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Old 05-26-2012, 10:24 AM   #1
Lompma
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Question Where to mount Beastx unit on Plastic kit

Just wondering where people are mounting their FBL units on the plastic kits. It does not look like the right angle under the bearing blocks. I was thinking the bottom of the boom block to protect it from blade strikes. I had to sand it a little to get it flat. Any suggestions?
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Old 05-26-2012, 10:40 AM   #2
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Mine isn't the plastic but I put mine in the "traditional" gyro location.


Prôtos 500CF FBL Vbar
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Old 05-26-2012, 11:09 AM   #3
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Top of boom block in the traditional position


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Old 05-26-2012, 11:13 AM   #4
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Top of boom block is where I mounted mine.
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Old 05-26-2012, 12:14 PM   #5
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Did anyone sand it flat. I took a metal carpenter square to it and it has quite a hump in the middle.
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Old 05-26-2012, 01:12 PM   #6
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Quote:
Originally Posted by Lompma View Post
Did anyone sand it flat. I took a metal carpenter square to it and it has quite a hump in the middle.
What I did was cut the mounting tape (3M gray) into two narrow strips and put them on each side of the hump so that the bottom of the BeastX does not touch the hump. You might need two layers.
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Old 05-26-2012, 01:40 PM   #7
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I have mine under the main shaft - I made up a 2.5 degree wedge to make it flat
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Old 05-26-2012, 03:00 PM   #8
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Hi !

I have mine mounted on the traditional gyro plattform, too. It works really fine this way !

Greetings,
Oliver
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Old 05-26-2012, 03:40 PM   #9
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Quote:
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I have mine under the main shaft - I made up a 2.5 degree wedge to make it flat
I recently had a bad crash and if i would have had the beastx under the main shaft it would have been destroyed completely due to the main shaft penetrating through the beast.

Just a heads up

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Old 05-26-2012, 03:42 PM   #10
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Thanks - I know it's a risk - but this is a $30 Copterx that is in an aluminium case so hopefully safe and if not it is at least cheap
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Old 05-26-2012, 03:51 PM   #11
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I have been thinking about getting a sk720 or sk540 since a while now.
Skookum advises to install it somewhere around cg. That's why I'm not sure about it...

I have the "same problem" with the LOGOs. Perhaps I would go for one but in these birds the battery is installed under the main shaft and could easyly destroyed in case of a crash...

I would go for the traditional place.

Greetings,
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Old 05-27-2012, 07:54 PM   #12
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Quote:
Originally Posted by DaveGahan View Post
I have been thinking about getting a sk720 or sk540 since a while now.
Skookum advises to install it somewhere around cg. That's why I'm not sure about it...

I have the "same problem" with the LOGOs. Perhaps I would go for one but in these birds the battery is installed under the main shaft and could easyly destroyed in case of a crash...

I would go for the traditional place.

Greetings,
Oliver
The SK720 will work perfectly on the boom block (it does on my mini) the CoG advise is because vibrations are lower there but the protos design has low vibrations anyway (unlike a TT with transmission gears under the tail block). If you ignore vibrations you can mount the unit pretty much anywhere, as long as you can get it perpendicular to the mainshaft, neither rotational velocity or linear acceleration are altered by position on a rigid body (which the heli is to all intents).

The 540 can be mounted anywhere, it has negligible vibration sensitivity
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Old 12-29-2012, 10:19 PM   #13
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Quote:
Originally Posted by banditpowdercoat View Post
Top of boom block in the traditional position
I did this but a crash that required a boom change caused me to rethink this location because splitting the block required removing the AR7200BX :-( I had moved it to the slanted portion under the boom, but I'm thinking a slant is bad for the BX. And I see someone created an angled mounting adapter to keep it horizontal below the main gear. Thoughts?
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Old 12-29-2012, 10:27 PM   #14
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Quote:
Originally Posted by matthewcornell View Post
I did this but a crash that required a boom change caused me to rethink this location because splitting the block required removing the AR7200BX :-( I had moved it to the slanted portion under the boom, but I'm thinking a slant is bad for the BX. And I see someone created an angled mounting adapter to keep it horizontal below the main gear. Thoughts?
You don;t have to split the cases for a boom change. Remove bolts and block slides out. I've done it with BX in place. Amd yes if you mount on the lower flat under the main shaft you NEED a angle to make the BX exactly perpendicular to the mainshaft
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Old 12-29-2012, 10:51 PM   #15
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Thanks, but I'm confused about how to get the boom out without separating the two halves. There is a round pin/extrusion inside one (both?) half that keeps the boom in place.
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Old 12-29-2012, 11:13 PM   #16
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Quote:
Originally Posted by matthewcornell View Post
Thanks, but I'm confused about how to get the boom out without separating the two halves. There is a round pin/extrusion inside one (both?) half that keeps the boom in place.
Ut-OH read this thread on the which end is which...

http://www.helifreak.com/showthread.php?t=461526

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Old 12-29-2012, 11:19 PM   #17
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Need to mount gyros/fbl. In traditional location on boom. Frame geometry of plastic kit is not 90* to main shaft. For cf frame there is optional upgrade lower frame section.
As far as splitting boom support for boom change, the hole is at tail box and slot is at boom block. Loosen 4 bolts and 2 screws to slide boom out. You can mount fbl unit on bottom of boom block. To help in blade strike. My fbl brains are mounted under boom.
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Old 12-29-2012, 11:52 PM   #18
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That explains it! Note that the manual is dead wrong (see attached pic), as discussed in the very helpfully-linked to thread. Guess it is time to take her apart again. It will be nice to try flying it someday :-|
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Old 12-30-2012, 01:12 AM   #19
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Im with you! I have yet to fly my own but im waiting on batts and charger. You will get there and youre in the right place for information. Just stick with it ....



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Old 01-01-2013, 05:49 PM   #20
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My BeastX has been on the inside of the frame of my plastic kit for over a year and it flies great.

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