.o49 engines by cox  
View related threads: (in this forum | in all forums)

Tower Hobbies
Enter up to 4 keywords or Tower stock numbers
Logged in as Guest



Users viewing this topic: none
  Printable Version
       



All Forums >> RC Airplanes >> "1/2 A" & "1/8 A" airplanes >> .o49 engines by cox Page: [1] 2 3   next >   >>  

Login
Message << Older Topic   Newer Topic >>
.o49 engines by cox - 3/12/2008 12:38:49 AM   
bboykin


 

Posts: 179
Joined: 3/18/2004
From: hermitage, AR, USA
Status: offline 		is the price of .049 right from cox 6.99 hope so have not seen this only on controlines since the 60's is this price right or what do you have to imput
       Post #: 1

RE: .o49 engines by cox - 3/12/2008 12:42:22 AM   
air-madness


 

Posts: 140
Joined: 2/27/2007
From: , IN, USA
Status: offline 		Yep, the price is correct. I purchased two of them a couple of months ago. I installed an AP carb on one of them.

_____________________________

What goes up must come down (sometimes hard), so build a SPAD and save some cash, man.

(in reply to bboykin)
       Post #: 2

RE: .o49 engines by cox - 3/12/2008 1:04:41 AM   
longdan



Posts: 481
Joined: 10/18/2006
From: Auckland, NEW ZEALAND
Status: offline 		Price is right, but they are out of stock. No one is too sure when they will be available again.

(in reply to air-madness)
       Post #: 3

RE: .o49 engines by cox - 3/12/2008 1:42:06 AM   
lildiesel


 

Posts: 459
Joined: 11/18/2005
From: Cincinnati, OH, USA
Status: offline 		Pictures! I want a Show 'n Tell about this...

quote:

ORIGINAL: air-madness
Yep, the price is correct. I purchased two of them a couple of months ago. I installed an AP carb on one of them.


(in reply to air-madness)
       Post #: 4

RE: .o49 engines by cox - 3/12/2008 2:01:46 AM   
bboykin


 

Posts: 179
Joined: 3/18/2004
From: hermitage, AR, USA
Status: offline 		thanks for replys would like to know more about this engine what fuel is required and what size planes it will propell. thanks for all infornation received so for

(in reply to lildiesel)
       Post #: 5

RE: .o49 engines by cox - 3/12/2008 2:16:59 AM   
ProBroJoe



Posts: 453
Joined: 9/24/2004
From: Annapolis, MD, USA
Status: offline 		Two VERY successful planes for the $7 Sure Start are ptulmer's Das Not Ugly (DNU) and rainedave's Sure Shark. A forum search here will turn up several builds, as well as a few videos. Oh, how could I forget? The Postal Plane Project stickied at the top of the forum page is using a Sure Start as well! But of course there are many, many more planes that will fly just fine with an .049 reed valve engine, from gliders to trainers, to warbirds and pylon racers... depends on wing area and all up weight of course. For what it's worth, I recently converted a Parkzone J3 Cub to a Cox .049 and at 15 oz, it flew like a scaled cat.

All Cox engines love fuel with medium to high nitro content (15-35%) and a fairly high oil content (20-25%) of which should be mostly castor oil.

Hope some of this helps,

-Joe




(in reply to bboykin)
       Post #: 6

RE: .o49 engines by cox - 3/12/2008 3:19:10 AM   
Andrew


 

Posts: 1903
Joined: 2/4/2003
From: Murray, KY,
Status: offline 		I spoke with the folks at COX models today, 3/11 -- they expected a delivery of additional engines by mid-March.

_____________________________

the "other" andrew
I'm not older than dirt, but I can remember when it was patent pending

(in reply to ProBroJoe)
       Post #: 7

RE: .o49 engines by cox - 3/12/2008 3:20:35 AM   
propjobbill


 

Posts: 310
Joined: 1/26/2004
From: Oberlin, OH, USA
Status: offline 		I have purchased more than 40 of them at that price. Just ordered 10 of them this week. They were selling for about $29.00 a little more than a year ago. Cox has stopped making fuel (gas) engines. So these are closeout deals, I called about 2=3 months ago they said they still hade 30,000 left but with everyone selling them on e-bay for $10.00 or more plus some hobby shops also selling them some day they will be all gone.

They are a great sport engine for RC or C/L from the factory they spin a 6x3 prop about 12,000 to 13,000 rpm on average. That means you have about 9 = 11 oz of static thrust. With slight modification you can easy get over 15,000 rpm which is about 14 oz of thrust. anything from 10=20 oz should fly ok with them from 100=250 sqin of wing area. I fly high wing plane at 12 =14 oz and the make good fliers.

