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Post  mitchg95 Mon Mar 12, 2012 5:13 pm

hey, i want to build a cox .049/.051 engine that is total and complete in the power overkill department, can you guys help me with this
thanks
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Post  microflitedude Mon Mar 12, 2012 5:14 pm

TD .051 with high compression head will give you the most power, use a standard head for more RPM.
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Post  mitchg95 Mon Mar 12, 2012 5:17 pm

microflitedude wrote:TD .051 with high compression head will give you the most power, use a standard head for more RPM.

perfect, i have those, what might i expect (rpm) with a golden bee with .051 cylinder/piston set and 4.5x4 prop from bernie
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Post  nitroairplane Mon Mar 12, 2012 5:18 pm

Start with a tee dee 049.
Lighten the psiton.
Add 2 more boost flutes.
get the Heli crank.
Use the 5 fin head adapter and about 4 gaskets.
pressure tap it.
get a tuned muffler.
drill out the venturi.
Get a fine thread needle.
Or JUST DIESEL IT for the most "torque".
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Post  nitroairplane Mon Mar 12, 2012 5:19 pm

mitchg95 wrote:
microflitedude wrote:TD .051 with high compression head will give you the most power, use a standard head for more RPM.

perfect, i have those, what might i expect (rpm) with a golden bee with .051 cylinder/piston set and 4.5x4 prop from bernie
around 20k
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Post  nitroairplane Mon Mar 12, 2012 5:19 pm

The faster you go the more often you gotta replace and refit things.
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Post  mitchg95 Mon Mar 12, 2012 5:20 pm

nitroairplane wrote:Start with a tee dee 049.
Lighten the psiton.
Add 2 more boost flutes.
get the Heli crank.
Use the 5 fin head adapter and about 4 gaskets.
pressure tap it.
get a tuned muffler.
drill out the venturi.
Get a fine thread needle.
Or JUST DIESEL IT for the most "torque".

where can i get a tuned pipe for it?
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Post  nitroairplane Mon Mar 12, 2012 5:22 pm

mitchg95 wrote:
nitroairplane wrote:Start with a tee dee 049.
Lighten the psiton.
Add 2 more boost flutes.
get the Heli crank.
Use the 5 fin head adapter and about 4 gaskets.
pressure tap it.
get a tuned muffler.
drill out the venturi.
Get a fine thread needle.
Or JUST DIESEL IT for the most "torque".

where can i get a tuned pipe for it?
CS enignes sells one but it would have to be adapted to fit a cox.
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Post  mitchg95 Mon Mar 12, 2012 5:23 pm

nitroairplane wrote:
mitchg95 wrote:
nitroairplane wrote:Start with a tee dee 049.
Lighten the psiton.
Add 2 more boost flutes.
get the Heli crank.
Use the 5 fin head adapter and about 4 gaskets.
pressure tap it.
get a tuned muffler.
drill out the venturi.
Get a fine thread needle.
Or JUST DIESEL IT for the most "torque".

where can i get a tuned pipe for it?
CS enignes sells one but it would have to be adapted to fit a cox.

oh, well thats ok, i dont have the stuff to add 2 more boost flutes or adapt the muffler for a cox engine
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Post  nitroairplane Mon Mar 12, 2012 5:24 pm

there are people that can do it for you Smile
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Post  mitchg95 Mon Mar 12, 2012 5:27 pm

nitroairplane wrote:there are people that can do it for you Smile

oh yeah
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Post  nitroairplane Mon Mar 12, 2012 5:27 pm

mitchg95 wrote:
nitroairplane wrote:there are people that can do it for you Smile

oh yeah
PM'd
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Post  mitchg95 Mon Mar 12, 2012 5:28 pm

nitroairplane wrote:
mitchg95 wrote:
nitroairplane wrote:there are people that can do it for you Smile

oh yeah
PM'd

ok
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Post  nitroairplane Mon Mar 12, 2012 5:31 pm

mitchg95 wrote:
nitroairplane wrote:
mitchg95 wrote:
nitroairplane wrote:there are people that can do it for you Smile

oh yeah
PM'd

ok
cool Wink
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Post  SuperDave Mon Mar 12, 2012 5:32 pm

