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Old Jan 03, 2012, 09:39 AM
Why the dirt on the wings?
moparmyway's Avatar
New York
Joined Jan 2009
4,997 Posts
Quote:
Originally Posted by Airplanekid333 View Post
Sorry my mistake... its the APC style propeller 7x6-E
My goodness .................
For your next flight why not try an APC 7x7 Sport prop ?

You will enjoy longer flight time as well as increased top speed with an added bonus of drawing less amperage from your LiPo batts. Your motor will smile as she runs even cooler than she does now.

You would be faster than you are now !!!!
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Old Jan 03, 2012, 04:01 PM
Boycot Crappy CC Controllers
snoshoe62's Avatar
United States, MI, Port Huron
Joined Jun 2006
1,955 Posts
Quote:
Originally Posted by moparmyway View Post
My goodness .................
For your next flight why not try an APC 7x7 Sport prop ?

You will enjoy longer flight time as well as increased top speed with an added bonus of drawing less amperage from your LiPo batts. Your motor will smile as she runs even cooler than she does now.

You would be faster than you are now !!!!
Mopar, which is a preferred prop, Pylon or sport? Given same size which would draw more current and tip a little more speed?
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Old Jan 03, 2012, 04:18 PM
Livin it UP when Im goin DOWN
Arcteryxxx's Avatar
Norway, Telemark, Skien
Joined Feb 2010
4,350 Posts
Not the same size: Sport comes in 6", 7", 8".... Pylon is basically 6.5". Then there are other types as Combat15 at 6.3x4" and Q40 at 7.4"...
Check the APC homepage...
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Old Jan 03, 2012, 04:45 PM
Boycot Crappy CC Controllers
snoshoe62's Avatar
United States, MI, Port Huron
Joined Jun 2006
1,955 Posts
Quote:
Originally Posted by Arcteryxxx View Post
Not the same size: Sport comes in 6", 7", 8".... Pylon is basically 6.5". Then there are other types as Combat15 at 6.3x4" and Q40 at 7.4"...
Check the APC homepage...
Ahh, I stand corrected. I have some pylons, didnt know they were all 6.5's
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Old Jan 03, 2012, 04:48 PM
Why the dirt on the wings?
moparmyway's Avatar
New York
Joined Jan 2009
4,997 Posts
Quote:
Originally Posted by snoshoe62 View Post
Mopar, which is a preferred prop, ?
Since Arctery already gave you the main scoop, I will just add that I have seen the 7x7 Sport rise above the 7x6 and 7x8 as far as speed goes with the FJU. Customize the 7x7 slightly, balance it perfectly and you have a VERY efficient and speedy 7" pitch prop !!

One thing ........... 7x7 vs 7x8
The 7x8 was marginally faster (1-2 mph) in some runs, but the power level needed for the same speed as the 7x7 was rediculous. In some of those earlier test runs, I have the 7x7 as being faster than the 7x8. Maybe the 4 different motors I used were all @ their peak efficiency with 7x7 and pushed too hard with 7x8 .................... or maybe the square 7x7 is just one butt kicking prop !!

You are limited to 6.5" pitch with the Pylon props, however, you can trim a 7" Sport down to 6.75" or 6.5" and have the 7" or 8" pitch you might be looking for and have the 6.5" diameter you might want. Just need to measure and balance with extra focus and attention to detail !!
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Old Jan 03, 2012, 04:50 PM
Why the dirt on the wings?
moparmyway's Avatar
New York
Joined Jan 2009
4,997 Posts
Something new to try in my FJU
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Old Jan 03, 2012, 11:25 PM
"Every boy has a dream to fly"
Airplanekid333's Avatar
Fort Collins Colorado
Joined Sep 2009
510 Posts
mop, my work and a APC 7x6e and a JXF 7x6, i will get you a video tomorrow
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Old Jan 04, 2012, 12:26 AM
Registered User
GryphonRCU's Avatar
United States, CA, SF
Joined Mar 2008
3,848 Posts
Mopar,

You already heard my speed estimate.

I wish you the best runs ever.



Gryphon
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Old Jan 04, 2012, 05:41 AM
186mph Funjet Ultra
E-speed buff's Avatar
nieuw vennep, the netherlands
Joined Feb 2010
506 Posts
Mopar

What speed and rpm are you talking about with the 7x7 and 7x8APC sport?
With my setup (minipyro on 6S) the 7x7 was much slower and lacked acccelleration on the FJU.
At speed the current went way down with the 7X8APC.
When you come close to 190mph the 7x7 tip speed comes close to mach1 and loses efficiency very fast.

Grtz René
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Old Jan 04, 2012, 09:12 AM
Why the dirt on the wings?
moparmyway's Avatar
New York
Joined Jan 2009
4,997 Posts
Quote:
Originally Posted by E-speed buff View Post
Mopar

What speed and rpm are you talking about with the 7x7 and 7x8APC sport?
With my setup (minipyro on 6S) the 7x7 was much slower and lacked acccelleration on the FJU.
At speed the current went way down with the 7X8APC.
When you come close to 190mph the 7x7 tip speed comes close to mach1 and loses efficiency very fast.

Grtz René
These have been in the 150-160 pitch speed ranges, and then you must account for the decreased diameter, its not a 7" prop anymore.

I have seen 7x8 props unload as much as 20%

Just curious to see how it plays out at much higher rpm's
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Old Jan 04, 2012, 01:40 PM
Fast? I got something 4 ya!
XtremeWingRC's Avatar
United States, WI, Oak Creek
Joined Oct 2007
2,518 Posts
Quote:
Originally Posted by moparmyway View Post
Something new to try in my FJU
i like that setup man. what is the ballpark speed on that monster?

casey
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Old Jan 04, 2012, 05:07 PM
"Every boy has a dream to fly"
Airplanekid333's Avatar
Fort Collins Colorado
Joined Sep 2009
510 Posts
Houston, we have a problem...
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Old Jan 04, 2012, 05:36 PM
Boycot Crappy CC Controllers
snoshoe62's Avatar
United States, MI, Port Huron
Joined Jun 2006
1,955 Posts
Quote:
Originally Posted by Airplanekid333 View Post
Houston, we have a problem...
That will buff right out.......What happened, sorry for your loss
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Old Jan 04, 2012, 06:18 PM
"Every boy has a dream to fly"
Airplanekid333's Avatar
Fort Collins Colorado
Joined Sep 2009
510 Posts
I am not exactly sure what happened. I'm super bummed though. Battery is bent badly too
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Old Jan 04, 2012, 06:31 PM
Boycot Crappy CC Controllers
snoshoe62's Avatar
United States, MI, Port Huron
Joined Jun 2006
1,955 Posts
Can you describe what happened? How fast were you going? Did it spiral out of control? Did you lose signal...meaning did it just go into a controlled crash?
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