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Finless Bob's Helifreak Tech Room Finless Bob's Helifreak Tech Room - Tips and how-To Videos


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Old 07-10-2006, 08:24 PM   #121 (permalink)
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Quote:
Originally Posted by jocatch
Putting the tail together on the XL and I don't notice any secure way to attach the boom. It looks like it just slides into the frame. Is that it? After the belt tension is set, isn't there a way to lock the boom in place? I can see where it would be a friction fit as I need alot of force to slide it in. Maybe I suppose to loosen up the frame screws in that area first?

Joe C
P.S. Sure could use a video on this! I have another question on the pitch setting on the tail rotor. Moving the linkage that sets the pitch has a resistance spot as the blades approach 0 degrees. And the fork unit (tail rotor control arm) is not centered on the shaft but offset toward the hub when the blades are flat (zero degrees). I don't see any thing wrong so I am thinking this is normal?
You need to leave the screws holding the links on the pitch slider plate a tad loose and thet will get rid of the binding at zero pitch.

Yes you need to loosen the 4 screws at the rear of the frame to put the boom in. Then tighten them to keep the boom from sliding..... If it slides with the screws tight just put a wrap of clear tape around the boom and the frame will then clamp it properly.

bob
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Old 07-10-2006, 08:25 PM   #122 (permalink)
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Quote:
Originally Posted by Raven_darkcloud
Hay bob, I'm puting an align head onto my x400 and wanted to know if the setup Im going to do will be best for solid controll and dampining. I plan on useing cnc swahs, washsout, mixer arms, cage, headblock, andgrips. I plan on staying with plastic on the seesaw itself to dampen the flybar. Am I correct that this will be better way to go? I want to have a solid head and reduce vibs. Your vids have helped me on so many helis not just trex.
Shuld be fine. The only metal parts that really improve performace are the
Head with washout block and metal swash as the plastic still can come apart. The rest is really bling and crash resistance. Actually you might want to go metal ont he seesaw box and cage as that alwasy seems to break in a crash.

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Old 07-11-2006, 12:33 AM   #123 (permalink)
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Ok thanks bob.
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Old 07-14-2006, 09:34 PM   #124 (permalink)
 

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Hello Bob and everyone. Still having a problem with assembling the tail rotor on my 450XL. When I have the linkage control arm perpendicular to the boom, the control bushing is not centered on the tail rotor shaft but the blades look like zero pitch. There is alot more deflection one way (towards the boom) than the away. To make this clear, I uploaded a video to my web site and I was hoping you guys could look at it and tell me whats wrong. I know the serov is overdriving the control arm in one direction, I haven't set the end points yet. Thanks.

The video is at http://www.joecool.org/rotor.wmv

Joe C.
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Old 07-14-2006, 10:07 PM   #125 (permalink)
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Center your servo with the transmitter, then slide it on the boom back and forth until the linkage is centered the way you want it. You could also adjust the ball links if they have enough travel and that is easier.
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Old 07-17-2006, 09:31 AM   #126 (permalink)
 

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OK, but my question is, with center stick, shouldn't the tail blades have x degress of pitch and if so, how much? Should I adjust so the bushing is centered on the rotor shaft or the control arm perpendicular to the boom (how it is now)?

Joe C.
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Old 07-17-2006, 09:03 PM   #127 (permalink)
 

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I read a thread that said the tail should be 8 degrees with the servo centered. It said it takes about that in hover so that's how I set mine and it works perfectly. When I am in hover and the gyro is holding, the servo is fairly centered.
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Old 07-17-2006, 09:12 PM   #128 (permalink)
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With digital servos etc... that really doesnt matter unless you plan to fly in rate mode. But I argue even still that now the servo now moves farther in one direction than the other to get full movement of the pitch slider. That is worse in my opionion than not having the servo center at hover..... 3D pilots are rarely at center on the rudder anyway.

Bob
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Old 07-18-2006, 08:48 PM   #129 (permalink)
 

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So basicly you're saying the servo should be centered to the center of the slider?
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Old 07-18-2006, 09:14 PM   #130 (permalink)
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YEP.... no reason not too!
The idea of having a servo centered in hover is a OLD idea based on technologies of older gyros.....

Try it and tell me otherwise...... I am always OPEN to ideas.

Bob
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Old 07-20-2006, 11:27 PM   #131 (permalink)
 

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Been off for a couple days, but that icon is just plain freaky
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Old 07-20-2006, 11:28 PM   #132 (permalink)
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Old 07-21-2006, 10:31 PM   #133 (permalink)
 

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Now that one I like, is it one of your's?
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Old 07-21-2006, 11:26 PM   #134 (permalink)
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Yep... a pic of my own bird going inverted!

Bob
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Old 07-25-2006, 03:20 PM   #135 (permalink)
 
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Hey guys,

I am a regular Run Ryder member and I thought I'd show my face here too.

Thanks for the top quality vids bob!

Really helpful!!
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Old 07-27-2006, 02:18 AM   #136 (permalink)
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Welcome aboard Plane Hazza!
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Old 07-27-2006, 12:13 PM   #137 (permalink)
 
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Cheers for the welcome BarnOwl!!

Im looking forward to joining this community :glasses:

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Old 08-20-2006, 08:10 PM   #138 (permalink)
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Hi all.
I'm a brand new heli owner in Australia and have been looking everywhere on the 'net for some good, practical assembly advice for the T-Rex 450 and I've finally found it here!!! There doesn't seem to be much around concerning practical advice for heli assembly in Australia, so I'm ecstatic that I found HeliFreak.com and Bob's videos! I've been really stuck on a couple of things and I wish that I'd had these videos when I first started assembling the heli a couple of days ago. They would have reduced much of the uncertainty that I had as a noob.

Great stuff Bob (& HeliFreak). There are some fantastic resources here - the videos are outstanding for noobs like myself.

Cheers,
Gary
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Old 08-20-2006, 08:15 PM   #139 (permalink)
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Gary,

Good news, there is a vibrant and very helpful local RC heli community in Australia, including some very active folk up on the Gold Coast.

Take a look at www.archeli.com.au, it too is a great resource with the benefit that the information is all local.
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Old 08-20-2006, 08:22 PM   #140 (permalink)
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Thanks Kenneth. I joined the archeli forum last week but haven't been able to find what I was looking for re. 450XL assembly. I know the videos here are for the HDE but they're a great resource to start with. But thanks anyway - nice to see another Aussie on a US forum!

I'm really looking forward to being involved with the r/c heli community.

Cheers
Gary
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