Cox Engines Forum
You are not logged in! Please login or register! Guests are limited to posting in the "General Questions (Guest Posting Allowed)" section only. Becoming a member is fast, easy and FREE!


wanted sure start engines Babe_b10
Log in

I forgot my password

Search
 
 

Display results as :
 


Rechercher Advanced Search

Latest topics
» Jetex engines
by Cox International Today at 12:14 pm

» Merlin inserts?
by Cox International Today at 12:13 pm

» cox gtp 049 mod
by davidll1984 Today at 12:00 pm

» New Parts Lot #1
by davidll1984 Today at 11:46 am

» It's all about balance.
by Iceberg Today at 10:54 am

» Plastic tank issues
by fredvon4 Today at 9:59 am

» Here. Hold my beer.
by rsv1cox Today at 9:54 am

» Two New 1/2a Combat Planes
by NEW222 Today at 9:16 am

» OS engine ?
by Ken Cook Today at 4:06 am

» Kirn NVA Issues
by Aero Yesterday at 8:36 pm

Cox Engine of The Month
October-2020
Jason_WI's

"Pieces and parts RR-1. New crank, rotary valve, and drive plate. Early #1 cylinder. Drilled out golden bee backplate. Battle hardened crankcase and tank."



PAST WINNERS
CEF Traveling Engine

Win This Engine!
Forum Store
Gallery


wanted sure start engines Empty

wanted sure start engines

Page 1 of 2 1, 2  Next

Go down

Wanted wanted sure start engines

Post  robot797 on Thu Aug 13, 2020 5:12 pm

ola
guys for a project I need 4 sure start engines
(and the firewall mount)

who has some cheap ones lying around
robot797
robot797
Gold Member
Gold Member

Posts : 478
Join date : 2013-07-28
Age : 30

Back to top Go down

Wanted Re: wanted sure start engines

Post  robot797 on Thu Aug 13, 2020 5:22 pm

I got reminded that it might help if I were to describe the project

I want to make a demonstration board that has 4 engines that all run on a different fuels
nitro-diesel-gasoline-propane

and it would also gives me a reason to explain how I made them run on all the fuels
robot797
robot797
Gold Member
Gold Member

Posts : 478
Join date : 2013-07-28
Age : 30

Back to top Go down

Wanted Me too

Post  happydad on Thu Aug 13, 2020 5:40 pm

robot797 wrote:I got reminded that it might help if I were to describe the project

I want to make a demonstration board that has 4 engines that all run on a different fuels
nitro-diesel-gasoline-propane

and it would also gives me a reason to explain how I made them run on all the fuels

robot797:

And I am helping him find most of the parts. I have crankcases, both regular and the thicker crankshaft car version, enough. Crankshafts, enough. Backplates, not so much, I can only provide 1 maybe 2 so far, I have converted most of mine for a special project. Cylinders, I have several #2 and #3 which should be enough. Anyone want to donate a #4. Glow heads, more than enough, because they will be converted to 1/4-20 thread for spark plugs. Already enough. Glow heads if need, enough.
  The thing robot797 really needs are flywheels and tiny magnets to be placed inside the flywheels for timing with an ignition circuit. I’m not sure what he is doing with this part, or needing for this part.
 
 Keep in touch as we gather parts for his project, which by the way is in Holland.

 robot797 did I forget anything?


Happydad RC Plane Old Bugger     United States Hand Shake Netherlands
happydad
happydad
Diamond Member
Diamond Member

I Support My Forum

2020 Supporter

Posts : 1582
Join date : 2012-05-28
Age : 75
Location : Escondido, CA

Back to top Go down

Wanted Re: wanted sure start engines

Post  944_Jim on Thu Aug 13, 2020 9:50 pm

He's doing either electronic ignition with a hall-effect trigger, or he is doing one of the small, cheap points-to-electronic ignition systems. Those are my guesses.

