Fun, Learning, Friendship and Mutual Respect
START  HERE


Unregistered
Go Back   HeliFreak > R/C Helicopters > Rotor Blades


Rotor Blades R/C Helicopter Rotor Blade Discussions


Reply
 
Thread Tools Display Modes
Old 09-10-2011, 04:12 PM   #1
Dongskie
Registered Users
 
Posts: 19
 

Join Date: Aug 2011
Location: Mandaluyong City, Philippines
Default 315mm Vs. 325mm Main Blades on a 450

315mm vs. 325mm Fiber Glass main blades on 450 Heli

I used to have a Belt CP heli and have 3 pairs of blades for it, when I sold it I got to keep the spare 2 pairs which the new owner didn;t want to keep.

Lately I got an HK450 ver2 and out of curiousity used the 315mm main blades on it.

I was suprised to expereince a different handling characteristic and crisp response form the heli which I did not experience with the 325mm blades.Both 315mm and 325mm blades are made of fiber glass.

Using the 315mm blades it spooled faster, got crisp cyclic response and faster transition. I also felt that the heli moved faster from point A to point B and at a lesser cyclic input. I prefer to use this from now on

I am baffled by the result but was extremely happy about it. I've always thought that a shorter main blade will give it lesser responsiveness and performance.

Anyone can explain the physics of it, I am all eyes

Thanks guys!

Ed
__________________
ESKY BIG LAMA - ESKY BELT CP CARBON EDITION - HK500GT - DYNAM T-28 TROJAN
Dongskie is offline        Reply With Quote
Old 09-16-2011, 12:53 PM   #2
chopstick
Registered Users
 
Posts: 787
 

Join Date: Jul 2008
Location: the Netherlands
Default

I have flown 315mm blades on my 450. These behaved like you said. IMHO you can use them without any problem.
__________________
LOGO 400SE : Stretchd to LOGO 10 size :
Spartan Vortex Nano; Scorpion 3226 1230kV
SJM180 : Skookum SK540
Rigidheli.com: The place where Dutch Helipilots meet
chopstick is offline        Reply With Quote
Old 09-25-2011, 11:28 AM   #3
Digger1973
Registered Users
 

Join Date: Aug 2010
Location: Cumberland County, NS, Canada
Default

Mini Titans come with 315 mm blades. If that is of any help. No reason why they wouldn't worlk well
Digger1973 is online now        Reply With Quote
Old 09-25-2011, 04:48 PM   #4
Dongskie
Registered Users
 
Posts: 19
Thread Starter Thread Starter
 

Join Date: Aug 2011
Location: Mandaluyong City, Philippines
Default

Thanks guys!!
__________________
ESKY BIG LAMA - ESKY BELT CP CARBON EDITION - HK500GT - DYNAM T-28 TROJAN
Dongskie is offline        Reply With Quote
Old 09-30-2011, 05:39 AM   #5
kouasupra
Registered Users
 
Posts: 3,855
 

Join Date: Aug 2010
Location: Fresno, CA
Default

315mm will give you more flight time, but you aren't going to be able to get more hang time in maneuvers. 315mm also don't auto as well. 325mm creates more lift making it easier for tic tocking, and auto'ing. Both blades has their pros and cons, and are use for different flying style. Only you can determine what you like.
kouasupra is offline        Reply With Quote
Old 09-30-2011, 01:52 PM   #6
Dongskie
Registered Users
 
Posts: 19
Thread Starter Thread Starter
 

Join Date: Aug 2011
Location: Mandaluyong City, Philippines
Default

Thanks kouasupra:

I really wanted more flight time, I am no 3d flyer anyway.
__________________
ESKY BIG LAMA - ESKY BELT CP CARBON EDITION - HK500GT - DYNAM T-28 TROJAN
Dongskie is offline        Reply With Quote
Old 12-15-2011, 09:10 PM   #7
TexasC
Registered Users
 
Posts: 505
 

Join Date: Nov 2011
Location: Houston, Texas USA
Default

the 315 mm blades are shorter therefore the center of gravity is closer to the center of the head. This results in less torque and since the blades probably weigh slightly less than the 325 mm ones, there's less sprung weight.
All this means is that the motor can spin the blades faster and easier making your heli feel more agile.
TexasC is offline        Reply With Quote
Old 12-24-2011, 10:21 AM   #8
satgod
Registered Users
 
Posts: 4,697
 
My HF Map location
Join Date: Apr 2011
Location: USA,KY,Rineyville
Default

because of the slightly shorter blades your headspeed can be slightly higher which is a good thing and you wont loose power as much in high collective moves
__________________
Rush 750/stretched V-bar KDE 700XF-495 HV servos Greys reactor CC 160-HV
Trex 600EFL V2 V-Bar ds610 ds650 CC bec/pro Scorpion 130a HV KDE 600XF-530
450L KDE 1750 cc50 4xDS215MG k-bar
X-8 FPV Wing, TBS Discovery FPV, TBS Caipirinha FPV
satgod is offline        Reply With Quote
Old 12-24-2011, 07:50 PM   #9
crf69
Registered Users
 
Posts: 5,010
 
My HF Map location
Join Date: Aug 2011
Location: COLDHIO
Default

i went from 335 to 325 and noticed a mega difference on Walkera V450D01

may try 315
__________________
Ryan Robinson.

To view links or images in signatures your post count must be 0 or greater. You currently have 0 posts.
crf69 is offline        Reply With Quote
Reply




Unregistered
Go Back   HeliFreak > R/C Helicopters > Rotor Blades


Rotor Blades R/C Helicopter Rotor Blade Discussions

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