Run times?

AT1984 Tue Sep 13, 2011 11:21 pm

What are you guys getting for approximate run times on Cox .049's with 5cc and 8cc tanks? I'm asking because I'm thinking of trying a 1/2A plane.

Thanks,

Allen

Cz10 Tue Sep 13, 2011 11:53 pm

I haven't timed it ( I only ran a BW a couple of times the other day - first nitro engine in a good 25 years), but it depends somewhat on where you are in your CL experience. You will likely at some point not in the too distant future want longer flites then what even the 8 cc will deliver. Just ask RknRusty about his project to install an external fuel tank so he could do the full stunt pattern. The tank was empty at the end if my test runs and they weren't very long runs - I would guess 4 minutes max. But that IS an awfully long time ( at least at first ) to be standing in one spot spinning around, too. An intregal tank certianly makes things a LOT easier, though, both in airframe construction and plumbing.

**Admin** Wed Sep 14, 2011 12:01 am

On the test stands, depending on the engine and mixture, I usually get 3-4 minutes out of a 5cc tank and 4-5 minutes out of a 8cc tank.

AT1984 Wed Sep 14, 2011 12:03 am

Thanks for the replies!

Allen

nitroairplane Wed Sep 14, 2011 1:53 am

AT1984 wrote:Thanks for the replies!

Allen

Then there are the option of tank extenders I think they add 2cc.

GermanBeez Wed Sep 14, 2011 6:37 am

yep, thats about right. although, my super bee seems to empty its tank a little faster than a normal one.
maybe its because of the dual bypass ports...

GermanBeez Wed Sep 14, 2011 6:38 am

AT1984 wrote:What are you guys getting for approximate run times on Cox .049's with 5cc and 8cc tanks? I'm asking because I'm thinking of trying a 1/2A plane.

Thanks,

Allen

hmmm, looks like minglowplanes.com has got us both hooked on buying one, huh?? Very Happy

nitroairplane Wed Sep 14, 2011 7:00 am

GermanBeez wrote:yep, thats about right. although, my super bee seems to empty its tank a little faster than a normal one.
maybe its because of the dual bypass ports...

That's just because it's running dater on the same setting.

nitroairplane Wed Sep 14, 2011 7:00 am

GermanBeez wrote:yep, thats about right. although, my super bee seems to empty its tank a little faster than a normal one.
maybe its because of the dual bypass ports...

That's just because it's running dater on the same setting.

GermanBeez Wed Sep 14, 2011 7:11 am

dater?

microflitedude Wed Sep 14, 2011 7:24 am

Never heard of one running on the dater side.... Very Happy

It seems like I get more like 3 minutes on 8cc and 2 on 5cc, or maybe it's just me.

AT1984 Wed Sep 14, 2011 8:43 am

I was actually looking at smaller planes when I started out in C/L a few months ago. I'm still a rookie! I'm looking for something simple...a Sig Deweybird, Goldberg Stuntman, etc. I have a "big" plane, too. A Skyray 35.

Allen

GermanBeez Wed Sep 14, 2011 8:58 am

Get what i'll get:
Black Hawk PT-19.
its as simple as it gets and its THE classic cox C/L plane.

SuperDave Wed Sep 14, 2011 9:21 am

[quote="microflitedude"]Never heard of one running on the dater side.... Very Happy

Dude: Oh, picky, picky, picky! Let's not go there because we ALL make mistakes. Consider the context in which "dater was used.

On my Dumas Airboat w/Surestart & throttle I run a 2 oz. Sullivan tank that gives me LOTS of "run time". The trottle allows me to run until I wish to bring the boat back to shore where I can "kill" the engine with the throttle.

SD

Cz10 Wed Sep 14, 2011 9:32 am

Dater

It's that iPhone spell check again.

GermanBeez Wed Sep 14, 2011 9:33 am

[quote="SuperDave"]

microflitedude wrote:Never heard of one running on the dater side....

Dude: Oh, picky, picky, picky! Let's not go there because we ALL make mistakes. Consider the context in which "dater was used.

On my Dumas Airboat w/Surestart & throttle I run a 2 oz. Sullivan tank that gives me LOTS of "run time". The trottle allows me to run until I wish to bring the boat back to shore where I can "kill" the engine with the throttle.

SD

no, i really have no clue what that meant. sorry.

GermanBeez Wed Sep 14, 2011 10:17 am

thanks! that sounds plausible...two ports = more fuel getting into the engine => faster running, but faster fuel consumption

microflitedude Wed Sep 14, 2011 10:39 am

nitroairplane wrote:
nitroairplane wrote:
GermanBeez wrote:yep, thats about right. although, my super bee seems to empty its tank a little faster than a normal one.
maybe its because of the dual bypass ports...
That's just because it's running faster on the same setting.

Doesn't look like you posted anything?

nitroairplane Wed Sep 14, 2011 10:41 am

sorry i didnt mean to post that ill delete it now.

**RknRusty** Wed Sep 14, 2011 12:12 pm

Y'all get a lot more than me. With my pickup tube set just above the lower outboard screw, my Black Widows all get 1:40 with an 8cc tank on the test stand. Probably more in the air since the fuel rises up that side of the tank. I seems longer, but I'll time it next time I fly. Or I'll tip the test stand over to simulate C/L flying.

nitroairplane Wed Sep 14, 2011 12:15 pm

RknRusty wrote:Y'all get a lot more than me. With my pickup tube set just above the lower outboard screw, my Black Widows all get 1:40 with an 8cc tank on the test stand. Probably more in the air since the fuel rises up that side of the tank. I seems longer, but I'll time it next time I fly. Or I'll tip the test stand over to simulate C/L flying.

sounds like you have a leak or are running super rich.

microflitedude Wed Sep 14, 2011 12:19 pm

nitroairplane wrote:
RknRusty wrote:Y'all get a lot more than me. With my pickup tube set just above the lower outboard screw, my Black Widows all get 1:40 with an 8cc tank on the test stand. Probably more in the air since the fuel rises up that side of the tank. I seems longer, but I'll time it next time I fly. Or I'll tip the test stand over to simulate C/L flying.

sounds like you have a leak or are running super rich.

When I took my babe bee apart, I found I couldn't get the tube on the bottom, just about 3/4 of the way down. The venturi tube got in the way.

GermanBeez Wed Sep 14, 2011 12:35 pm

that's normal. did you try bending the tube around the venturi?

**RknRusty** Wed Sep 14, 2011 12:40 pm

nitroairplane wrote:
RknRusty wrote:Y'all get a lot more than me. With my pickup tube set just above the lower outboard screw, my Black Widows all get 1:40 with an 8cc tank on the test stand. Probably more in the air since the fuel rises up that side of the tank. I seems longer, but I'll time it next time I fly. Or I'll tip the test stand over to simulate C/L flying.

sounds like you have a leak or are running super rich.

Not running rich or leaky, they all run full speed and steady. Maybe I have my pickup higher up the side than everyone else so it doesn't suck air when it's upside down(which it sometimes does anyway). I'll crank one tonight and make a video so we can get a time on it.

nitroairplane Wed Sep 14, 2011 12:45 pm

ok that would make sense maybe you should just do one run and take it apart so you can see if there is any fuel left.

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