Valving a propane system will be interesting. Most propane systems shoot propane under pressure. While that works on popette valve engines, I will be curious to see how the engine effectively keeps the reed shut against that pressure when not on the intake stroke.

I bet one of the car engines would work well with a boat flywheel. The boat flywheel should be easy enough to have produced if you can't find one on eBay.

I have to watch this one go together. Good luck!
944_Jim
944_Jim
Platinum Member
Platinum Member

2019 Supporter

Posts : 898
Join date : 2017-02-08
Age : 55
Location : NE MS

Back to top Go down

Wanted Re: wanted sure start engines

Post  Oldenginerod on Thu Aug 13, 2020 10:17 pm

The complete Surestart rear ends are readily available through Bernie or Matt and are not expensive. Four the same would ensure consistency. Also, because this is a comparison experiment, it would also be best to use the same # cylinders on all four engines.
Oldenginerod
Oldenginerod
Top Poster
Top Poster

Posts : 3144
Join date : 2012-06-15
Age : 58
Location : Victoria, Australia

Back to top Go down

Wanted i have thought of that

Post  happydad on Thu Aug 13, 2020 11:15 pm

Oldenginerod wrote:The complete Surestart rear ends are readily available through Bernie or Matt and are not expensive.  Four the same would ensure consistency.  Also, because this is a comparison experiment, it would also be best to use the same # cylinders on all four engines.

Oldenginerod: I have thought of that, but this is his project and already I am supplying most of the items, so...

I will do as much as I can as my part as a fellow forum member, but I am honest in what I have available. And my 128tpi backplates already cost me plenty time and $$. I had a few postage stamp and old horseshoe backplate assemblies with needle valve assemblies in them, but what were they, so I had to count threads. Then....., so here is where we are. i have accumulated a lot of "stuff" and most of it needs to go sooner or later. robot797 came along at a good time.
   i am looking at some flywheels used on cars. i asked for details from seller, they are for 1/10 scale cars, so maybe 1inch  O.D. or so. see here.

wanted sure start engines Flywhe10
about $12 for 4 from hong kong, but some US car shops may have them.

>>>>editeded 8-13-2020 9:40p.m. PST. to add another cheaper, in color flywheel >>>>>end edit


wanted sure start engines Flywhe11
view 1

wanted sure start engines Flywhe13
view 2

wanted sure start engines Flywhe12
view 3. colors, cheaper, but from Hong Kong, about 2 to 3 week delivery


happydad RC Plane Old Bugger United States


Last edited by happydad on Thu Aug 13, 2020 11:46 pm; edited 1 time in total (Reason for editing : found more cheaper and in colors)
happydad
happydad
Diamond Member
Diamond Member

I Support My Forum

2020 Supporter

Posts : 1582
Join date : 2012-05-28
Age : 75
Location : Escondido, CA

Back to top Go down

Wanted Re: wanted sure start engines

Post  robot797 on Fri Aug 14, 2020 12:02 pm

the flywheels dont have to be car flywheels
(also nost 1/10 car flywheels have a m5 hole in the middle)
and normal spacer that comes past the starter cam does work

and I do plan on using electronic ignition
because its more common and easyer to replicate

also @944_Jim
low flow propane can be hold into almost any engines carb and it works
see the video on my future propane powered boat motor
robot797
robot797
Gold Member
Gold Member

Posts : 478
Join date : 2013-07-28
Age : 30

Back to top Go down

Wanted We need to find mufflers that direct the exhaust

Post  happydad on Fri Aug 14, 2020 3:36 pm

robot797 wrote:the flywheels dont have to be car flywheels
(also nost 1/10 car flywheels have a m5 hole in the middle)
and normal spacer that comes past the starter cam does work

and I do plan on using electronic ignition
because its more common and easyer to replicate

also @944_Jim
low flow propane can be hold into almost any engines carb and it works
see the video on my future propane powered boat motor

Great video. Now we can see what you are doing with the Cox .049 sure start type engines.
   I think we need to find the old type Cox circular muffler, about 1inch diameter, with a snout, or tube on the side directing the exhaust away, to the side of the engine. They are fairly rare, I think Cox dropped the snout to save money.

