Unleash the Kraken - Page 3 - RC Groups
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Dec 05, 2015, 05:58 AM
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Dec 06, 2015, 02:29 AM
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Kraken Art


Spotted some great street art today.

Last edited by boltrc; Dec 06, 2015 at 03:46 AM.
Dec 06, 2015, 02:34 AM
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RaymondM's Avatar
All right now to get it in the air.
Looks a little unruly to be honest! lol

Flying Kraken!



just had to.
Last edited by RaymondM; Dec 06, 2015 at 02:41 AM.
Dec 06, 2015, 03:04 AM
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Yep, yours looks a lot more terrifying to be honest.

We have some cool imagery for merch coming through soon which will be available locally around the world on T shirts etc. The first mock-ups look great. I will check with the artist next week, but should be ready in the next couple of weeks.
Dec 06, 2015, 03:09 AM
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@raymond - BTW, how do you embed the image. I always need to attach?
Dec 06, 2015, 03:18 AM
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RaymondM's Avatar
I use Photobucket.
I upload the pic and it translates it to different choices (code) that can inserted into the receiving media . ie...E-Mail and IM, Direct, HTML, IMG for this media at RCGroups use the IMG code generated. Then just copy and paste in the message box here at RCGroups. easy peasy.

http://s1308.photobucket.com/
Dec 06, 2015, 03:19 AM
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RaymondM's Avatar
Quote:
Originally Posted by boltrc
Yep, yours looks a lot more terrifying to be honest.

We have some cool imagery for merch coming through soon which will be available locally around the world on T shirts etc. The first mock-ups look great. I will check with the artist next week, but should be ready in the next couple of weeks.
Awesome bro! Congrats. Be sure to post your swag here as we will all want a look.

BTW any hint' as to the price of this frame that you can release or is it still tba?

Oh yeah one thing about Photobucket, it will bother you with ads you can pay like .99 cents a month to have them removed , they are so annoying, I did.
Last edited by RaymondM; Dec 06, 2015 at 03:27 AM.
Dec 06, 2015, 03:32 AM
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A follow on from this earlier post, in this second simulation we model the same arm but with 4mm thick CF.

By increasing the arm thickness, we have increased the weight of the quad by ~16 grams (+33% of the arm weight) or 4gms per arm .

We have however increased the strength of the arm by a little more than this.

This incremental weight of this 2cmx1.8cmx1mm section is ~0.5 grams for this high stress area but comes with a penalty 8 times!



Quote:
Originally Posted by boltrc
The picture below depicts the simulated stress of 20 newtons of force applied to the flat side of the motor mount of a quad arm. The arm simulated is a typical H quad 6in arm anchored by two bottom plates. The arm is 18mm wide and 3mm thick with no feathering at the root.

......
Last edited by boltrc; Dec 06, 2015 at 03:51 AM.
Dec 06, 2015, 03:35 AM
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Only photobucket, not flickr?

No price yet on frame just yet. Some components require specialist manufacturing, waiting on prices.

Quote:
Originally Posted by RaymondM
Awesome bro! Congrats. Be sure to post your swag here as we will all want a look.

BTW any hint' as to the price of this frame that you can release or is it still tba?

Oh yeah one thing about Photobucket, it will bother you with ads you can pay like .99 cents a month to have them removed , they are so annoying, I did.
Dec 06, 2015, 03:45 AM
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RaymondM's Avatar
Wow, I have been in the dark ages, just checked out Flicker, looks like I will be adapting this into my repertoire of picture sharing!

This sounds so cool , I will wait on price patiently, thanks again.
Dec 06, 2015, 06:14 PM
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you can also check out imgur.com which has cut-and-paste'able code to embed in forums, no effort required.
Dec 07, 2015, 12:15 AM
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Feathered Arm Root Model


In this scenario, we model the impact of feathering of the root.

We have kept the arm at 3mm thick however have added a wide feather at the root. In order to reduce weight and improve the continuity of the stress levels, we have also reduced the neck width from 18 to 16mm width. We have also tried to reduce weight around the arm mount as this strength is not required at all.

Overall the stress impact has been significant with the highest stress level reduced by some 30-35%. Importantly, the weight gain is only ~1g. This reflects adding CF only where required and removing where less is required.

We also see the stress levels more evenly spread across the length of arm which should see the arms flex more uniformly. This is achieved by changing the radius of the feather until the required equilibrium is achieved.

This type of arm shape is not common in H frames but is a common feature with unibody frames.

The downside of this approach is a small increase in surface area and also manufacturing cost due to more CF being utilized.



Quote:
Originally Posted by boltrc
The picture below depicts the simulated stress of 20 newtons of force applied to the flat side of the motor mount of a quad arm. The arm simulated is a typical H quad 6in arm anchored by two bottom plates. The arm is 18mm wide and 3mm thick with no feathering at the root.

.........
Note: the upper chassis plate is is hidden from view to show the full arm.
Dec 07, 2015, 02:46 AM
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Very interesting thread. I will be following very closely !
Dec 07, 2015, 04:38 AM
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Levendis's Avatar
Eye candy for the quad nerd...keep'em coming!

How about if you consider the bottom plate as well since that's a common failure point especially where the arm attachment points are.

That and considering multiple impact scenarios...(the dreaded flap followed by a dead stop upside down scenario...)
Dec 07, 2015, 04:40 AM
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RaymondM's Avatar
+1, I agree that would be some interesting info.


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