Inverted 4 strokes
Willie Pope
John Kenna wrote:
>
> All my inverted 4 strokes are YS's. They run exceptionally well, but are
> a different design than all the others (no case drain, 15%+ nitro 2 cycle
> fuel). I have seen some OS-120's and Enya 120's that ran well inverted
> WITHOUT on-board glow. All used OS-F plugs and at least 15% nitro (4
> cycle fuel). I have NEVER seen a Saito that will run inverted.
>
> John Kenna
> Mobile, AL
My Saito .56 and .91 both run extremely well inverted. Neither have
onboard glo. you have to lean the bottom end a bit from the upright
position.
Willie
Paul Freeman
Has anybody got any tips or warnings regarding running 4strokes inverted???
I assume it will probobly require an on board glow to stop the fire going
out at low speeds.
How about lubrication ???
Is the rocker cover going to fill with oil and leak every where. And will
there be problems with the crankcase filling with oil?
Any hints or tips will be most welcome.
Paul F
John Kenna
David Turnbull
"Paul Freeman" <mildw...@wn.com.au> wrote:
>
>Has anybody got any tips or warnings regarding running 4strokes inverted???
Use a YS. The air/fuel goes through the crankcase and reduces the problems of
running inverted.
>I assume it will probobly require an on board glow to stop the fire going
>out at low speeds.
Never seen this on a YS.
>How about lubrication ???
How 'bout it. It's a good thing to have lubrication.
>Is the rocker cover going to fill with oil and leak every where. And will
>there be problems with the crankcase filling with oil?
Interesting concern. Something to keep in mind, but I've never heard anything
like this before.
>Any hints or tips will be most welcome.
David AMA# 543851 FCC# N9OMH
Tri Village RCers
http://www.serve.com/tvrc/
go...@idirect.com
In <01bc029f$6be5a900$214a...@mildwaters.wn.com.au>, "Paul Freeman" <mildw...@wn.com.au> writes:
>
>Has anybody got any tips or warnings regarding running 4strokes inverted???
>
>out at low speeds.
>
>Is the rocker cover going to fill with oil and leak every where. And will
>there be problems with the crankcase filling with oil?
>
>
My OS/120 FS runs great inverted....nothing special was done.
Gord Schindler
**********************************************
G. Schindler Associates
455 Rouge Hills Dr.
West Hill, Ont. M1C 2Z6
**********************************************
OS/2 and Communications Manager for OS/2
Consulting and Education
Joe Walker
Please tell me that the Saito motors you have seen were not using onboard
glow drivers! I plan to invert my Saito 1.50 with a glow driver.
John Kenna <GBC...@prodigy.com> wrote in article
<5bj6da$2...@usenetw1.news.prodigy.com>...
Martin G
Got an Enya 90 and OS 91 Surpass inverted and both run fine. I had to put
a Perry Oscillating pump on the plane with the Enya due to my in ability to
locate the fuel tank in line with the carb. In the plane with the OS fuel
tank location was not a problem and so no need for the pump. If you plan
to invert an engine with a pump already built in (YS) you will not have to
worry about fuel tank location, but this seems to be one concern for
inverted 4-strokes. YS engines seem to be made to run inverted so you
shouldn't have any problem with one of them. I run fairly hot plugs in
both engines (OS F type in the OS, and Enya #3 in the Enya), so both will
run without heating the plug, but the idle is definitely better with an
on-board glow system, so I recommend one. The onboard glow also makes for
one less wire to get caught in the prop during starting. One final concern
is the dreaded fuel lock which is said to be more common with inverted
engines. Just be sure to flip the engine through a couple of times before
you start it to be sure fuel hasn't pooled. I've never had or heard of any
problem with drainage of fuel through the vent port with inverted engines.
The OS and Enyna engines have the vent plug in different locations, and it
doesn't seem to be any problem. I also have noted no more fuel leakage
around the valve cover, or anywhere else. For my next project I plan to
invert a Satio 1.50. It will have a Perry pump and onboard glow.
--
Martin G
AMA #240487
Paul Freeman <mildw...@wn.com.au> wrote in article
<01bc029f$6be5a900$214a...@mildwaters.wn.com.au>...
Carl D. Andrews
In article <01bc034b$2f64d8a0$3a50...@server.sumter.net>, "Joe Walker"
<wal...@sumter.net> wrote:
I have run Saito's inverted without glow drivers with no problems.
David Andrews
Palestine, TX
Sigurd Stenersen
My Saito FA80GK runs very well inverted. No onboard glow.
Sigurd
Tsutomu Mabuchi
My OS-120Surpass with pump wouldn't run without
on-board glow.
My friend says OS120 without pump could be better
for inverted use.
They says in Japan that 4-strokes run well inverted
are only YS's.
Tsutomu Mabuchi
Sam and Sonja Sorem
I had a Saito .80 inverted in a CG Chipmunk. It ran like a top.
Absolutely no problems encountered at all, and I did not use any on
board glow. Just my experience.
Sam Sorem
Cliff Leigh
Joe Walker wrote:
>
> Please tell me that the Saito motors you have seen were not using onboard
> glow drivers! I plan to invert my Saito 1.50 with a glow driver.
>
I run a Saito 150 inverted no problems providing that the motor has some
run in (break in)time and the idling mixture is set correctly. One thing
they don't like though is to running them slobbering rich and then
suddenly back off on the throttle which is why I say they need to have
some run in time so that you can set the high speed needle to 100 -150
rpm lest than peak revs. I did originally have problems with the Saito
but once I started leaning out the top end mixture to a reasonable
mixture the problems disspapeared.
