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HomeAircraftHelicopterHIROBOHirobo Turbulence › Frustrated !!!!
08-04-2009 01:29 PM  8 years agoPost 21
J2M

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UK

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Thanks

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08-05-2009 12:17 PM  8 years agoPost 22
MJG

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Planet Earth

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I suggest a quick check of your flybar. Pop it out and roll it to check it's straight. With the new very short flybar cage on the SSZ-IV and V head's it's very easy for the flybar to take a little knock and bend. I know because it happened to me and it caused vibes which were only visible during hovering.

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08-07-2009 03:12 PM  8 years agoPost 23
mrrc

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Huntingdon Valley, PA

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Here is how i did it also my new muffler

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08-07-2009 03:43 PM  8 years agoPost 24
John Benario

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Las Vegas

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MRRC, that installation is very elegant looking, but the boom struts are still cantilevered, now on the landing gear bolts. You may want to move them to the upper side so that they are resting on the blue piece which will put the load on the bolts in shear, not in bending.

John Benario

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08-07-2009 04:02 PM  8 years agoPost 25
mrrc

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Huntingdon Valley, PA

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I had them up on top and they broke at the last funfly 1 of the mrc reps had it this way and it does work good just got the Quick UK supports so they will go on tonight

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08-10-2009 06:07 PM  8 years agoPost 26
John Benario

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Las Vegas

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To all who have had bolts break, it would be interesting to find out the balancing practices.

My helicopters are perfectly smooth, and since I put the boom struts on the landing gear plate there have been no issues. I don't assume that anything is balanced, and my assumption is correct every time.

I balance the:

fan
main gear
flybar
main blades on the head
tail rotor hub vertically and horizontally
tail blades on the (previously balanced) tail hub
engine (I realize this last one is unavailable for most people)

John Benario

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08-16-2009 02:53 PM  8 years agoPost 27
Elgreco

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Montreal,QC-Canada

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How do you guys balance the blades chord wise ? Anyone could explain ?

I ordered a hi point balancer so I can do all my heads from now on, and I am going through the list of things to balance and I was wondering about the blades in that way..

Trex 550 V-BAR, Trex 700 V-BAR, N5-os55VBAR, TREX700E V-BAR /X9503

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08-16-2009 04:44 PM  8 years agoPost 28
jpn

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Cebu, Philippines

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Also if you overspeed the head too much i think bolts will also tend to break due to the hi frequency vibrations...

test pilot - Lil's Hobby Center (Hirobo & Futaba Philippine distributor)

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08-16-2009 07:40 PM  8 years agoPost 29
rexxigpilot

rrProfessor

Florida

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I doubt the bolts will break! They may go into plastic deformation or exceed yield strength, but they won't break or exceed ultimate tensile strength.

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08-17-2009 02:28 AM  8 years agoPost 30
Dr.Ben

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Richmond, VA, USA

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The vast majority of blades are OK chordwise CG. The Koll Rotorpro can check for such errors. I'm more interested in knowing if one blade is out of whack compared to the other. If it's a serious difference, it's a warranty issue because correcting big chrodwise CG problems isn't easy. You end up having to add sig. amounts of lead to blade to shift the CG, and that plays into the overall blade balance.

Ben Minor

Peak Aircraft/Team Minicopter Team Futaba Team Kontronik USA

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08-18-2009 12:57 PM  8 years agoPost 31
John Benario

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Las Vegas

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El Greco - If you are interested, and you come to the conclusion that building properly is the most important aspect of progressing in the hobby, I do offer a building school.

It is not cheap, but getting 30 years of experience in a day or two will save you many, many dollars over the years. If you have vacation and you can come to Atlanta you will be absolutely amazed at the difference between an ok built model and a perfectly built model.

John Benario

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HomeAircraftHelicopterHIROBOHirobo Turbulence › Frustrated !!!!
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