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Old Mar 22, 2014, 01:22 PM
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Boeing_to_EMD's Avatar
United States, WI
Joined Jul 2012
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Build Log
1:36 Foamboard Airbus A300

Hello all,

I realize I've been on a hiatus for quite a few months, but my interests are turning back outside as the weather warms up again. Yeah, right...

Anyway, this will be my build log of this beast. Not sure what scheme I'm going to paint it yet, but I'm leaning towards FedEx (Most common A300 around here). Please note that although I am usually a perfectionist, I have told myself that this will be an exploratory fun build, so some dimensions may not be to scale.

So, dimensions are as follows:
Material: Dollar Store Foam board (Readi-board)
Length: 60"
Wingspan: 50" (for simplicity and rounding purposes)
Power: 2x55mm EDF's (please drop a line below recommending a good make and model)
ESC: ??? (pending power choices)
Battery: Would like to stick with Ni-MH (I hear groans... )
Weight: Haven't measured, just aiming to make her light and strong.

Looking at making it 5ch right now, retracts being the additional. I only have a 4ch transmitter, so I may upgrade later. Flaps will remain part of the solid wing for now, and may be hinged later. Also note that my methods are a compilation of other methods seen here on RCG and other forums, and some may be exploratory. Again, I'm trying to make this systematic to streamline the process and make airliners easier to build. I am using a page from deltamazda (Paul) for the schematics. Thanks for posting those schematics on the other thread, Paul!

Any other suggestions are greatly appreciated!

So, let's get building!
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Old Mar 22, 2014, 01:52 PM
Fly like there's no tomorrow!
Boeing_to_EMD's Avatar
United States, WI
Joined Jul 2012
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The following happened in 5 hours last night... Kinda proud of myself for doing so much in such a short time!

Alright, so we start with taking a look over our schematics (same page, just printed differently). (pic #1) We take note of what we want to work on, that is, the main fuselage from behind the forward gear to about 2/3rds of the way back (where it says "solid foam"). (pic #2).

Right then, rounding up, that'll be a 30" section, exactly the length of the foam board sheets. Since this aircraft is going to have a fuselage diameter of approx. 6.2", we'll make the internal supports to measure 6" (depron skin will later take care of the rest). Now, using my experience with building profile planes, we use cross sections for our main backbone. After cutting a single 6"x30" strip and two 3"x30" strips, we're ready to move onto the ribs. (Note that the 3" wide strips will be the top and bottom of the + shape, with the 6" wide strip being the - of the +).

Since this is my first airliner, I decided to make a simple circle for my fuselage (I sense many groans... ). After using a compass set to a 3" radius, I made my template piece of foam and traced out 28 pieces. (see pic #3). Note that the horizontal lines are where the ribs will be glued. Don't forget, this is the section where the wings will sit, so we need to build a wingbox. Picture #4 shows the bottom section of the + with an area for the wingbox cut out. Picture #5 is the basis of the wingbox (10"x6" with front and rear "lock-in" supports for the wings). #6 and #7 show the added insulation foam and more foam board supports for attachment to the - of the +.

(Confused yet? No? Good, keep up!)

In #8, I glued the bottom of the of the + to the - of the + and glued the wingbox to both. Obviously, it is the center of the plane and must be strong, so hot glue was used liberally. There is a slight gap underneath the wingbox, exactly where the wings will sit. #9 shows the inverted fuselage (without the top part of the +) where I ribbed the pieces together. #10 is the right-side-up version of #9, nothing changed. Then I glued the top piece of the + to the - of the + (I really need a better way to describe this. (# 11). And finally, I ribbed the top part of the fuselage in #12. All of this took 5 hours, but what a fun 5 hours it was!
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Old Mar 22, 2014, 01:54 PM
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Keenan smith's Avatar
United Kingdom, London
Joined Dec 2010
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Grumble grumble! :P jk
Great work subbed !
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Old Mar 22, 2014, 02:17 PM
Balsa and Foam can Coexist
WAGliderGuy's Avatar
United States, WA, Seattle
Joined Feb 2010
1,908 Posts
Nice work!! I recommend DonsRC and his wicked setups, I used one of his 64mm wicked motors + EDO fans on a similar sized twin airliner and I got a ton of power.

I highly advise against NiMH unless you want to have short white-knuckle flights - LiPos are really the only way to go these days with EDFs .

Keep up the good work!

Ethan
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Old Mar 22, 2014, 06:29 PM
Fly like there's no tomorrow!
Boeing_to_EMD's Avatar
United States, WI
Joined Jul 2012
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Quote:
Originally Posted by WAGliderGuy View Post
Nice work!! I recommend DonsRC and his wicked setups, I used one of his 64mm wicked motors + EDO fans on a similar sized twin airliner and I got a ton of power.

I highly advise against NiMH unless you want to have short white-knuckle flights - LiPos are really the only way to go these days with EDFs .

Keep up the good work!

