Welcome to The FlyingGiants! - please login or click this bar to join our community...

 

Welcome to The FlyingGiants Community! We're all about fun, and inside you'll find the greatest, friendliest, and most helpful group of people around! If this is your first time visiting, please check out site, and click here to sign up! We hope to see you soon!!

Go Back   FlyingGiants > Event Coverage Archive > 2013 Joe Nall
Forgot your password? Create a new account


Reply
 
Thread Tools
Old 02-06-2013, 08:31 AM   #61
Josh Price
3DHS Trunk-Monkey
 
Josh Price's Avatar
 
Join Date: May 2006
Location: Arkansas
Age: 32
Posts: 4,251
Awards Showcase
Japaleno Bad Ass: This is to say thank you for donating  funds to help bring Wesse to the 09 Joe Nall! - Issue reason: Thank you so much! Wesse's Haaard Man Award!: For showing our community the joy of eating jap-a-lin-os and being a haaaard man! Wesse Power! - Issue reason: You are a haaaard man! Hard man video award! 
Total Awards: 2
Default

correct. the tips of the prop go super sonic. larger props take fewer rpms to cause this and flexable props make it easier as they flex and the motor has less resistance to reach the higher rpms. Below is how to figure tip speed and how to guage what you can do with a motor to prop it correctly. The problem is finding out what the motor is capable of turning with out effecting the spool up time and the rpms to the point it is no longer effective for what we are doing
http://www.pponk.com/HTML%20PAGES/propcalc.html

or

1
Calculate propeller tip speed in miles per hour by multiplying prop diameter, RPM, and the constant 0.002975. For example, 32 inches multiplied by 6,800 RPM and 0.002975 equals 647.36 miles per hour.


2
Calculate the speed of sound for the given ambient temperature by adding 460 to it, taking the square root, then multiplying by 33.4. For 59 degrees Fahrenheit, add 59 and 460 to obtain 519. The square root of 519 is 22.78. Lastly, 22.78 multiplied by 33.4 yields 760.9 miles per hour.


3
Divide the tip speed in miles per hour by the speed of sound. In our example, 618.8 divided by 760.9 gives you a mach speed of 0.813.
__________________
Team Futaba
Falcon Props
SmartFly
4Titude Rc,
Josh Price is offline   Reply With Quote
Old 02-06-2013, 08:40 AM   #62
dookieshoot
Pro kool aid drinker
 
dookieshoot's Avatar
 
Join Date: Feb 2010
Location: Mass
Age: 33
Posts: 282
Default

I love a high speed pass, prop rip, and everything that goes along with it...
But that sound travels a loooooong distance. I think some people here are getting their panties in a wrinkle. It's "suggested" that you guys with them big beautiful planes take others enjoyment into consideration. That's all.

I have to get started building my plane for the Nall, omp hybrid edge. Maybe a couple homebrew foamies as well. If I'm lucky one of you guys will give me a pull on one of your big birds! Can't wait to get there, first time and if we all heed the "suggestion" there will be many more Nalls to come.
dookieshoot is offline   Reply With Quote
Old 02-06-2013, 09:05 AM   #63
wmat7039
SILVER FOX
 
wmat7039's Avatar
 
Join Date: Jan 2006
Location: Acworth GA
Posts: 1,436
Default

Quote: Originally Posted by Josh Price
View Post
correct. the tips of the prop go super sonic. larger props take fewer rpms to cause this and flexable props make it easier as they flex and the motor has less resistance to reach the higher rpms. Below is how to figure tip speed and how to guage what you can do with a motor to prop it correctly. The problem is finding out what the motor is capable of turning with out effecting the spool up time and the rpms to the point it is no longer effective for what we are doing
http://www.pponk.com/HTML%20PAGES/propcalc.html

or

1
Calculate propeller tip speed in miles per hour by multiplying prop diameter, RPM, and the constant 0.002975. For example, 32 inches multiplied by 6,800 RPM and 0.002975 equals 647.36 miles per hour.


2
Calculate the speed of sound for the given ambient temperature by adding 460 to it, taking the square root, then multiplying by 33.4. For 59 degrees Fahrenheit, add 59 and 460 to obtain 519. The square root of 519 is 22.78. Lastly, 22.78 multiplied by 33.4 yields 760.9 miles per hour.


