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Old Feb 21, 2007, 01:10 PM
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flair bf-110 motors

greetings,

as this would be my 1st twin electric, any suggestions for a brushless setup to (exceed) the speed 600's specified? i just ordered the kit, and intend to build per stock with the addition of landing gear.

thanks,

Pat Horan
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Old Feb 21, 2007, 02:08 PM
Balsa Flies Better!
Stamford, CT
Joined Oct 2000
6,716 Posts
Pat

I'd kick around a pair of Astro 19s swinging 9-10" props. They'll far exceed a Speed 600- will be much lighter. Shoot for 3s 3000 li-polys and Castle Phoenix 35 speed controls- which will give you the ability to use both BECs without worrying. I'd wire up each motor completely independently in its own nacelle- don't worry about a single large battery pack. (I fly a 4 lb P-38 twin.)

If you're limited in prop size to 8"- then a pair of Phasor 15/4s should work- unless you want to go really nuts and stay with the Astro 19s on 4s. I have a hunch though, that this would be lots of racket and not much extra speed.

FYI- I have both the Astro 19 and the Axi 2814/12 (it's nearest competitor). If I buy another motor in this size range- it's the Astro.

That's an interesting airplane- I've kicked a 110 around more than once.

Sam
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Old Feb 21, 2007, 02:26 PM
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thanks.

it seems like a lot of power for a plane that performs pretty well on old speed 600s. after this post (typical!) i found a thread concerning the kit. isn't it simpler to draw both motors and becs from one single pack in the nose? they did mention some balance issues, and batteries in the nacelles would be farther aft...
i was thinking of an outrunner that would approximate the speed 600, without the necessity of a belt or gear drive. there are some great camo schemes, i can't wait for the kit to arrive!

Pat
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Old Feb 21, 2007, 02:33 PM
Balsa Flies Better!
Stamford, CT
Joined Oct 2000
6,716 Posts
Hi Pat

Here's my thoughts-

The kit comes in at 5 lbs according to the mfg. Going brushless and lipolys should drop some weight- but I like at least 125 watts.lb for warbird performance- plus you want to add landing gear (retracts?) Hence something in the 250-300 watt range should do it- which is the Astro 19 on 3s li-poly. Since it's a healthy size airplane- I thought larger props would be the way to go. The Astro 19 does approximate an outrunner by the way- at least in terms of torque.

I guess you could mount the batteries in the nose without too much issue assuming your motor leads didn't get too long.

There is another alternative by the way- something like an Astro 035G. The performance is quite close to a brushless outrunner-they're much less expensive (I just paid $45 for a NIB motor)- the downside is that they weigh an additional 2 oz or so over a brushless setup. If you need weight in the nose, this might be a very nice alternative- and Astro gearboxes are bulletproof. (Can you tell I like Astro stuff?)

Sam
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Old Feb 21, 2007, 02:49 PM
Turrets Syndrome?
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Marina Del Rey California
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I have some info in this thread:
http://www.rcgroups.com/forums/showthread.php?t=210473
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Old Feb 22, 2007, 09:06 AM
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thanks a lot! that was the thread that i found after i posted the question! how difficult was the addition of landing gear to the model? i'm excited to start this project.

PAt
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Old Feb 22, 2007, 09:15 AM
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East Anglia, UK
Joined Sep 2002
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If there is room a pair of 200W AXI's wouk work nicely..you want something like 10v/40A so a single pack at 23s 400mAh would suit right up the nose, or two 2200 packs.

I wouldn't have said more than 75W/lb is needful, and with LIPOS should be able to get to 4.5lb..so 400W is more than enough. Wasn't the BF110 a bomber?

A pair of AXI 2217/12's looks about right, on 10x7 two bladers or 9x7 three bladers.
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Old Feb 22, 2007, 09:17 PM
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today is topped at the lhs (prop shop hobbies in warren mi, great guys), and they talked in the 100w/lb, or 250 per side. he showed me a himax that should do it, motors were $60 each... looks like i need to divest some of the glow power in the basement! know anyone who needs a os 91 4-stroke unused? (btw, that motor was purchased for a cambrian me-109, next i'll be looking to electrify that big sled!).
anyway, i'm looking forward to the build, i built a flair puppeteer a long time ago, and it flew great.
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Old Feb 24, 2007, 05:20 PM
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bomberguy,

i just got the kit today, do you have any insight on landing gear installation, as i don't want to "reinvent the wheel"! (i know, awful pun!).i've ordered some great luftwaffe color scheme guides, and am leaning towards a battle of britain look or possibly a balkan/ greek campaign.
i'm finishing my ryan f4f, then i can get started zerstorering.

Pat
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Old Feb 24, 2007, 05:49 PM
Turrets Syndrome?
Bomberguy's Avatar
Marina Del Rey California
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You'll have to ask my Dad, it's his plane and he did the install. They are fixed gear BTW. PM him, user name Epagel

Here are some photos that might help when you detail your model
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Old Feb 24, 2007, 06:02 PM
Turrets Syndrome?
Bomberguy's Avatar
Marina Del Rey California
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Here are some pictures of my Hero's (Guillermo Rojas Bazan) scratch built aluminum ME-110 display model. There are some good detail references here. His research is impeccable
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Old Feb 27, 2007, 07:01 AM
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what about the "atlas .25" 2909/12 outrunner from hobby lobby? it's price looks nice, and if it'll run with an eco 25 esc, i've already got one of those! seems like i'm right in between 200 watt systems and 300 watt, with much more cost in batteries, speed controls, etc.
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