Happydad RC Plane Old Bugger    United States Hand Shake Netherlands
happydad
happydad
Diamond Member
Diamond Member

I Support My Forum

2020 Supporter

Posts : 1582
Join date : 2012-05-28
Age : 75
Location : Escondido, CA

Back to top Go down

Wanted Re: wanted sure start engines

Post  robot797 on Fri Aug 14, 2020 4:14 pm

I thought I posted the video bevore
might not have
but that is kind off the plan
but I do have to say this was a crued setup and needs some improving
robot797
robot797
Gold Member
Gold Member

Posts : 478
Join date : 2013-07-28
Age : 30

Back to top Go down

Wanted Grrreeeeaaaat

Post  happydad on Fri Aug 14, 2020 5:09 pm

robot797 wrote:I thought I posted the video bevore
might not have
but that is kind off the plan
but I do have to say this was a crued setup and needs some improving

robot797: It looked great.

Hd RC Plane Old Bugger    United States   Hand Shake Netherlands
happydad
happydad
Diamond Member
Diamond Member

I Support My Forum

2020 Supporter

Posts : 1582
Join date : 2012-05-28
Age : 75
Location : Escondido, CA

Back to top Go down

Wanted Re: wanted sure start engines

Post  robot797 on Fri Aug 14, 2020 5:20 pm

It aslo has to much compression XD
robot797
robot797
Gold Member
Gold Member

Posts : 478
Join date : 2013-07-28
Age : 30

Back to top Go down

Wanted Re: wanted sure start engines

Post  robot797 on Wed Aug 19, 2020 3:28 pm

parts are still wanted!
robot797
robot797
Gold Member
Gold Member

Posts : 478
Join date : 2013-07-28
Age : 30

Back to top Go down

Wanted Re: wanted sure start engines

Post  944_Jim on Wed Aug 19, 2020 6:15 pm

I'm impressed!

So the propane is on low pressure, low feed rate such that the reed can allow the propane in. Does any escape out of the air inlet before the engine draws in the next fual/air charge? Or is the cycle so fast that this isn't a big fuel waste?

How is the ignition triggered? Hall effect magnet and sensor on the front?

All I can say is "Wow!"


Last edited by 944_Jim on Wed Aug 19, 2020 9:09 pm; edited 1 time in total
944_Jim
944_Jim
Platinum Member
Platinum Member

2019 Supporter

Posts : 898
Join date : 2017-02-08
Age : 55
Location : NE MS

Back to top Go down

Wanted Re: wanted sure start engines

Post  NEW222 on Wed Aug 19, 2020 7:25 pm

Now isn't that just plain old awesome! Good job, and thanks for sharing teh video with us.
NEW222
NEW222
Diamond Member
Diamond Member

Posts : 2895
Join date : 2011-08-13
Age : 42
Location : oakbank, mb

Back to top Go down

Wanted Re: wanted sure start engines

Post  robot797 on Thu Aug 20, 2020 12:18 am

There is a bit of a fuel loss but not enough to be noticed
And it is triggered by a hall sensor
robot797
robot797
Gold Member
Gold Member

Posts : 478
Join date : 2013-07-28
Age : 30

Back to top Go down

Wanted Re: wanted sure start engines

Post  Cryhavoc on Sat Aug 22, 2020 7:07 am

robot797 wrote:parts are still wanted!