3
Divide the tip speed in miles per hour by the speed of sound. In our example, 618.8 divided by 760.9 gives you a mach speed of 0.813.
We have had this chart made up by George Hicks from Gulfstream in IMAC for MANY years.

Gives a very good indication to pilots.
Wayne
Attached Thumbnails
  • Click image for larger version

Name:	proptip2.jpg
Views:	75
Size:	80.9 KB
ID:	539218 80.9 KB · Views: 75

__________________
The value of experience is not in seeing much, but in seeing wisely.
wmat7039 is offline   Reply With Quote
Old 02-06-2013, 09:06 AM   #64
andyjuice22
Fly Hard! Land Soft...
 
andyjuice22's Avatar
 
Join Date: Sep 2012
Location: United States, OH, Middleburg Heights
Posts: 676
Send a message via Skype™ to andyjuice22
Default

Quote: Originally Posted by dookieshoot
View Post
I love a high speed pass, prop rip, and everything that goes along with it...
But that sound travels a loooooong distance. I think some people here are getting their panties in a wrinkle. It's "suggested" that you guys with them big beautiful planes take others enjoyment into consideration. That's all.

I have to get started building my plane for the Nall, omp hybrid edge. Maybe a couple homebrew foamies as well. If I'm lucky one of you guys will give me a pull on one of your big birds! Can't wait to get there, first time and if we all heed the "suggestion" there will be many more Nalls to come.
i kinda agree with you it is cool to do a fast and loud pass. but when people do them all day it is just too much noise and people start to complain.
andyjuice22 is offline   Reply With Quote
Old 02-06-2013, 09:43 AM   #65
ken crane
I WENT ALL IN AT JOE NALL 2013
 
ken crane's Avatar
 
Join Date: Dec 2007
Location: SUNNY CAPE COD MA.
Posts: 1,482
Default

Quote: Originally Posted by andyjuice22
View Post
i kinda agree with you it is cool to do a fast and loud pass. but when people do them all day it is just too much noise and people start to complain.
lol and for you guys that have never been about the 4th day of 7 it gets old no matter how much you love noise !
__________________

http://www.planebenderproducts.com/
unless it says pro-flow its not worthy of your hard earned money!
ken crane is offline   Reply With Quote
Old 02-06-2013, 09:55 AM   #66
dookieshoot
Pro kool aid drinker
 
dookieshoot's Avatar
 
Join Date: Feb 2010
Location: Mass
Age: 33
Posts: 282
Default

Your absolutely right, it does get old. Rip em up on your home turf is what I should have said, but when at an event with a gagillion people have diligence and respect for your fellow man!

If you guys see a halfa$$ed hybrid with ugly wrinkled covering that'll be me! Come on over and hi!
dookieshoot is offline   Reply With Quote
Old 02-06-2013, 10:25 AM   #67
wylieruneyjr
RUTNBUC
 
wylieruneyjr's Avatar
 
Join Date: Sep 2008
Location: McClellanville South Carolina
Age: 50
Posts: 2,515
Default

I enjoyed the machine gun vs rc plane vid. I would kill, to get to run about 6000 rounds thorugh the minigun. Dillon builds awesome weapons for sure. And the mg42 was bad azz too.
I have flown the DLE 170 on stock mufflers at Joe Nall , no problem. Cause I used the throttle stick with forethought.
__________________
Hear me Now, Believe me Later !
wylieruneyjr is offline   Reply With Quote
Old 03-20-2013, 08:49 PM   #68
mikepq
Professor Mike
 
mikepq's Avatar
 
Join Date: Oct 2008
Location: United States, VT, Jericho
Posts: 665
Send a message via AIM to mikepq
Default

/
__________________
We Never really grow up, we only learn how to act in public!
mikepq is offline   Reply With Quote
Old 03-20-2013, 10:50 PM   #69
Vital-Rc
Free Agent
 
Vital-Rc's Avatar
 
Join Date: Oct 2010
Location: United States, KY, Glasgow
Posts: 1,190
Default

I prefer prop rip over turbines. Those things give me a head ache after about 5 mins.

ps : imastockmufflerflyer:
__________________
Vital-Rc is offline   Reply With Quote
Old 03-22-2013, 05:23 PM   #70
GeorgiaFlyer
Gettin' Lower!
 