These are good little sport engines, and well worth the $7.00 but almost everyone that I have bought needed the piston reset. You can find out about that by doing a search on cox piston reset. They will usually work without a reset, but you add years to their life by doing so, and if you modify them to get more than 18,000 rpm they won't last a long time without a reset of the piston

< Message edited by propjobbill -- 3/12/2008 3:36:37 AM >

_____________________________

propjobbill (I just love to fly)

(in reply to ProBroJoe)
       Post #: 8

RE: .o49 engines by cox - 3/12/2008 4:08:11 AM   
somegeek



Posts: 2084
Joined: 8/1/2005
From: Vancouver, WA, USA
Status: offline
quote:

ORIGINAL: lildiesel

Pictures! I want a Show 'n Tell about this...

quote:

ORIGINAL: air-madness
Yep, the price is correct. I purchased two of them a couple of months ago. I installed an AP carb on one of them.




I'd like to see this as well!

somegeek

_____________________________

Fly safe, have fun. Measure three times, cut once. The man who makes no mistakes does not usually make anything.

(in reply to lildiesel)
       Post #: 9

RE: .o49 engines by cox - 3/13/2008 4:31:31 AM   
OzMo



Posts: 1388
Joined: 9/2/2002
From: OZark, MO, USA
Status: offline 		At 6.95 each this is the cheapest way to get a standard cox glow plug and it comes with a free engine!! I bought four and also stashed some 09 stuf and I couldn't pass on a NIB texaco and NIB black widow each for under $50.00 at a little hobby shop.
Replacement heads that use standard glow plugs are nice idea as well cause the plugs for these little motors are getting rarererererer
Hmm may have mispelled something back therererere

_____________________________

Yes dear, I did glue my hand to the airplane to keep from dropping it.

(in reply to somegeek)
       Post #: 10

RE: .o49 engines by cox - 3/13/2008 6:08:20 AM   
KidEpoxy



Posts: 3263
Joined: 10/14/2004
From: San Antonio, TX, USA
Status: offline
quote:

ORIGINAL: air-madness
Yep, the price is correct. I purchased two of them a couple of months ago. I installed an AP carb on one of them.


I'll get in line to see that too.

_____________________________

Optional MA is part of AMA history, we can go optional AGAIN if we just say so

(in reply to OzMo)
       Post #: 11

RE: .o49 engines by cox - 3/13/2008 8:56:21 AM   
longdan



Posts: 481
Joined: 10/18/2006
From: Auckland, NEW ZEALAND
Status: offline 		Count me in too! Let's see this thing!

(in reply to KidEpoxy)
       Post #: 12

RE: .o49 engines by cox - 3/13/2008 11:36:20 AM   
flyinrog



Posts: 5687
Joined: 9/3/2002
From: Burlington, NC, USA
Status: offline
quote:

ORIGINAL: air-madness

Yep, the price is correct. I purchased two of them a couple of months ago. I installed an AP carb on one of them.


Thats what Tim W. was doing..puting a carb/venturi on the back,making space bee's or hoppers which ever term it was...maybe rr clones,,anyway its been done..he did make a different back plate for it though....Rog

_____________________________

Ever walk into a room and forget what you went in for?...ADHD, welcome to my world,it happens everyday!

(in reply to air-madness)
       Post #: 13

RE: .o49 engines by cox - 3/15/2008 2:18:35 AM   
Honker1


 

Posts: 10
Joined: 11/10/2007
From: Lebanon, OH, USA
Status: offline
Propjobbill,

I love these little engines and have bunches of them. Been flying them for years. If you don't mind sharing your secrets, I am dying to know how to get a surestart to rev up to those rpms with a 6x3. I have polished the cranks, smoothed out the inside of the case, enlarged the venturi, used the galbrath head and still don't get near 15K rpm. It is driving me crazy. I placed an order for a Hyper Color engine ( to get a decent reed engine) some months ago but I understand that Tim Wiltse is going through a rough patch, I wish him the best.

Please, I know that many of us would love to here how to get surestart engine up to 18K! If you would be so kind as to share your knowledge.

Thanks in advance,

Pat (also in Ohio)


(in reply to propjobbill)
       Post #: 14

RE: .o49 engines by cox - 3/15/2008 4:09:29 AM   
propjobbill


 

Posts: 310
Joined: 1/26/2004
From: Oberlin, OH, USA
Status: offline 		First of all I can't get 18K with a 6x3 prop. I have been using a 6x2 APC prop for those rpm. I'm not sure how much I can get from a 6x3, but I am thinking maybe 15,000. In a few more weeks I will be able to get back to testing if weather permits. The biggest thing that I do is remove the back plate, remove the spray bar, and reed assembly. I chuck up a 3/16 drill bit into the drill press, and drill very slowly from the reed side to the opening where the spray bar goes through. It is very thin and narrows where the spray bar goes through. If you go to fast it will crack the opening. Apply pressure from the needle side of the spray bar when removing the spray bar. If you try from the other direction it will also crack the tube, (I learned this the hard way). I use pliers and caution, I tried pressing the spray bar out. If you apply pressure to the bar without support for the tube it can snap off. After I clean up all the openings from small plastic shavings the drill leaves I reinstall the spray bar. I then carefully open the chock tub in both directions to 3/16”.

I use about 30% fuel for high rpm, I also reset the piston. That’s the first thing I do. Drilling out these openings give me between 2,000