RunRyder RC
WATCH
 1 page 686 views POST REPLY
HomeAircraftHelicopterHelicopter Main Discussion › FBL 4 bladed heads for 3D
01-18-2010 01:11 AM  8 years agoPost 1
Yug

rrMaster

UK. Herts

My Posts: All  Forum  Topic

This is an idea I have recently been toying with respect to 3D applications. Ofcourse everyone is more than familliar with the standard 2 blade configuration as it represents the simplest setup. A few have also experimented with single bladed heads with a counterweight.
However, I have been wondering about the implementation of say a 4 or 5 bladed head for use in a 3D flight profile. Given that the abruptness of required inputs would result in lower vibes on the airframe, it follows that the triple axis gyros would require less damping allowing a faster response time, resulting in quicker dead-stop manouvers.
However, I have never worked with a heli with anything more than 2 blades. Given the tradeoff of moveable aitr-mass with HS versus a smaller radiussed disc, do you think that an FBL 4 blade head would offer an improved flight profile ?

Vegetable rights and Peace

PM  EMAIL  GALLERY  Attn:RR  Quote
01-18-2010 01:18 AM  8 years agoPost 2
Rotowerkz

rrApprentice

Windham, NH

My Posts: All  Forum  Topic

I think the additional mass of two more blades may slow cyclic response somewhat. You can overcome this by changing the hiller mixing ratios on some heli models and putting in higher-torque, faster servos. However, the increased spinning mass is going to create some measure of stability that must be overcome.

PM  EMAIL  GALLERY  Attn:RR  Quote
01-18-2010 01:20 AM  8 years agoPost 3
colsy

rrElite Veteran

Cambridge, UK

My Posts: All  Forum  Topic

aitr-mass
Could you, maybe 'splutter' some detail here!!

col.

Only Quote From Experience.

PM  EMAIL  HOMEPAGE  GALLERY  Attn:RR  Quote
01-18-2010 01:26 AM  8 years agoPost 4
Yug

rrMaster

UK. Herts

My Posts: All  Forum  Topic

"aitr mass" - dodgey keyboard after I spilled wine on it laast night.
Good point on the spinning mass aand the ability for servos to overcome the gyroscopic forces.

Vegetable rights and Peace

PM  EMAIL  GALLERY  Attn:RR  Quote
WATCH
 1 page 686 views POST REPLY
HomeAircraftHelicopterHelicopter Main Discussion › FBL 4 bladed heads for 3D
 Print TOPIC  Make Suggestion 

 3  Topic Subscribe

Wednesday, September 26 - 6:23 am - Copyright © 2000-2018 RunRyder   EMAILEnable Cookies

The RC discussion world needs to consolidate. RR is now one choice for that. Its software is cutting edge. It hosts on-topic advertising. Help RR increase traffic buy making suggestions, posting in RR's new areas (sites) and by spreading the word.

The RunRyder Difference

• Category system to allow Rep/Vendor postings.
• Classifieds with sold (hidden) category.
• Classifieds with separate view new.
• Answer PMs offsite via email reply.
• Member gallery photos with advanced scripting.
• Gallery photo viewer integrated into postings.
• Highly refined search with advanced back end.
• Hosts its own high end fast response servers.
• Hosts thousands of HD event coverage videos.
• Rewrote entire code base with latest technology.
• No off-topic (annoying) click bait advertising.
Login Here
 New Subscriptions 
 Buddies Online