Join Date: Jan 2012
Posts: 50
Default

Quote: Originally Posted by ken crane
View Post
one of the issues I have seen in the last 2 years is the 170s and 150s with stock mufflers. some of those are obnoxious. not complaining but its the truth. we had a couple of guys on the 3d line that were asked to finish the day and put those away until they were quieter. had nothing to do with prop rip.

but on the other hand if pat wants people to get quieter I know a great place for some of the quietest and smoothest running cans going...um www.planebenderproducts.com sorry couldn't resist.
Agreed these are great cans! I have them on a couple of my planes and love em.
GeorgiaFlyer is offline   Reply With Quote
Old 03-22-2013, 06:00 PM   #71
Josh Price
3DHS Trunk-Monkey
 
Josh Price's Avatar
 
Join Date: May 2006
Location: Arkansas
Age: 32
Posts: 4,251
Awards Showcase
Japaleno Bad Ass: This is to say thank you for donating  funds to help bring Wesse to the 09 Joe Nall! - Issue reason: Thank you so much! Wesse's Haaard Man Award!: For showing our community the joy of eating jap-a-lin-os and being a haaaard man! Wesse Power! - Issue reason: You are a haaaard man! Hard man video award! 
Total Awards: 2
Default

With out question pro flows are the way to go for cans. I have a set on a 170 and they work great and have a great throttle transition. Pro Flows for the WIN!
__________________
Team Futaba
Falcon Props
SmartFly
4Titude Rc,
Josh Price is offline   Reply With Quote
Old 03-22-2013, 06:04 PM   #72
Spats
Trolls need love too.
 
Spats's Avatar
 
Join Date: Sep 2012
Location: United States, CA, San Diego
Age: 49
Posts: 1,302
Default

Quote: Originally Posted by Josh Price
View Post
With out question pro flows are the way to go for cans. I have a set on a 170 and they work great and have a great throttle transition. Pro Flows for the WIN!
Hey Josh, what are you bringing to Nall? I am interested in checking out some of the 3DH stuff.
__________________
Officially nicknamed "Spats" by Planebender.
Spats is offline   Reply With Quote
Old 03-24-2013, 02:14 PM   #73
Josh Price
3DHS Trunk-Monkey
 
Josh Price's Avatar
 
Join Date: May 2006
Location: Arkansas
Age: 32
Posts: 4,251
Awards Showcase
Japaleno Bad Ass: This is to say thank you for donating  funds to help bring Wesse to the 09 Joe Nall! - Issue reason: Thank you so much! Wesse's Haaard Man Award!: For showing our community the joy of eating jap-a-lin-os and being a haaaard man! Wesse Power! - Issue reason: You are a haaaard man! Hard man video award! 
Total Awards: 2
Default

71 slick
89 slick
103 extra
120 lx
126 slick
and then the other guys will have about everything else you might want to see
__________________
Team Futaba
Falcon Props
SmartFly
4Titude Rc,
Josh Price is offline   Reply With Quote
Old 03-24-2013, 04:52 PM   #74
Spats
Trolls need love too.
 
Spats's Avatar
 
Join Date: Sep 2012
Location: United States, CA, San Diego
Age: 49
Posts: 1,302
Default

Quote: Originally Posted by Josh Price
View Post
71 slick
89 slick
103 extra
120 lx
126 slick
and then the other guys will have about everything else you might want to see

__________________
Officially nicknamed "Spats" by Planebender.
Spats is offline   Reply With Quote
Reply


Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools



All times are GMT -5. The time now is 05:42 AM.

All Flyinggiants.com content copyright 2006-2014 by RCGroups.com, LLC except where otherwise indicated. The Flyinggiants.com logo is a trademark of RCGroups.com, LLC.
Please report any misuse of our trademarks or copyright violations using the contact form.
RCGroups Network :: RCGroups :: The E Zone :: Lift Zone :: RC Power :: Crackroll :: RC Cars

Powered by vBulletin® Version 3.8.4
Copyright ©2000 - 2014, Jelsoft Enterprises Ltd.