RunRyder RC
WATCH |
2 pages [ << < ( 1 ) 2 NEXT >> ] 5467 views | Post Reply |
| RunRyder | RunRyder |
|
|
0| Dr.Ben
rrMaster Richmond, VA, USA |
So what do all those holes on my FZ-5, SZ-5, or SSZ-IV/V's mixers adjust???? Hi guys,Over the past months I've received quite a few PM's from folks who are wondering about head set up and what the mixers and so forth on our rotor heads adjust. This is espcecially true with the new SSZ-IV/V heads and the new FZ-5 (SDX) head because Hirobo provides a great baseline set up but little additional insight on what can be tweaked to accomplish a given goal. So.........I'm going to try to review a little of that stuff here.First, let's consider the holes on the flybar carrier. The closer you mount the ball to the center of the flybar carrier, the lower the bell hiller ratio. The model becomes more responsive and less stable in the wind with the ball mounted to the hole(s) closer to the center of the carrier. On the IV/V and SDX heads, you should undertstand that this is one way to adjust the flybar authority WITHOUT affecting collective or cyclic range. This point is important to understand because the design of these heads generally makes you trade off maximum stability for maximum collective and cyclic pitch range.Now, the bell mixers.....They have a bunch of holes in them. On the side of the mixer whose pushrod goes down to the swashplate, the further you go OUT (IOW mount the ball)on that mixer from its center pivot, the lower the collective and pitch range. In doing so, you'll also be increasing your bell hiller ratio and flybar authority. The opposite conditions will all hold true the closer you mount the ball to the mixer's center pivot. Now, let's jump to the other side of the mixer. On this side, the further OUT from the center pivot you mount that ball and link that go down to the flybar carrier, the lower the bell hiller ratio and flybar authority and you'll add to the collective and cyclic ranges. Conversely, if you go IN on this same side of the mixer, you'll accomplish the opposite effect. Again, these rotor heads lose collective and cyclic pitch range the higher you drive the flybar authority when the balls are moved about on the mixers.So, how the !@#$ do you figure out what settings to use? First, if you fly more of a contest style set up, The first thing I want you to do is flip the mixer around 180D so the pivot bolt goes through the opposite side of the mixer. Either remove the little standoff that goes through the bearings and put it in from the other side or put a thin shim washer between the mixer and the pitch arm. When you flip the mixer this way, it places the long arm of the mixer on the side going to the swashplate, which better optimizes your choices for stability. Oriented this way, the ball on the side of the mixer going down to the swash will go on the INSIDE of the mixer, and the ball on the flybar carrier side of the mixer wil go ont he OUTSIDE of the mixer. Here's a pic: http://www.runryder.com/rrpw.htm?p=4295025&i=26 (thanks Bob). You'll go all the way out on the swashplate side of the mixer and one hole out from all the way in on the carrier side of the mixer. Set up this way maximizes stabilty in the wind while preserving enough collective and cyclic range. You can't go all the way in on the carrier side of the mixer because you'll lose too much collective and cyclic range. As for the ball on the flybar carrier, you'll choose the hole either furthest out from the center or the intermediate option. Fine tweaking these mixing ratios for optimum stability in the wind is a topic for another dissertation.For those who fly 3D, the knee jerk reaction might be to max out the ball positions for the ultimate in collective and cyclic range. NOT!
