven't used it much but for 10- it was a deal at a show I was at . Very Happy The Hobbico 2nd one died !
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Post  coxaddict Tue Apr 12, 2022 12:45 pm

Thanks for the great ideas. I actually have those polarized trailer plugs. I'll use it on the starter side.
944_jim, I bought my PP on ebay from a seller who had a few of them. I should have bought more.
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