Fun, Learning, Friendship and Mutual Respect
START  HERE


Unregistered
Go Back   HeliFreak > R/C Helicopter Support > Blade Helicopters (eFlite) > nano CP X


nano CP X Blade nano CP X Helicopters Information and Help


Reply
 
Thread Tools Display Modes
Old 12-07-2012, 04:19 PM   #1
NCcraig
Registered Users
 
Posts: 9,788
 

Join Date: Mar 2011
Location: North Carolina
Cool Interesting concept in the new Nano main blades.....

I got my new green main blades for Lynx today. They seem like well constructed blades. Flat out of the package and the color is vivid. First thing I noticed is that the root is just a bit large and binds up with the nut side of the feathering shaft. Nothing a bit of sandpaper didn't resolve. The thing that really stuck out is that the blades are not smooth. The have parallel ridges molded into them down the entire lenght of each blade. Never seen that before.

Click image for larger version

Name:	007.jpg
Views:	924
Size:	48.5 KB
ID:	372030

I'll have to wait until tomorrow to give them a spin. I'm curious to see how they fly.
__________________
Team Newb pilot
Trex 450 Pro V2 (KDE450XF motor,iKON), Witespy HT450 (In the process of a H frame swap), Blade 200QX with FPV set-up, DX9, AMA# 966513.
NCcraig is online now        Reply With Quote
Old 12-07-2012, 04:28 PM   #2
Gladiator
Registered Users
 
Posts: 1,453
 

Join Date: Aug 2011
Location: Miramar, FL
Default

Interesting... Thanks for sharing it!


Sent from my iPhone using Tapatalk
__________________
Goblin 700, T-Rex 700N, T-Rex 450
iKon, because I am connected to my heli, are you?
Gladiator is offline        Reply With Quote
Old 12-07-2012, 04:30 PM   #3
timox72
Registered Users
 
Posts: 376
 

Join Date: Dec 2011
Location: Spain, Las Palmas
Default

I guess you can comb your hair with that after a windy day at the flying field
timox72 is offline        Reply With Quote
Old 12-07-2012, 04:55 PM   #4
NCcraig
Registered Users
 
Posts: 9,788
Thread Starter Thread Starter
 

Join Date: Mar 2011
Location: North Carolina
Default

Quote:
Originally Posted by timox72 View Post
I guess you can comb your hair with that after a windy day at the flying field
If I had hair to comb!
__________________
Team Newb pilot
Trex 450 Pro V2 (KDE450XF motor,iKON), Witespy HT450 (In the process of a H frame swap), Blade 200QX with FPV set-up, DX9, AMA# 966513.
NCcraig is online now        Reply With Quote
Old 12-07-2012, 05:03 PM   #5
feralaero
Registered Users
 
Posts: 177
 
My HF Map location
Join Date: Jun 2012
Location: Savoy, IL
Default

I bet those will sound interesting!
__________________
Just one more model...
feralaero is offline        Reply With Quote
Old 12-07-2012, 07:43 PM   #6
AWDsylez
Registered Users
 

Join Date: Oct 2012
Location: CT
Default

Has anyone from Linx said why this was done? I wonder if it was for better performance or for noise reduction.
AWDsylez is offline        Reply With Quote
Old 12-07-2012, 08:02 PM   #7
asodestrom
Registered Users
 

Join Date: Dec 2011
Location: Santa Rosa, CA
Default

MSRX blades have a ridge on them.
asodestrom is offline        Reply With Quote
Old 12-07-2012, 08:28 PM   #8
TheMark
Registered Users
 
Posts: 1,532
 

Join Date: May 2012
Location: South Florida
Default

Reminds me of a school ruler, they prob have a very good reason
__________________

TheMark is offline        Reply With Quote
Old 12-07-2012, 09:04 PM   #9
edjo69
Registered Users
 
Posts: 363
 

Join Date: Aug 2011
Location: Fort Collins
Default

Just a guess, but I bet the ridges break up the air on the blade and create a sheet of smooth air that surrounds the blade.
__________________
MSRX, Nano CPx (2), 130X (5), 300X
DX8
ZX 1400
edjo69 is offline        Reply With Quote
Old 12-07-2012, 10:39 PM   #10
daneger21
Registered Users
 
Posts: 1,092
 

Join Date: Feb 2011
Location: Wooster, OH
Default

Quote:
Originally Posted by asodestrom View Post
MSRX blades have a ridge on them.
Look closer at the nano blades, teeny tiny ridges.
__________________
No I didn't misspell Daneger, my name is Dane..get it?
To view links or images in signatures your post count must be 0 or greater. You currently have 0 posts.

"Flyin' high again..." -Ozzy Osbourne

Last edited by daneger21; 12-08-2012 at 04:11 AM..
daneger21 is offline        Reply With Quote
Old 12-08-2012, 03:11 AM   #11
boofy
Registered Users
 

Join Date: Jul 2012
Location: australia
Default

looks like a wing profile. that should create lift just like a wing does. i think it speeds up the air going over the top of it creating the lift.
boofy is offline        Reply With Quote
Old 12-08-2012, 04:08 AM   #12
daneger21
Registered Users
 
Posts: 1,092
 

Join Date: Feb 2011
Location: Wooster, OH
Default

Quote:
Originally Posted by boofy View Post
looks like a wing profile. that should create lift just like a wing does. i think it speeds up the air going over the top of it creating the lift.
^^^Bernoulli Effect
Common, but doesnt explain the ridges
__________________
No I didn't misspell Daneger, my name is Dane..get it?
To view links or images in signatures your post count must be 0 or greater. You currently have 0 posts.