The reason you don't want to do this is 1)You'll end up with so much collective you'll have to electronically compress the travel and thus torpedo resolution 2)Your cyclic travel may end up the same way making the model ridiculously touchy to fly, and thus you'll need to compress throw again 3)You make the model so unstable with little flybar authority that it no longer tracks through manuevers or a little puff of wind blows it all over the place. So..........the best thing to do is start with the suggested settings and fly the model. First, do you have the collective and cyclic range you desire without doing a bunch of funny business in the radio? Remember that with an eCCPM model, you'll want to try to keep the swash AFR's somewhere inthe 40-60's % range to preserve resolution and minimize control interaction. If the head set up is forcing you to really skew the radio numbers one way or the other, then move the balls around on the head to change the geometry and manipulate the collective and pitch range in whatever direction you need. A bit of philosophy here: I know the likes of Bobby Watts, Dominik, Nick Maxwell, etc. may fly a really hot set up. This fact does NOT mean you have to fly your model this way. YOU need to figure out exactly how much control range and authority you need for the kind of manuevers the YOU are doing. If need all the range and authority the head can provide for your style of flying, then that's just fine. BUT, if you're dialing the head back in the radio and otherwise feel as though you have a ball on the end of a needle in flight, then trade back some of the excess control for some flybar authority. The beauty of these new Hirobo heads is that they will pretty much do ANYTHING you want them do simply by moving the balls around in an informed manner and then playing with blades, paddles, and flybars. Thus please do yourself the favor of taking the time to adjust YOUR head to the way YOU want it fly. Your model will fly a lot better for your efforts.FWIW,Ben MinorRevision #1 4:30p EDT 6/17 Revision #2 2:15P EDT 6/18 |
| SHARE PM EMAIL GALLERY Attn:RR Quote | |
 TMoore
rrMaster Cookeville, TN |
The only ZERO flight hour certificate in the world. It's like getting a driver's license without the driver's test. |
| SHARE PM EMAIL HOMEPAGE GALLERY Attn:RR Quote | |
| Andy from Sandy
rrElite Veteran UK |
|
| SHARE PM EMAIL GALLERY Attn:RR Quote | |
| flyboy0413
rrApprentice Brookfield, CT |
|
| SHARE PM EMAIL GALLERY Attn:RR Quote | |
| RappyTappy
rrProfessor Encinitas, CA |
  for a moment! lol Nice post Dr.Ben, as usual.  |
| SHARE PM EMAIL GALLERY Attn:RR Quote | |
| shahar_lz
rrNovice Israel |
"On the side of the mixer whose pushrod goes down to the swashplate, the further you go OUT (IOW mount the ball)on that mixer from its center pivot, the greater the collective and pitch range" _____________________ May the Force be with You |
| SHARE PM EMAIL GALLERY Attn:RR Quote | |
| BarracudaHockey
rrMaster Jacksonville FL |
AMA 77227 http://www.jaxrc.com |
| SHARE PM EMAIL GALLERY Attn:RR Quote | |
| Dr.Ben
rrMaster Richmond, VA, USA |
|
| SHARE PM EMAIL GALLERY Attn:RR Quote | |
 AzHyper
rrKey Veteran Peoria, Az. |
|
| SHARE PM EMAIL Attn:RR Quote | |
| Piyaphan1
rrApprentice Bangkok, Thailand |
TurbulenceD3 YS-SR3C / TurbulenceD3 YS-SR3C-RR / Lepton |
| SHARE PM EMAIL GALLERY Attn:RR Quote | |
| Dr.Ben
rrMaster Richmond, VA, USA |
|
| SHARE PM EMAIL GALLERY Attn:RR Quote | |
| synodontis
rrKey Veteran United Kingdom |
|
| SHARE PM EMAIL GALLERY Attn:RR Quote | |
 2kwik2c
rrVeteran Chino Hills, USA |
|
| SHARE PM EMAIL GALLERY Attn:RR Quote | |
| rudyy
rrElite Veteran E. Amherst, NY |
|
| SHARE PM EMAIL GALLERY Attn:RR Quote | |
| rexxigpilot
rrProfessor rexxig2@comcast.net |
|
| SHARE PM EMAIL GALLERY Attn:RR Quote | |
| shahar_lz
rrNovice Israel |
the heli also felt more alive in the air and performed better 3D.I think you should all consider changing your basic settings and find out if you like it better.good luck all. _____________________ May the Force be with You |
| SHARE PM EMAIL GALLERY Attn:RR Quote | |
| Lewd Skywalker
rrApprentice Manila, Philippines |
 Thanks again. |
| SHARE PM EMAIL HOMEPAGE GALLERY Attn:RR Quote | |
| John Benario
rrVeteran Las Vegas |
|
| SHARE PM EMAIL GALLERY Attn:RR Quote | |
| rexxigpilot
rrProfessor rexxig2@comcast.net |
|
| SHARE PM EMAIL GALLERY Attn:RR Quote | |
| Quickster
rrVeteran Victoria, Australia |
|
| SHARE PM EMAIL GALLERY Attn:RR Quote | |
WATCH |
2 pages [ << < ( 1 ) 2 NEXT >> ] 5467 views | Post Reply |
| RunRyder | RunRyder |
|
|
Sunday, January 17 - 12:49 am - Copyright © 2000-2021 RunRyder EMAIL • Enable Cookies