So what parts are still needed? Trying to read though this thread is like trying to coral cats. Be specific so we can look through our spares and see whats available.
Cryhavoc
Cryhavoc
Bronze Member
Bronze Member

Posts : 41
Join date : 2013-10-29
Age : 54
Location : Copperas Cove, Texas

Back to top Go down

Wanted Re: wanted sure start engines

Post  robot797 on Sat Aug 22, 2020 7:09 am

easy list
backplates (withall stuf that is needed)
props (inc mounting hardware)
happydad has the rest for me
robot797
robot797
Gold Member
Gold Member

Posts : 478
Join date : 2013-07-28
Age : 30

Back to top Go down

Wanted Re: wanted sure start engines

Post  Marleysky on Sat Aug 22, 2020 9:30 am

I understand propane is a cleanburn fuel. Where or how do you get oil into the inner workings of the engine!
Marleysky
Marleysky
Diamond Member
Diamond Member

2019 Supporter

2020 Supporter

Posts : 2758
Join date : 2014-09-28
Age : 67
Location : Grand Rapids, MI

Back to top Go down

Wanted Re: wanted sure start engines

Post  robot797 on Sat Aug 22, 2020 12:02 pm

I have a small tank of oil connected to the original carb
and I use the original needle for oil regulation
robot797
robot797
Gold Member
Gold Member

Posts : 478
Join date : 2013-07-28
Age : 30

Back to top Go down

Wanted Re: wanted sure start engines

Post  Cryhavoc on Sat Aug 22, 2020 11:14 pm

robot797 wrote:easy list
backplates (withall stuf that is needed)
props (inc mounting hardware)
happydad has the rest for me

I have these three backplates. Will they work?
- They have original copper reeds that don't look in too bad of a shape. Maybe they can be cleaned up.
- All three will at least need soaking in alcohol to clean off the castor.
- All three needles turn but are a gummy. two of the needles are aluminum.
- Only one has screws.

wanted sure start engines Backpl11
wanted sure start engines Backpl10
Cryhavoc
Cryhavoc
Bronze Member
Bronze Member

Posts : 41
Join date : 2013-10-29
Age : 54
Location : Copperas Cove, Texas

Back to top Go down

Wanted Not alcohol!

Post  happydad on Sun Aug 23, 2020 1:47 am

Cryhavoc wrote:
robot797 wrote:easy list
backplates (withall stuf that is needed)
props (inc mounting hardware)
happydad has the rest for me

I have these three backplates. Will they work?
- They have original copper reeds that don't look in too bad of a shape. Maybe they can be cleaned up.
- All three will at least need soaking in alcohol to clean off the castor.
- All three needles turn but are a gummy. two of the needles are aluminum.
- Only one has screws.

wanted sure start engines Backpl11
wanted sure start engines Backpl10

Cryhavoc: I don’t use alcohol. It has water in it. I use old fuel, fuel that sat in the tank, but wasn’t burned. When thru testing an engine, I dump the unused fuel into a different container to be used for cleaning engines or engine parts. This fuel may have picked up contamination from the tank, like tiny particles or water, maybe not. Why take a chance for 1 or 2 cc of fuel. After a few engine tests I usually have a few ounces, more than enough to clean an entire engine including the backplate, reed reed retainer and screws. Two Cents

Happydad RC Plane   Jeep  Old Bugger United States
happydad
happydad
Diamond Member
Diamond Member

I Support My Forum

2020 Supporter

Posts : 1582
Join date : 2012-05-28
Age : 75
Location : Escondido, CA

Back to top Go down

Wanted Re: wanted sure start engines

Post  Cryhavoc on Sun Aug 23, 2020 10:10 am


Cryhavoc: I don’t use alcohol. It has water in it. I use old fuel, fuel that sat in the tank, but wasn’t burned. When thru testing an engine, I dump the unused fuel into a different container to be used for cleaning engines or engine parts. This fuel may have picked up contamination from the tank, like tiny particles or water, maybe not. Why take a chance for 1 or 2 cc of fuel. After a few engine tests I usually have a few ounces, more than enough to clean an entire engine including the backplate, reed reed retainer and screws. Two Cents

Happydad RC Plane   Jeep  Old Bugger United States[/quote]

No thanks, I'll stick with alcohol. I use denatured alcohol. Not isopropyl. Using old fuel and the ancillary crud it contains, or even new fuel kinda defeats the purpose of getting the oil off. By the time the parts are cleaned and dried there is zero water so I don't get the argument for not using it. Especially since a gallon is cheap as beans at Home Depot and can be used for all sorts of things like cleaning off epoxy and such.