"Flyin' high again..." -Ozzy Osbourne
daneger21 is offline        Reply With Quote
Old 12-08-2012, 04:13 AM   #13
Rocketman777
Registered Users
 

Join Date: Sep 2009
Location: NY
Default

The ridges are most likely added for boundary layer control especially when the blades active higher angles of attack where laminar separation is prevalent. This will keep the air attached to the blade much longer and reduce the onset of suction drag and airflow separation while increasing lift over a larger range of AOA for a constant head speed. The concept is similar to the use of dimples on golf ball which achieves the same thing thus, reducing the "Magnus Effect".
Rocketman777 is offline        Reply With Quote
Old 12-08-2012, 04:53 AM   #14
daneger21
Registered Users
 
Posts: 1,092
 

Join Date: Feb 2011
Location: Wooster, OH
Default

__________________
No I didn't misspell Daneger, my name is Dane..get it?
To view links or images in signatures your post count must be 0 or greater. You currently have 0 posts.

"Flyin' high again..." -Ozzy Osbourne
daneger21 is offline        Reply With Quote
Old 12-08-2012, 07:18 AM   #15
tchilds
Registered Users
 

Join Date: May 2012
Location: Indy
Default

The ridges are there for same reason a golf ball has dimples. Laminar airflow.

By trapping a boundary layer of air against the blade it creates a foil shape in effect even though the blade is actually flat. It also allows the blade to glide through the air like its made out of air. Creating the foil shape with a tiny ridge instead of using twice as much material is pretty clever. A layer of air is always going to be lighter than adding a layer of plastic to achieve the shape of a foil.

That ridge creates a foil shape out of layers of air pressure, in short.

I got this from wiki:
For example, consider the flow of air over an aircraft wing. The boundary layer is a very thin sheet of air lying over the surface of the wing (and all other surfaces of the aircraft). Because air has viscosity, this layer of air tends to adhere to the wing. As the wing moves forward through the air, the boundary layer at first flows smoothly over the streamlined shape of the airfoil. Here the flow is called laminar and the boundary layer is a laminar layer. Prandtl applied the concept of the laminar boundary layer to airfoils in 1904.[6][7]
tchilds is offline        Reply With Quote
Old 12-08-2012, 07:59 AM   #16
superjet112x
Registered Users
 
Posts: 2,532
 

Join Date: Dec 2009
Location: Richland ,Wa
Default

The ridges are from the way they are made, Dylan explained it to me I have a set of Lynx blades on one of my mcpxs
__________________
Trex 700n DFC Beast x...Trex 600n Beast x...
Trex 450 pro V2 DFC Beastx KDE XFC Ice lite 50
MCPXs'' HPO7..HPO5s..CO5m..V2 stock..Nano Cpx
Blade 300x Phoenix 25esc Park BEC Blade upgrades
Ducati Desmo 1/5 scale nitro superbike
superjet112x is offline        Reply With Quote
Old 12-08-2012, 08:09 AM   #17
feralaero
Registered Users
 
Posts: 177
 
My HF Map location
Join Date: Jun 2012
Location: Savoy, IL
Default

Ridges designed for boundary layer control would run spanwise (perpendicular to the flow). These ridges are chordwise, so I doubt there is an aerodynamic purpose.
__________________
Just one more model...
feralaero is offline        Reply With Quote
Old 12-08-2012, 09:14 AM   #18
tchilds
Registered Users
 

Join Date: May 2012
Location: Indy
Default

Its totally a theory just saying there's a reason they didn't design that ridge OUT of the foil. Its either good or of no consequence. If it wasn't taken out and made them easier to manufacture or cheaper or more profitable then w/e that works too in theory from our side of things.
tchilds is offline        Reply With Quote
Old 12-08-2012, 09:19 AM   #19
feralaero
Registered Users
 
Posts: 177
 
My HF Map location
Join Date: Jun 2012
Location: Savoy, IL
Default

Quote:
Originally Posted by tchilds View Post
Its totally a theory just saying there's a reason they didn't design that ridge OUT of the foil. Its either good or of no consequence.
Are you talking about the ridge that runs the span of the blade, at about 1/4 chord? My guess would be that it's cheaper to manufacture than a nice, smooth airfoil. At this Reynolds number it's probably about as efficient.

I thought OP was referring to the many chordwise ridges, which look cool
__________________
Just one more model...
feralaero is offline        Reply With Quote
Old 12-08-2012, 10:10 AM   #20
BunkerLizard
Registered Users
 

Join Date: Aug 2012
Location: Chicago Area
Default

Does this mean I can use Ruffles potato chips on my nano. Those thongs have the best ridges!

Alright, alright... that stank. I'll go back to lurking.
BunkerLizard is offline        Reply With Quote
Reply




Unregistered
Go Back   HeliFreak > R/C Helicopter Support > Blade Helicopters (eFlite) > nano CP X


nano CP X Blade nano CP X Helicopters Information and Help

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump


Copyright © 2004-2011 - William James - Helifreak.com