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Next-D › Build Question - Head Tight
04-01-2009 08:00 PM  9 years agoPost 1
mcs40

rrNovice

Singapore

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Hi all,

i've just started building my new Rave kit. 1 problem i encounter is that when the entire head unit is installed on the main shaft. The part when the washout base connects to the head block (via the 2 small shafts from the head block) seems very tight. This tightness is causing stiffness in movement for the entire head unit.

I took a file and slightly enlarge the 2 area on the washout base which connects to the 2 small shafts from the head block. The head is so much better now in terms of smoothness.

Is this an appropriate solution to this problem? Can someone help?

Btw before i did the filing, i have ensured no binding on the ball links and movement of the rest of the head unit is working good.

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04-01-2009 09:29 PM  9 years agoPost 2
Buzzin Brian

rrProfessor

College Station, Texas

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No, your pins were likely slightly bent. The filing will only cause slop.

Brian

Build it, fly it, crash it. Repeat as often as needed.

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04-03-2009 02:13 AM  9 years agoPost 3
mcs40

rrNovice

Singapore

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thanks for your help brian, what can i do to help in such cases of bent shaft?

I tried to straighten the shaft a little but it doesn't help, which is why i file the washout base.

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04-03-2009 04:16 AM  9 years agoPost 4
Buzzin Brian

rrProfessor

College Station, Texas

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It could be both or one of the pins comming out of the head block being slightly off for some reason. Its not something that would normally happen. Of course the pins could have been bent from any number of small things. Usually I can determine how they have twisted by lining them up right before they enguage the washout base. You can usually easilly tell which one does not quite line up. Usually a sligh tweak will make it work just fine. This is how I have done all helis in the past, however I have never needed to do this with any of the Raves I have built, and I have built a BUNCH of them.

Build it, fly it, crash it. Repeat as often as needed.

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04-03-2009 05:02 AM  9 years agoPost 5
mcs40

rrNovice

Singapore

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thanks for your help anyway, will try to maiden my Rave first and see how it flies. Maybe meanwhile will order a new washout base and head block to try out also.

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04-25-2009 06:23 PM  9 years agoPost 6
reiserrob2003

rrVeteran

Brockton, MA.

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before doing anything, try reversing the head block by 180 degrees, for some odd reason sometimes that is all it takes to get it moving easy.

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04-28-2009 06:36 AM  9 years agoPost 7
Buzzin Brian

rrProfessor

College Station, Texas

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That is a good tip. If the head block is damaged I will replace it. If you have figured out the issue just let me know.

Brian

Build it, fly it, crash it. Repeat as often as needed.

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04-28-2009 11:14 AM  9 years agoPost 8
mcs40

rrNovice

Singapore

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hi brian,

i have not figured out why my head block is so tight. I actually bought a used Rave head block and man that is so smooth as compared to mine. i'm happily flying my Rave with that now so haven't got a chance to try the earlier suggestion of turning the block 180 degrees. i will probably do that and report back

but thanks for your offer and help

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