Cliff.
Nigel Eaton
In article <01bc029f$6be5a900$214a...@mildwaters.wn.com.
>inverted???
>
I've run a Laser .70 and 1.00, and an OS .26 four strokes inverted,
I've never had any real problems other than the .26 could be a bit
reluctant to start inverted. I just turned the model upside down to
start the engine!
>I assume it will probobly require an on board glow to stop the fire going
>out at low speeds.
>
Nope. (That is, none of mine did)
>How about lubrication ???
>
Yep. (Never had a problem).
>Is the rocker cover going to fill with oil and leak every where. And will
>there be problems with the crankcase filling with oil?
>
Nope (Again, I've never noticed a problem).
Cheers!
--
Nigel
"The Mome Rath hasn't been born that could out-grabe me"
Gordon_Jack
Paul Freeman wrote:
>
> Has anybody got any tips or warnings regarding running 4strokes inverted???
>
> out at low speeds.
>
>
> Is the rocker cover going to fill with oil and leak every where. And will
> there be problems with the crankcase filling with oil?
>
>
> Paul F
What you may be referring to is storing a 4 stroke engine inverted.
When the 4 stroke is running it's position does not come into play.
Even when the motor is idling the acceleration of the moving parts still
exceeds the gravitational force of ol' terra firma.
I have run 4 strokes for a number of years now, about 14 or so, and I
do not find any significant difference in the position in which they are
running. All four strokes since 1987 that I have run have been inverted
and I havn't really noticed any problems.
Gord
Mike
Joe Walker wrote:
>
> Please tell me that the Saito motors you have seen were not using onboard
> glow drivers! I plan to invert my Saito 1.50 with a glow driver.
>
> > a different design than all the others (no case drain, 15%+ nitro 2 cycle
>
> > fuel). I have seen some OS-120's and Enya 120's that ran well inverted
> > WITHOUT on-board glow. All used OS-F plugs and at least 15% nitro (4
> > cycle fuel). I have NEVER seen a Saito that will run inverted.
> >
> > John Kenna
> > Mobile, AL
> >
> >
I have flown a Saito 150 inverted with no on board glow in a CGM Sukhoi
with no problem what so ever. I was running Cool Power 15% in it and
did not notice any leaks.
Mike Sells AMA 471885 IMAA 15864
Mark Silvestro
HI
CAN YOU PLEASE GIVE ME SOME ADVISE ON HOW TO PROPERLY RUN IN A NEW SATIO
FA-80. THE INSTRUCTIONS AREN'T HELPING. I STARTED IT UP WITH FIVE FULL
TURNS ON THE NEDDEL VALVE AND IT RAN SO RICH THAT I COULDN'T ADVANCE THE
THROTLE PAST 1/4. I CAN'T GET ANY MIDRANGE RESPONCE AT ALL. ANY HELP
YOU CAN GIVE ME WOULD BE GREATLY APPR-ED !
THANK'S
MARK
pete shifflett
In article <32D9FE...@ONE.NET>, RI...@ONE.NET says...
>
>John Kenna wrote:
>>
>> All my inverted 4 strokes are YS's. They run exceptionally well, but
are
>> a different design than all the others (no case drain, 15%+ nitro 2
cycle
>> fuel). I have seen some OS-120's and Enya 120's that ran well inverted
>> WITHOUT on-board glow. All used OS-F plugs and at least 15% nitro (4
>> cycle fuel). I have NEVER seen a Saito that will run inverted.
>>
>> John Kenna
>> Mobile, AL
inverted for 5 years. (only when I'm flying guy's) no problems. It has a
idle that i would put up against any engine with or without glo drivers.
William J. Skoros
I ran my older O.S. .60 FS (non-surpass) that way. Did not need an
on-board glow driver to keep it lit . Ran great. Only thing I did was
to start the motor with the plane upside down in a cradle this way, the
motor was upright, and I did not have to worry about flooding it.
Walter, H, Senour
go...@idirect.com wrote:
>
> In <01bc029f$6be5a900$214a...@mildwaters.wn.com.au>, "Paul Freeman" <mildw...@wn.com.au> writes:
> >
> >Has anybody got any tips or warnings regarding running 4strokes inverted???
> >
> >I assume it will probobly require an on board glow to stop the fire going
> >out at low speeds.
> >
> >How about lubrication ???
> >
> >Is the rocker cover going to fill with oil and leak every where. And will
> >there be problems with the crankcase filling with oil?
> >
> >Any hints or tips will be most welcome.
> >
> >Paul F
>
> Gord Schindler
> **********************************************
> G. Schindler Associates
> 455 Rouge Hills Dr.
> West Hill, Ont. M1C 2Z6
> **********************************************
> OS/2 and Communications Manager for OS/2
> Consulting and Education
Check out the patern guys! They run their YS 120s inverted in most
planes with no problem. I've been running one in a CG Extra with no
problem. Booster battery for idle is not required.
ICEMAN
AMA 33699
Ronald Van putte
Amen the ICEMAN. I don't know of any R/C aerobatic fliers who mount
their 4-strokes upright.
Ron
CGolgowski
I fly the same setup as ICEMAN and had the same questions you do.
Supprisingly,
only a small amount of oil is present when I remove the valve cover. I do
fly inverted quite a bit, giving the oil a chance to drain back down the
pushrod tubes. Pehaps the only significant problem I've encountered is
taking off with my clip-on glow plug battery still attached due to not
seeing it. The plane does not seem to mind.