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Old Mar 02, 2012, 04:32 PM
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Smokin' Beaver's Avatar
Australia, WA, Warwick
Joined Jul 2003
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Nice one '54 I like the retracts setup.
What brand are those ones - that's much simpler and cleaner setup than what I built in my B-17..


Phil
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Old Mar 02, 2012, 10:10 PM
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Bill Smudge's Avatar
United States, KY, Bowling Green
Joined Jul 2011
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Greeting Spit,

I marvel at the job you did insert planking the B-17's fuse. I'm all new to the world of planking, insert/planking, and sheeting. I was curious why you choose insert planking over the other two options? I'm trying to learn something here...


Also that West Wings Hawker Hart of yours make me cry it's so pretty.


Bill
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Old Mar 05, 2012, 12:55 AM
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United Kingdom, England, East Riding of Yorkshire
Joined Jan 2011
618 Posts
Quote:
Originally Posted by jofrost View Post
Hi Spitfire ,

Glad to have you join in . Just change your title to read " Funbuild 5 - Guillows B17"

Thanks ,
-John
Quote:
Originally Posted by Smokin' Beaver View Post
Nice one '54 I like the retracts setup.
What brand are those ones - that's much simpler and cleaner setup than what I built in my B-17..


Phil
Hi Phil
The retracts are as follows:

Electric Retracts 18.8g from HobbyKing

Spec.
Working voltage: 4.8~6V
Speed: 0.55s/60deg 4.8v - 0.45s/60deg 6v
Travel: 90 degree
Dimensions: 54.8x32x21mm
Weight: 18.8g
Shaft size: 3mm

Mount Dimensions:
Mounting Plate Dimensions: 32mmx25mm
Hole Spacing: 17mmx25mm
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Old Mar 05, 2012, 01:00 AM
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United Kingdom, England, East Riding of Yorkshire
Joined Jan 2011
618 Posts
Quote:
Originally Posted by ediaz View Post
Wonderful build! I appreciate your skill, patience and attention to detail. Like a good book I can't wait to get to the end and the maiden flight.

Question concerning the weight currently at 21oz. You said you weighed all the components...etc. Is that including batteries? Will you be using two in series or parrallel? I've seen other multi-motor builds where they split it up.

Thanks and good luck!
Evelys

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Hi Evelys I'm planning on using one battery I have looked at other options, but decided on the single battery route 21oz less weight of battery
Charles
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Old Mar 05, 2012, 01:05 AM
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United Kingdom, England, East Riding of Yorkshire
Joined Jan 2011
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Quote:
Originally Posted by Bill Smudge View Post
Greeting Spit,

I marvel at the job you did insert planking the B-17's fuse. I'm all new to the world of planking, insert/planking, and sheeting. I was curious why you choose insert planking over the other two options? I'm trying to learn something here...


Also that West Wings Hawker Hart of yours make me cry it's so pretty.


Bill
Hi Bill
I opted for the insert planking method as I think it adds strength to the finished job and also keeps the original profile, shape and size of the prototype and to be honest I enjoy that building method.
Charles
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Old Mar 13, 2012, 02:27 AM
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United Kingdom, England, East Riding of Yorkshire
Joined Jan 2011
618 Posts
Hi Everyone some updated images spent hours sanding the fuselage which is almost there (the filler used is a lightweight two part which is very easy to sand), have the underside of the wings sheeted but not yet sanded, the ailerons are fabricated and the tail feathers fit ok am almost ready to start the electrics in the wings so that the top surfaces can be sheeted. I was considering having the tail wheel as a castoring unit not connected to the rudder anyone have thoughts on that?
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Old Mar 13, 2012, 05:57 AM
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USA, FL, Tampa
Joined Jul 2002
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Wow! I admire the patients it took to cut and fit all those insert pieces. That is very nice work. What does it weigh?
Mine flew ok at 20oz but was underpowered with the brushed IPS motors. It actually had the power but the pitch speed was too low and I was already using the lowest gear ratio. It flew at just above the stall speed and if turned too tight it would spin in.
You are using 10 gram motors?

Glenn
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Old Mar 13, 2012, 07:50 AM
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United Kingdom, England, East Riding of Yorkshire
Joined Jan 2011
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Hi Glenn – I am using 4 x 10g motors with 5x3 GWS props and 6A ESC's with a 5A switched BEC – I weighed the whole airframe plus electrics, engines, retracts etc. and it came out at 21oz, so I'm hoping to be under 27/28oz by the finish – perhaps less
Charles
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Old Mar 13, 2012, 09:23 AM
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That sounds like a good weight for the power system you selected. Those motors weigh 20 grams less than the IPS for a savings of 80 grams!
Humm, maybe I should remotor mine and give it another go.
Glenn
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Old Mar 13, 2012, 10:04 AM
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United States, KY, Bowling Green
Joined Jul 2011
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Moving right along and really looking great...

What's that 2 part lightweight filler your using? I have some light weight wall spackle to use on my Hellcat but I don't think it dries very firm.

Bill
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Old Mar 13, 2012, 11:21 AM
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United Kingdom, England, East Riding of Yorkshire
Joined Jan 2011
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Hi Glenn – that would good to see.
Hi Bill – it is manufactured by Ronseal in the UK – it's used for making repairs to wooden window frames etc. I guess you will have something similar.
Charles
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Old Mar 13, 2012, 05:21 PM
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Parkk's Avatar
Near Austin, TX
Joined Dec 2008
432 Posts
tail Wheel

Man that looks sharp !

About the tail wheel castoring, It may not work well. On my GB-17 I control the taiI wheel with the rudder servo . think it has saved me a couple of times at low speeds.

Thanks for posting your build.

Ken
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Old Mar 13, 2012, 05:32 PM
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glewis's Avatar
USA, FL, Tampa
Joined Jul 2002
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Oh yeah, about the tail wheel.
I tried a castoring tail wheel, once. With no brakes to control direction it is nearly impossible to steer using rudder alone.
I've found it is much easier to steer with the tailwheel in a fixed position.

On my B-17 I linked the tail wheel to the rudder. The rudder pushrod is connected to the rudder horn and a short link from the horn to the tail wheel horn.

Glenn
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Old Mar 14, 2012, 01:55 AM
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United Kingdom, England, East Riding of Yorkshire
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Thanks for your comments – I will have to look at linking the tail wheel to the rudder, will keep you posted
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Old Mar 14, 2012, 10:34 AM
Isaiah 40:31
rc capo's Avatar
West Palm Beach, FL
Joined Jun 2000
691 Posts
About that tail wheel-unless this beast takes to the air quickly, a linked tailwheel is the way to go.
Might not be so twitchy when that pesky windsock blows every other direction except down the runway. Enjoying your build!

rc
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