Ethan
Thanks, Ethan. After doing more and more research, I've come to the conclusion that you are correct about Lipos. I guess I'll have to bite the bullet and change over. More new stuff! I took a look at Don's EDF setups; doesn't look bad, but he doesn't have 55mm units. Thanks for the suggestion though.
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Old Mar 22, 2014, 06:36 PM
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United Kingdom, London
Joined Dec 2010
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check out the Changesun 50mm 11blade fans and the Dr Mad thrust units from HK as they pack quite the punch too
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Old Mar 22, 2014, 06:56 PM
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Day 2; The Nose

With the easy part completed last night, I had a decision to make today: nose or tail. I chose the former. I started out by blowing up the schematic to the size I needed and traced it onto the foam and cut it out (#1). Then I made two side pieces for a "+" shape, similar to the fuselage (#2). I mapped out where the ribs will be glued and glued the sides to the main piece of the nose (#3). I then glued the nose to the fuselage and used 4 wood pieces to reinforce the attachment (#4). And finally (#5), I measured and cut out ribs for the nose.

Just 22" left until the fuselage is whole!
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Old Mar 22, 2014, 07:09 PM
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Nice Work Mate!
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Old Mar 23, 2014, 10:04 AM
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Boeing_to_EMD's Avatar
United States, WI
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Thanks, K!

So, I've been looking at a potential power setup and would like y'all's opinion on it.

2 of these units: http://www.hobbyking.com/hobbyking/s...ed_199_8W.html

With 2 of these ESCs: http://www.hobbyking.com/hobbyking/s...ontroller.html

Powered by which of these? And should I get 1 or 2? http://www.hobbyking.com/hobbyking/s...Lipo_Pack.html
http://www.hobbyking.com/hobbyking/s...Lipo_Pack.html

Also, is this a good balancer/charger for the batteries above? http://www.hobbyking.com/hobbyking/s...cessories.html

Thanks guys!

-Scott
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Old Mar 23, 2014, 10:23 AM
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Keenan smith's Avatar
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Joined Dec 2010
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1:36 Foamboard Airbus A300

Hi scott!

The charger is a great choice!
Edf's not so good as youll need a bit more power
And the esc's id say go for 30a or more as edfs are amp hogs
Also id say go for either 2 1800mah 30c 3s's for a lighter flight set up
Or go for 2 2200 30c for longer flights

K
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Old Mar 23, 2014, 01:40 PM
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Charelston SC U.S.A.
Joined Mar 2007
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Amazing progress on your A300!

Keep on keep'in on Scott!
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Old Mar 23, 2014, 06:48 PM
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Boeing_to_EMD's Avatar
United States, WI
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Alright, so I'm set with the balancer/charger, per K's confirmation. Anyone have any critiques for the new setup below?

2 of these: http://www.hobbyking.com/hobbyking/s...DF_3300kv.html

With 2 of these: http://www.hobbyking.com/hobbyking/s...ontroller.html

Powered by 2 of these: http://www.hobbyking.com/hobbyking/s...Lipo_Pack.html

How does this look?
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Old Mar 23, 2014, 06:50 PM
Fly like there's no tomorrow!
Boeing_to_EMD's Avatar
United States, WI
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Quote:
Originally Posted by demondriver View Post
Amazing progress on your A300!

Keep on keep'in on Scott!
Thanks DD! Always appreciate having you drop in!
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Old Mar 23, 2014, 11:01 PM
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Willoughby, Ohio
Joined Jan 2002
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Quote:
Originally Posted by Boeing_to_EMD View Post
I took a look at Don's EDF setups; doesn't look bad, but he doesn't have 55mm units. Thanks for the suggestion though.
I can no longer the 55 mm fan unit I use to sell, as it is no longer made. I only have 50mm Changesun 11 blade units and 50mm Wemotec then skip to 60mm

Don
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Old Mar 25, 2014, 09:18 PM
Fly like there's no tomorrow!
Boeing_to_EMD's Avatar
United States, WI
Joined Jul 2012
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Aft, Stabs, and Starboard!

Believe it or not folks, I have been working on the A300 the past few days; just too tired (*cough* lazy! *cough*) from building to upload the progress!

Alright, so in photo #1, I cut the parts for my + shape again, refer to fuselage section for explanation. In #2 I glued them into the + shape, then mounted the section to the aft end of the fuselage and secured it with 4 wooden supports (#3). #4 was quite easy to do, I just cut out the horizontal stabilizer and attached it via hot glue (#5).

Chasing tail? I think you mean, chasing "horizontal and vertical stabilizers" ; see picture #6 for reference. I won't be gluing the vertical stab until after I hinge the rudder. #7 shows an outline of the right wing with aileron marked. Again, I don't intend to have flaps or spoilers on this particular aircraft. #8 shows it in relation to the fuselage. I'll be building off that cutout for the airfoil. Wing looks really stubby compared to the fuse, but I've run the numbers multiple times, all is correct. Maybe I'll just throw some 64mm 12 bladed Change Sun fans on her; she'll fly fo' sho' then!
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