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Old Apr 02, 2012, 07:26 AM
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Thank you for the plans. Here is how my model is coming up. So far the weight is 400 grams without electronics.
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Old Aug 23, 2012, 09:13 AM
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United Kingdom, Scunthorpe
Joined Dec 2011
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Thinking about building this, i have a bit of xp in scratch building. i am looking for a bit of a challenge. is this good???

thxs

Aviator001
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Old Oct 10, 2012, 12:08 PM
bps
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Indianapolis, IN
Joined Apr 2001
847 Posts
I need one of these to haul up my Space Shuttle Challenger 1/42 scale. This just about fits the bill, just needs a bit of tweeking. 4 380's with 5" props and taller gear should do the trick. Maybe I will even build molds and just form it. Plans in hand and I am ready! Currently I release the shuttle from a Sig Senior Kadet, just does not seem right to use this combo though!
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Old Oct 10, 2012, 07:30 PM
bps
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Indianapolis, IN
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847 Posts
Where is the cg on this plane, I do not see it noted on the plans? Help!
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Old Oct 12, 2012, 06:06 AM
bps
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Indianapolis, IN
Joined Apr 2001
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Quote:
Originally Posted by bps View Post
Where is the cg on this plane, I do not see it noted on the plans? Help!
Found it by reading through the posts 180mm from the trailing edge of the wing center section.

I have started cutting the plywood fuse crutch, tracing the fuse formers and wing ribs. Have also decided to go with a non scale undercarriage using 3 1/8" wire nose gear with 2" light foam wheels. Our field is grass and I might stand a chance of taking off from it with this set up. The nose gear units will provide more shock absorbing action. Should have this bird ready by early spring.
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Old Mar 24, 2013, 11:27 AM
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Italy, Lombardy, VA
Joined Jan 2013
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Good, congratulations! hello Michele
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Old May 18, 2013, 08:30 PM
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United States, MD, Salisbury
Joined Mar 2013
7 Posts
I am building one of these with dollar tree foam board at 50% I am going to put a pusher prop on the back
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Old Aug 09, 2013, 03:55 PM
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Hello guys. My name is Dominykas, i am from Lithuania and i am making this airplane and i have 2 questions :
1. How to install front wheel & servo.
2.Can i use 2x 64mm EDF's like that http://www.hobbyking.com/hobbyking/s...v_45A_ESC.html
Thanks.
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Old Aug 10, 2013, 05:27 AM
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Questions about B747

Hello, my name is Dominykas, i am from Lithuania.
I am making this cool Boeing 747 and i've got 3 questions:
1. How to install front steering wheel with servo?
2.How to connect 2 elevators to 1 servo?
3. Can i use 2x 64mm EDFs like http://www.hobbyking.com/hobbyking/s...v_45A_ESC.html

Thanks,

Dominykas
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Old Aug 12, 2013, 06:37 AM
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Southlake, TX
Joined Jan 2008
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Quote:
Originally Posted by DominykasLT View Post
2.How to connect 2 elevators to 1 servo?
You can Y the Pushrod to go from 1 servo to 2 elevators or run 2 sleeved pushrods from one larger servo.

This is how many small jets run their elevator servo.
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Old Jun 29, 2014, 10:42 AM
JimmyB
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United Kingdom, England, Farnham
Joined Apr 2013
34 Posts
Here's my build....

Dr mad thrust 50mm EDF's x 2
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Old Aug 12, 2014, 03:43 AM
Don't forget to scream
Joined Sep 2012
29 Posts
My Build

Hi guys and gals,

i've been following this thread for a few months now wanting to start my own build. I've had some 70mm fans laying around for a while now. they came with hobbyking models and weren't quite powerful enough as a single, but i think will perform well in this quad setup.

I'm just starting out to become a L/AME, so the livery will be whoever employs me (or the QANTAS "City of Longreach" 747-400 if i get picked up by a company not operating the jumbo)

a few notable changes i'll be making

-150% size to utilise 70mm fans
-plane will have 4 functional engines and run on 4S (perhaps a switch to select between 2 and 4 engines)
-modified fuselage formers as per earlier posts
-the plane will be made/transported in 4 sections
++++the empenage will be removable
++++the wing sections outboard of engines 2 & 3 will be removable
++++the middle fuselage, nose, and central section of the wing will be a single piece
-i'll be moving/modifying the W2 and W3 formers to coincide with the engine mount pillar to simplify inner wing workings
-slotted fowler flaps (to be determined)
-18 wheel landing gear with gear doors
-4mm marine ply will replace the specified 3mm ply, for extra rigidity
- all spars and wing formers will be ply


one thing i noticed, i dont agree with the wing spar drawn at the bottom of SHEET 2. it travels close to the trailing edge at the wing root. i think it seems to tall, but i could be wrong
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Old Sep 04, 2014, 02:04 PM
bps
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Indianapolis, IN
Joined Apr 2001
847 Posts
My 747 flew last night using two 3400kv motors and 5.5" props. This set up blew through (2) 2.2 amp 3s batteries in 3 minutes. One battery for each motor. Flew fine with plenty of speed with this set up. Nice gentle flight characteristics with the CG about 40% of wing cord. Our flying field is grass so ground clearance was the real issue. I am considering switching to EDF units to help with ground clearance. Power system as is is overworked.
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Last edited by bps; Sep 05, 2014 at 10:26 PM.
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Old Sep 05, 2014, 02:55 PM
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Joined Sep 2014
1 Posts
thank you for the plans

I'm really thankful for these plans.
Here a picture of mine at the moment.
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