Mike
Cryhavoc
Cryhavoc
Bronze Member
Bronze Member

Posts : 41
Join date : 2013-10-29
Age : 54
Location : Copperas Cove, Texas

Back to top Go down

Wanted Re: wanted sure start engines

Post  NEW222 on Sun Aug 23, 2020 11:32 am

@Cryhavoc - Can you please put a link to the denturated alcohol that you get from Home Depot. I searched it, bud did not find it so I can see if it is available at Home Depot up here. Best that came up was methyl hydrate and am not sure if that is the same or not. Thank you.
NEW222
NEW222
Diamond Member
Diamond Member

Posts : 2895
Join date : 2011-08-13
Age : 42
Location : oakbank, mb

Back to top Go down

Wanted Forgot 1 step

Post  happydad on Sun Aug 23, 2020 1:05 pm

Cryhavoc wrote:
Cryhavoc: I don’t use alcohol. It has water in it. I use old fuel, fuel that sat in the tank, but wasn’t burned. When thru testing an engine, I dump the unused fuel into a different container to be used for cleaning engines or engine parts. This fuel may have picked up contamination from the tank, like tiny particles or water, maybe not. Why take a chance for 1 or 2 cc of fuel. After a few engine tests I usually have a few ounces, more than enough to clean an entire engine including the backplate, reed reed retainer and screws. Two Cents

Happydad RC Plane   Jeep  Old Bugger United States

No thanks, I'll stick with alcohol. I use denatured alcohol. Not isopropyl. Using old fuel and the ancillary crud it contains, or even new fuel kinda defeats the purpose of getting the oil off. By the time the parts are cleaned and dried there is zero water so I don't get the argument for not using it. Especially since a gallon is cheap as beans at Home Depot and can be used for all sorts of things like cleaning off epoxy and such.

Mike[/quote]

Mike: I forgot to mention after cleaning I ALWAYS use after run oil on all moving parts.

You don’t think I give all my secrets away at one time do you. lol!

The old fuel breaks down the crud, along with an old toothbrush, almost instantaneously. Little waiting. I only have to soak an engine if the crud is so thick the engine won’t turn over, at all, even after heat gun.

And I strain the old fuel as it is used or on the way into the secondary storage.  Two Cents

To each his own.


Happydad RC Plane  Jeep     Old Bugger United States
happydad
happydad
Diamond Member
Diamond Member

I Support My Forum

2020 Supporter

Posts : 1582
Join date : 2012-05-28
Age : 75
Location : Escondido, CA

Back to top Go down

Wanted Re: wanted sure start engines

Post  Levent Suberk on Sun Aug 23, 2020 2:53 pm

I forgot to mention after cleaning I ALWAYS use after run oil on all moving parts.

You don’t think I give all my secrets away at one time do you. lol!

The old fuel breaks down the crud, along with an old toothbrush, almost instantaneously. Little waiting. I only have to soak an engine if the crud is so thick the engine won’t turn over, at all, even after heat gun.

And I strain the old fuel as it is used or on the way into the secondary storage.  Two Cents

To each his own.


Happydad RC Plane  Jeep     Old Bugger United States

Experience speaks Very Happy Old Bugger
Levent Suberk
Levent Suberk
Platinum Member
Platinum Member

Posts : 991
Join date : 2017-12-24
Location : Turkey

Back to top Go down

Wanted Re: wanted sure start engines

Post  Sponsored content


Sponsored content


Back to top Go down

Page 1 of 2 1, 2  Next

Back to top


 
Permissions in this forum:
You cannot reply to topics in this forum