Do I need a tunnel for an in-fuselage full pipe installation?
09-09-2005, 07:34 AM
#1
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Do I need a tunnel for an in-fuselage full pipe installation?
I am planning the installation of a AMT pipe with my new ZDZ 50 NG.
Do I need to built a tunnel for this pipe if go in-fuselage configuration?
May I break-in the engine with its pipe installed? or I should rather install an in-cowl muffler for this process, then install, test and tune the pipe later on?
Do I need to built a tunnel for this pipe if go in-fuselage configuration?
May I break-in the engine with its pipe installed? or I should rather install an in-cowl muffler for this process, then install, test and tune the pipe later on?
09-09-2005, 08:23 AM
#2
RE: Do I need a tunnel for an in-fuselage full pipe installation?
break in- just assemble the plane and fly it
make sure you have good cooling -put on a prop that runs fast on it -on a slightly rich setting and 32-1 Mobil and fly it
Pipes can add more heat as the engine produce can more power--- but by flying it at low/mid/high power settings , the engine gets the best chance to seat in the ring (that's all you are breaking in) .
There is no "break in " period---some engines seal well and run hard from day one -some take more time -it does not matter as long as you watch the heat - so just let it run easily and use it .
Just about any 22x8 is fine tho I like the narrow blade stuf till I get it all sorted out .
Mine on the Bambula, loads heavily on the ground -6700 -so if it were to be run on th ground flat out -it would get hort
but going to a lighter load that lets it run closer to 7000 or so is just producing less heat.
In the air -the Bambula is great - quiet excellent thrust/speed andmdium power settings will do all the "flying" maneuvers
Not a good prop tho for extended hover-recover - a narrow blade 23x8 which turns far faster -is better for that .
make sure you have good cooling -put on a prop that runs fast on it -on a slightly rich setting and 32-1 Mobil and fly it
Pipes can add more heat as the engine produce can more power--- but by flying it at low/mid/high power settings , the engine gets the best chance to seat in the ring (that's all you are breaking in) .
There is no "break in " period---some engines seal well and run hard from day one -some take more time -it does not matter as long as you watch the heat - so just let it run easily and use it .
Just about any 22x8 is fine tho I like the narrow blade stuf till I get it all sorted out .
Mine on the Bambula, loads heavily on the ground -6700 -so if it were to be run on th ground flat out -it would get hort
but going to a lighter load that lets it run closer to 7000 or so is just producing less heat.
In the air -the Bambula is great - quiet excellent thrust/speed andmdium power settings will do all the "flying" maneuvers
Not a good prop tho for extended hover-recover - a narrow blade 23x8 which turns far faster -is better for that .
09-09-2005, 12:16 PM
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RE: Do I need a tunnel for an in-fuselage full pipe installation?
Thanks Dick
I will take care of not loading the engine too much at the beginning (no 3D ). I am planning to run the engine with 20X10 for the first 4 gal, BTW this is pretty much what friend of mine did with this ZDZ 50 NG.
The only difference is that I am going to install a pipe; which as per your recommendations is OK even during the break-in period.
Only to make sure that I got it right; so no tunnel is necessary to cool off the pipe if it goes installed inside the fuselage?
I will take care of not loading the engine too much at the beginning (no 3D ). I am planning to run the engine with 20X10 for the first 4 gal, BTW this is pretty much what friend of mine did with this ZDZ 50 NG.
The only difference is that I am going to install a pipe; which as per your recommendations is OK even during the break-in period.
Only to make sure that I got it right; so no tunnel is necessary to cool off the pipe if it goes installed inside the fuselage?
09-09-2005, 02:16 PM
#4
RE: Do I need a tunnel for an in-fuselage full pipe installation?
I did not understad you - You do need air to circulate -somehow around / over/ past the pipe - If there is airflow OUT the fuselage - then that is fine
I like a tunnel -open to bottom of plane -keeps it all tidy
I like a tunnel -open to bottom of plane -keeps it all tidy
