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Dec 22, 2016, 02:16 PM
Wandering IT geek
ronin4740's Avatar
Quote:
Originally Posted by bhoov128
The top of the fuse has a lip that is inserted into the nose cone. Four things hold it on: The hog decal on the left, the hog decal on the right, the refueling pod decal on the nose, and two small spots of tacky glue inside the cone. Once you cut the decals with a sharp knife, wiggle the fuse side-to-side gently and the glue should come apart pretty easily.
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Dec 22, 2016, 07:56 PM
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renelu's Avatar
I put an old 808 keychain camera on mine between the EDF nacelles and snuck a flight in yesterday on the way to pick my kid up from school. Video quality isn't great, but here it is:

UMX A-10 BL BNF Basic flight video (4 min 2 sec)
Dec 22, 2016, 09:14 PM
Registered User
billhove2's Avatar

UMX A-10 Static Thrust Test Babble Batts vs Venom


Latest Blog for the lipo question
You can now definitively answer my question on Thrust
https://www.rcgroups.com/forums/show...0#post36476558
Dec 22, 2016, 09:29 PM
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bhoov128's Avatar
holy cow.... that's a giant difference!
Dec 22, 2016, 09:30 PM
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billhove2's Avatar
Quote:
Originally Posted by bhoov128
holy cow.... that's a giant difference!
My cameraman argued that the friction of the cardboard reduced the reading,... but it should be even for both.
Dec 22, 2016, 09:56 PM
They call me Lipo...
Justwingit's Avatar

UMX A-10 sighting!


FYI,

The Hobbytown in Las Vegas on West Sahara had a UMX A-10 on the shelf as of 1600 this afternoon....
Dec 22, 2016, 10:05 PM
I'd rather be flying!
turboparker's Avatar
Quote:
Originally Posted by billhove2
Latest Blog for the lipo question
You can now definitively answer my question on Thrust

Quote:
Originally Posted by billhove2
My cameraman argued that the friction of the cardboard reduced the reading,... but it should be even for both.
Nice! I knew that Roger's packs would be up to the task.

The drag caused by the plane sitting on the box most definitely reduced the thrust reading in both cases. The difference in weight would cause some difference in drag. However - it may not be enough to notice. You should do the test again - but with the plane sitting on its wheels. That will minimize overall drag & essentially eliminate any difference in drag due to the difference in weight.

Joel
Latest blog entry: E-flite 850mm Pitts
Dec 22, 2016, 10:45 PM
Fly,Crash, Burn,Fix, repeat
Gravythe Clown's Avatar
The big difference I see is one pack is 430 verses 850 mah. Both 30c.
430x30= 1.29 A
850x30= 2.55A

That's almost double the available draw.

So the motors have more ability to draw more amps in the 850 than the 450.
For this test to be worth its weight they both need to be 430's or 850's.

Just my $0.02

Gravy
Dec 22, 2016, 10:51 PM
They call me Lipo...
Justwingit's Avatar
Although I know next to nothing about batteries and so forth, I DO agree with Gravy.....I think they should be "like" items for a more accurate comparison....
Dec 22, 2016, 10:55 PM
I'd rather be flying!
turboparker's Avatar
Billhove2,

If you're going to fly with a pair of the Venom 430s in parallel, then the thrust test should be done that way. However - as we all know, advertised discharge C-ratings are often inflated. Certain LiPo cell manufacturers tend to be more honest than others. I bet that even with two of the 430s in parallel, Roger's Hyperion 850 mAh BabbelBatt will still win.

BTW - my 2s 850 mAh from Roger is a 50C. You listed yours as 30C. Which is it?

Joel
Last edited by turboparker; Dec 22, 2016 at 11:05 PM.
Dec 22, 2016, 11:04 PM
They call me Lipo...
Justwingit's Avatar
Well Joel,

I currently live in Las Vegas so I'll take that bet !

I've been flying on Roger's batteries the last couple of days and must say they're doing great ! But tests only work when comparing similar items. One battery @430mAh and one at 850mAh aren't similar items.....
Dec 22, 2016, 11:23 PM
big ignore list/drama is dumb
brushless55's Avatar
Quote:
Originally Posted by Gravythe Clown
The big difference I see is one pack is 430 verses 850 mah. Both 30c.
430x30= 1.29 A
850x30= 2.55A

That's almost double the available draw.

So the motors have more ability to draw more amps in the 850 than the 450.
For this test to be worth its weight they both need to be 430's or 850's.

Just my $0.02

Gravy
You are 100% correct
bigger packs almost always have less voltage sag vs a pack 1/2 its size and that will produce more power.
Dec 22, 2016, 11:29 PM
They call me Lipo...
Justwingit's Avatar
Maybe a more accurate comparison (and one I personally would be curious to see) would be between the recommended E-flite 800mAh 30C and the Babble Batt 850 50C battery.

Is the E-flite REALLY worth the dear price of $25.00???? I don't think so, but that's just my hunch.....
Dec 22, 2016, 11:36 PM
I'd rather be flying!
turboparker's Avatar
John,

Even a simple WOT pitch-test would probably show any difference, there. If the difference in pitch between packs @ WOT is quite noticeable by ear, the difference in thrust is likely enough to be noticeable in flight. I have one of each. And they're both new. So...I could do a pitch-comparison test between the E-flite 800 & Roger's 850.

Joel
Last edited by turboparker; Dec 22, 2016 at 11:50 PM.
Dec 22, 2016, 11:42 PM
They call me Lipo...
Justwingit's Avatar
Oh come on Joel, you know me.....

I've already done a flight comparison and Roger's batteries outperform the E-flite's hands down

I'm just curious to see the results measured on some kind of scale.........


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