Mitch:

How did your final exams go hummmmmmmmmmm..............??????????? what is the most powerful cox .049 3929217648 what is the most powerful cox .049 3929217648 what is the most powerful cox .049 3929217648

Work before play my friend.
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Post  mitchg95 Mon Mar 12, 2012 5:34 pm

SuperDave wrote:Mitch:

How did your final exams go hummmmmmmmmmm..............??????????? what is the most powerful cox .049 3929217648 what is the most powerful cox .049 3929217648 what is the most powerful cox .049 3929217648

Work before play my friend.

there going good so far, thanks Dave for keeping on me to keep focused
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Post  Surfer_kris Mon Mar 12, 2012 5:43 pm

nitroairplane wrote:Start with a tee dee 049.
Lighten the psiton.
Add 2 more boost flutes.
get the Heli crank.
Use the 5 fin head adapter and about 4 gaskets.
pressure tap it.
get a tuned muffler.
drill out the venturi.
Get a fine thread needle.
Or JUST DIESEL IT for the most "torque".

Have you tried any of these mods yourself?
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Post  Surfer_kris Mon Mar 12, 2012 5:45 pm

microflitedude wrote:TD .051 with high compression head will give you the most power, use a standard head for more RPM.

This doesn't make any sense, more rpm means more power.
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Post  nitroairplane Mon Mar 12, 2012 5:45 pm

Surfer_kris wrote:
microflitedude wrote:TD .051 with high compression head will give you the most power, use a standard head for more RPM.

This doesn't make any sense, more rpm means more power.
Well depending on what prop you are running yes it really does.
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Post  nitroairplane Mon Mar 12, 2012 5:46 pm

Surfer_kris wrote:
nitroairplane wrote:Start with a tee dee 049.
Lighten the psiton.
Add 2 more boost flutes.
get the Heli crank.
Use the 5 fin head adapter and about 4 gaskets.
pressure tap it.
get a tuned muffler.
drill out the venturi.
Get a fine thread needle.
Or JUST DIESEL IT for the most "torque".

Have you tried any of these mods yourself?
All apart from the heli crank and tuned muffler.
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Post  Surfer_kris Mon Mar 12, 2012 5:50 pm

nitroairplane wrote:
Surfer_kris wrote:
microflitedude wrote:TD .051 with high compression head will give you the most power, use a standard head for more RPM.

This doesn't make any sense, more rpm means more power.
Well depending on what prop you are running yes it really does.

Well assuming the same prop of course. You cannot not make more rpm without making more power.
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Post  nitroairplane Mon Mar 12, 2012 5:52 pm

Surfer_kris wrote:
nitroairplane wrote:
Surfer_kris wrote:
microflitedude wrote:TD .051 with high compression head will give you the most power, use a standard head for more RPM.

This doesn't make any sense, more rpm means more power.
Well depending on what prop you are running yes it really does.

Well assuming the same prop of course. You cannot not make more rpm without making more power.
True I only really fly .049's with a 6x3 prop or more anything less i feel they sound like the are going fast but don't really have that PULL that I love.
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Post  Surfer_kris Mon Mar 12, 2012 5:55 pm

This is perhaps what the original question is about (from aerotools);

what is the most powerful cox .049 Cox_performance_2
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Post  nitroairplane Mon Mar 12, 2012 5:58 pm

Also prop choice is very important as some tend to flatten out at higher rpm.
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Post  Surfer_kris Mon Mar 12, 2012 5:59 pm

nitroairplane wrote:
True I only really fly .049's with a 6x3 prop or more anything less i feel they sound like the are going fast but don't really have that PULL that I love.

The 6x3 is a little big for the engine, if you build something lighter and slimmer (plane that is) you can use a smaller prop and then really have the engine get into song.
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