Many years ago ( I can't even remember that far back anymore!) I quit
running engines in an upright position for this reason. I know you'd have
to
do some surgery on the twist to change it though.
"Lyman Slack" <lyslack@[EMAIL PROTECTED]
> wrote in message
news:KEa9k.13557$3F5.7209@[EMAIL PROTECTED]
> Storm --
>
> I concur with the others that the tank is too low in relation to the
> carb. However, I'm also aware that you realistically cannot raise the
tank
> on the Twist. Talking to one of our resident experts at the field today,
> he said his fix was to rotate the engine sidewise; i.e., the cylinder on
> the right side on the model.
>
> Ideally, the tank center line should be at or no more than 1/2" below
> the carb spraybar.
>
> If you still prefer to keep your original set up, an alternate
solution
> is to add a Perry Pump in the fuel system.
>
> Cheers -- \_________Lyman Slack________/
> \_______Flying Gators R/C___/
> \_____AMA 6430 LM____ /
> \___Gainesville FL_____/
> Visit my Web Site at www.LymanSlack.com
>
> "On so-called global warming or climate change, let us not scare
ourselves
> with catastrophic forecasts, or use them to defend and promote
irrational
> interventions in human lives."
>
> "Stormlord" <Stormlord.3bncon@[EMAIL PROTECTED]
> wrote in message
> news:Stormlord.3bncon@[EMAIL PROTECTED]
>>
>> I have a fairly new (less than a year old) OS .61FX mounted upright in
a
>> Twist 3D 60 with a 13x6 prop. The engine has been properly broke in
and
>> has about 20 flights on it.
>> I'm having a problem that I'm not sure how to solve.
>> When flying the plane at around 1/4 throttle, if I fly inverted, it
>> will die and I have to dead-stick the plane to the ground.
>> It doesn't seem to happen when I do this at 3/4 or higher throttle, but
>> it does stutter from time to time, it just doesn't quit.
>> I never have a problem whatsoever if I don't fly inverted ... runs
>> through a tank of fuel just fine and I can do anything I want with the
>> plane.
>>
>> At first, I thought the clunk was getting stuck and sucking air, but
>> this is not the case.
>> The clunk is free and not getting hung up anywhere ... also, when the
>> plane lands dead-stick, upon inspection, there is fuel in the fuel line
>> all the way to the carb with no air bubbles in it.
>>
>> Is there a way to correct this problem? Anyone ever had this happen
>> before? I'm not sure where to start, I've never had this issue
>> previously.
>>
>> I've tried leaning and richening the engine with the main needle valve
>> (no difference - the problem is repeatable), and I've changed to a
>> hotter glow plug (from an OS 8 to a 3) so far.
>>
>> I'm just not sure what's causing the condition, so I'm not sure what to
>> try to fix it.
>>
>> Could the engine be flooding itself upside down somehow, causing the
>> glow plug to foul out? What would cause that and how can it be
>> corrected?
>>
>> I pulled the glow plug after one of the dead-stick landings and it was
>> not wet, but with a hot engine, I thought maybe it had eva****ated after
>> normal level flight had resumed (even though the engine was not
>> running).
>>
>> Just not sure where to go with this and I'm searching for some ideas to
>> try ....
>>
>>
>> --
>> Stormlord
>
>
>> I have a fairly new (less than a year old) OS .61FX mounted upright in
a
>> Twist 3D 60 with a 13x6 prop. The engine has been properly broke in
and
>> has about 20 flights on it.
>> I'm having a problem that I'm not sure how to solve.
>> When flying the plane at around 1/4 throttle, if I fly inverted, it
>> will die and I have to dead-stick the plane to the ground.
>> It doesn't seem to happen when I do this at 3/4 or higher throttle, but
>> it does stutter from time to time, it just doesn't quit.
>> I never have a problem whatsoever if I don't fly inverted ... runs
>> through a tank of fuel just fine and I can do anything I want with the
>> plane.
>>
>> At first, I thought the clunk was getting stuck and sucking air, but
>> this is not the case.
>> The clunk is free and not getting hung up anywhere ... also, when the
>> plane lands dead-stick, upon inspection, there is fuel in the fuel line
>> all the way to the carb with no air bubbles in it.
>>
>> Is there a way to correct this problem? Anyone ever had this happen
>> before? I'm not sure where to start, I've never had this issue
>> previously.
>>
>> I've tried leaning and richening the engine with the main needle valve
>> (no difference - the problem is repeatable), and I've changed to a
>> hotter glow plug (from an OS 8 to a 3) so far.
>>
>> I'm just not sure what's causing the condition, so I'm not sure what to
>> try to fix it.
>>
>> Could the engine be flooding itself upside down somehow, causing the
>> glow plug to foul out? What would cause that and how can it be
>> corrected?
>>
>> I pulled the glow plug after one of the dead-stick landings and it was
>> not wet, but with a hot engine, I thought maybe it had eva****ated after
>> normal level flight had resumed (even though the engine was not
>> running).
>>
>> Just not sure where to go with this and I'm searching for some ideas to
>> try ....
>>
>>
>> --
>> Stormlord
>>
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>> Stormlord's Profile: http://www.rcgroups.com/forums/member.php?u=65667
>> View this thread:
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>>
>
>
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