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Big lama battery compartment - minor modification.


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platinum
Extreme 3D
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Joined: 31 May 2011
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Location: Bangkok Thailand

PostPosted: Sun Jun 12, 2011 10:00 am
PostPost subject: Big lama battery compartment - minor modification.
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Many big lama owners were unsatisfied with the battery security it fell out while flying so do I.
We can use velcro tape to hold but I also want to use my stock 950 mAh batteries which a little bit thicker too.
So I added 4 thin washers to the skid mouting.

platinum
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/Goal : relaxed flying with the least fixing.



It snug fit for 950 mAh battery.



Use wooden sheet shim for original 800 mAh battery.



Last edited by platinum on Sat Jun 25, 2011 8:53 pm; edited 1 time in total
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pjdog
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Joined: 12 Jan 2010
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Location: Hudson, Florida, USA

PostPosted: Sun Jun 12, 2011 7:45 pm
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I had a Big lama. The battery fell out while flying. So I bought a set of 'Super Skids' with the optional battery tray. Solved the problem.

Jack
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tombo242
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Location: Santo Estêvão, East Algarve, Portugal. Now 82, but still feels 22.

PostPosted: Sun Jun 12, 2011 7:52 pm
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Of course you can just strap a big battery to a velcro pad underneath the normal box. Check the CG though and this vid of mine.

Link


Yup - that's me and "Big Jock" too!

Tom.
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pjdog
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PostPosted: Sun Jun 12, 2011 10:44 pm
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Nice Lama.

Looks like a killer.
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platinum
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PostPosted: Mon Jun 13, 2011 5:45 am
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Nice video. Let's know about that. Thanks for sharing.

platinum
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tombo242
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PostPosted: Tue Jun 14, 2011 3:37 am
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platinum wrote:
Nice video. Let's know about that. Thanks for sharing.


Just make a thin plasic recangle to fit above the skids use a velcro hook pad for the battery and a strap to secure it. As in this pic:-



I also have a few special settings in the DX6i Tx/Orange Rx to help keep down blade strikes. Outdoor hover is much like my Blade 400 indoor; you have seen.

Tom.
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platinum
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PostPosted: Tue Jun 14, 2011 7:53 pm
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tombo242 wrote:

I also have a few special settings in the DX6i Tx/Orange Rx to help keep down blade strikes.
Outdoor hover is much like my Blade 400 indoor; you have seen.
.


Thanks for your information.
I interest in how to set the Tx/Rx to keep down the blade strikes(the fundermental knowledge).
Even I use different Tx/Rx it may apply or get any idea.

platinum
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tombo242
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PostPosted: Tue Jun 14, 2011 9:47 pm
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platinum wrote:
Thanks for your information.
I interest in how to set the Tx/Rx to keep down the blade strikes(the fundermental knowledge).
Even I use different Tx/Rx it may apply or get any idea.


Hi platinum

This is the set up for using the DX6i with a DSM" compatible Rx in it.

This is the use of dual rates and expo for flight.

Sorry, but they are only in English. Sad

Tom.
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platinum
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PostPosted: Wed Jun 15, 2011 5:58 am
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Hi Tom,
Thank so much for your superb illustration . ...(A Tombo production).
Have a good time.

platinum
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tombo242
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PostPosted: Wed Jun 15, 2011 5:01 pm
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platinum wrote:
Thank so much for your superb illustration . ...(A Tombo production).


You're very welcome platinum.

Tom.
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St Bosse
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PostPosted: Wed Sep 07, 2011 2:00 pm
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Hi tombo242,

Sorry for this late posting but I only started heli flying a week or three ago and only came past your posting today.

Nice video!

Question:- Are you using the standard stock motors? Lots are written about conversion to brush-less. Being aware of a possible nasty temp cut-out, I continuously check my motor temperature. So far even after a 10 min flight, quite acceptable temp. And secondly, the cost doesn't really justify the conversion. (The BL costs about $90 more here in South Africa!). I would rather put the money towards the next level, i.e. CP type of heli.

What I did notice though after a nasty unexplainable crash, while checking the motors and electrics, was that the one motor in its unmounted state was screaming a lot. (My BL is still very young in run time). I then realized that the advice I'm getting about the signs on when the motors are nearing end-of-life, being funny noises actually points to the fact that one should service the motors periodically by oiling the two end bushes with a tiny drop of thin oil. Apparently they pack up due to bush(bearing) failure.
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pjdog
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PostPosted: Wed Sep 07, 2011 7:51 pm
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St Bosse:

I found that the motors failed at the bearing gear end. That's the end I oiled. Oiling the brush end will cause you trouble. The oil will set up a resistance on the commutator and that will generate more heat and that will reduce the life of the motors. I know this from experience. I had to replace the motors twice in my Big Lama.

If you do oil the brushed end of your motors just a smidgen of oil. then wipe up right away.

Jack
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St Bosse
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PostPosted: Wed Sep 07, 2011 8:25 pm
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Jack,

I agree. I was also worried about oil on the brush side but did exactly as per your recommendation. The opposite side (gear side), is where all the stresses and side torques on the shaft been happening. I think that oil on this side need also be a tiny little drop periodically and NOT one big drop until it's noisy again. Oil might creep through to the brushes.

Thanks for the response.
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pjdog
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PostPosted: Wed Sep 07, 2011 11:31 pm
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St Bosse:

Every motor I lost on the Big Lama was down on the pinion gear end. The bearing just crapped out. Even with oil before every flight. This would be a great canidate for a ball bearing replacement. Those stock oil lite bearings just can't take it.

Jack
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tombo242
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PostPosted: Thu Sep 08, 2011 7:40 pm
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St Bosse wrote:
Question:- Are you using the standard stock motors? Lots are written about conversion to brush-less. Being aware of a possible nasty temp cut-out, I continuously check my motor temperature.


Hi St Bosse,

Not brushless, I consider that the extra electronics are too much trouble for a nice easy-going flyer like the B.L. However, I am running the ball bearing brushed motors. Straight replacement, everything lines up with no problems. I recommend that you either photograph the connections or make good notes BEFORE disconnecting any wires. It s all too easy to plug the motors into the wrong sockets or the wrong way up.

Here's a good start for you. Ebay and well worth the price.

Tom.
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