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Apr 02, 2016, 02:57 PM
I review RC Products
GBLynden's Avatar
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Discussion

E-flite UMX B-25


Here is my unboxing for the B-25!

E-flite UMX B-25 Mitchell BNF Basic RC Plane WWII Bomber Unboxing and Review (11 min 18 sec)
Last edited by GBLynden; May 28, 2016 at 12:53 AM.
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Apr 02, 2016, 03:36 PM
http://www.sgvhumane.org/
cmdl's Avatar
Reminds me of valiant's post - most definitively not extreme - https://www.rcgroups.com/forums/show...3&postcount=85
Apr 02, 2016, 04:06 PM
I review RC Products
GBLynden's Avatar
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That is a very good post, thank you. It is sad to hear that the "UMX Radian" motor is something to get excited about on a plane like this in 2016. That and having another new battery size to buy.

With that being said, I am still excited that they are even releasing another twin Warbird! I just hope the CG is good with the recommended battery our of the box and that it handles wind better than the UMX B-17.

GB
Apr 02, 2016, 05:17 PM
http://www.sgvhumane.org/
cmdl's Avatar
True. They have to exhaust their brushed motor inventory eventually. Any continuing interest in warbirds is a huge plus.
Apr 02, 2016, 06:21 PM
Registered User
Pretty cool, but brushed motors suck. That being said, I am gonna go fly my little Corsair.
Apr 02, 2016, 08:35 PM
Registered User
The day after he gets it, "Blaze" will put brushless motors in his new B-25.
The only brushless motors I have are in my CD players to open and close the trays.
Apr 02, 2016, 09:16 PM
http://www.sgvhumane.org/
cmdl's Avatar
Valiant and coreman have twin conversions here: https://www.rcgroups.com/forums/show....php?t=1820881
I was considering doing a 1s conversion on the PZ UM P-51 or the E-flite UM Corsair but decided I prefer keeping the motor and ESC in my Nano CP X (and in better cooling). Plus, it wouldn't be worth my effort given that these two planes are popular with Horizon and there is a chance they may bring them out in 2s.
And of course, valiant's post that I cited earlier (and one from turboparker that I forgot where I read), convinced me to not invest in any more 1s.
Apr 03, 2016, 07:52 PM
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dalecheek1's Avatar
Just preordered this for by Backyard,,,,,HAHA HA
GIANT SCALE RC WARBIRD: B-25 MITCHELL BOMBER (10 min 42 sec)
Apr 03, 2016, 08:06 PM
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dalecheek1's Avatar
GB make this your next plane..........ha ha hah
Apr 04, 2016, 12:35 AM
I review RC Products
GBLynden's Avatar
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Quote:
Originally Posted by dalecheek1
GB make this your next plane..........ha ha hah
I will with the little one.....lol
Apr 04, 2016, 04:02 PM
DFS#000178
Rampage's Avatar
Like I said in the other thread, I care WAY more about the airfoil than the motors. I don't have an issue with brushed motors. As long as they fly the airplane I'm happy.

I want this plane to have an airfoil similar to the P-47. I don't want anymore undercambered wings that can't handle any wind. This plane has a molded wing so it might be just fine, but the B-17 does too and it's got an undercamber in the wing...

I really don't like the silver windows, but that's easy enough to resolve. I really, REALLY like the fact that it's a Doolittle B-25B and not the MUCH more commonly modeled B-25J. So kudos for that!

Really looking forward to more info on this one.

We can get a bunch of 'em, draw a 'scale' Hornet on the field and see if we can fly 'em off a 'carrier'!
Last edited by Rampage; Apr 04, 2016 at 04:09 PM.
Apr 04, 2016, 04:18 PM
http://www.sgvhumane.org/
cmdl's Avatar
Quote:
Originally Posted by Rampage
I want this plane to have an airfoil similar to the P-47. I don't want anymore undercambered wings that can't handle any wind.
According to http://www.rcuniverse.com/forum/aero...omed-wing.html it isn't necessary that undercambered wings cannot perform in wind.
Apr 04, 2016, 05:03 PM
DFS#000178
Rampage's Avatar
The amount of lift they generate is a big contributing factor, though. Minor increases in airspeed (IE, wind) can make drastic changes in the amount of lift and the end result is a lot of bouncing around. Even with AS3X. Especially when you combine the undercambered wing with an exceptionally light loading.
Apr 04, 2016, 05:20 PM
http://www.sgvhumane.org/
cmdl's Avatar
Good to know. Thanks.
Apr 04, 2016, 05:24 PM
DFS#000178
Rampage's Avatar
Quote:
Originally Posted by cmdl
Good to know. Thanks.
I don't know if there's any science to back that up, that's just my experience with undercambered wings.

Someone will probably come in with a bunch of technical terms and prove me wrong.

Regardless, I really want this to have a flat bottom wing. From pictures, while it's hard to tell, it just might have a flat-bottom wing. Or very very minimal undercambering.

I also want to see a production sample. The one pictured is a prototype, no? The nose, canopy and turrets are all separate plastic parts so I'm hoping it'll have clear windows on the production version.
Last edited by Rampage; Apr 04, 2016 at 05:33 PM.


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