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Turnigy Spacewalker half scale 168" 4.3m electric
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MeMeMeMe69 View Drop Down
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Posts: 79 		  Quote MeMeMeMe69 Quote  Post ReplyReply Direct Link To This Post Posted: 07/Feb/2011 at 6:22am
Weight

I have weighed everything built so far, all the remianing wood to build the wing and fus and then all the motors, servos, esc's, batteries etc. Total weight 35kg.

However, this does not include the covering. I have calculated 8.5 yards of the 60" wide Diatex 1000. Does anyone have an idea of what weight this will add when doped and painted?

My initial target weight was between 30kg and 45kg (a wide range because I did not have any good idea of what it would be), so it looks like I am somewhere within this range. :D

Andy
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Posts: 79 		  Quote MeMeMeMe69 Quote  Post ReplyReply Direct Link To This Post Posted: 07/Feb/2011 at 6:21am
Fus front half now together. here it is all jigged up with epoxy drying. The only problem with freezing temp was the epoxy took forever to set!


And the the next few pics show the top half of the fus being worked and prepped ready for sheeting. I have also made the front pilot hole....must be a tight fit in the full size!!

The sheeting around the pilot seat is a laminate I make of 3mm balsa with 0.4mm ply attached. It makes a really nice lightweight strong material for large areas.
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Posts: 79 		  Quote MeMeMeMe69 Quote  Post ReplyReply Direct Link To This Post Posted: 06/Feb/2011 at 9:01pm
Originally posted by Mustang Sally



I would make a hub with a woodruf key and a plate.

Something like this:



Thank you. That looks just the right sort of thing. I'll see if I can turn one up....the tricky part is the keyways!
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Posts: 79 		  Quote MeMeMeMe69 Quote  Post ReplyReply Direct Link To This Post Posted: 06/Feb/2011 at 8:57pm
Thanks for the reply Ian. I also fly lots of large electrics. I have a Eurofighter 5Kw EDF, a 4.5Kw Citabria and lots of 3 to 4Kw aerobatic planes. My half scale build is actual nearing completion, I am just a bit behind with posting pics. I hope to get it up to date in the next few weeks. I will also add a video showing the complete plane.
Regards, Andy
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Posts: 265 		  Quote Ian W Quote  Post ReplyReply Direct Link To This Post Posted: 03/Feb/2011 at 7:12am
Hi Meme, excellent craftsmanship and quite inspirational.  I have a 1/3 scale spacewalker and that is big enough but 1/2 scale - you'll be needing a trailer!
 
I agree with your thoughts on the Turnigy products and as insurance I always pull the big motors apart to oil the bearings and lay additional epoxy between the magnets.  I fly large scale electrics anf they are all powered with Turnigy equipment.  Current build 89" MX2.
 
Look forward to more updates and pics!
Any time not spent fly'n, break'n and fix'n is time wasted!

Cheers

Ian
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Posts: 1956 		  Quote Mustang Sally Quote  Post ReplyReply Direct Link To This Post Posted: 02/Feb/2011 at 6:52pm
NUTS ???? Dude Wink, this is pure craftsmanship Clap and the basis of our hobby before the ARF's. 
A minimal technical knowledge is required for this hobby; please ensure you know the differences between up and down.
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Posts: 120 		  Quote roboforcerX2000 Quote  Post ReplyReply Direct Link To This Post Posted: 02/Feb/2011 at 6:46pm
Dude, you`re nutsSmile Very nice work, can`t wait for flight videoClap
No God will tell me how to live, I have a wife for that...
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Posts: 1956 		  Quote Mustang Sally Quote  Post ReplyReply Direct Link To This Post Posted: 02/Feb/2011 at 12:14am
Originally posted by MeMeMeMe69

Motor

And now for something really tricky. I am mounting 2, 7Kw electric motors on a single shaft. I have removed the shaft from one and designed a combined shaft as below. The outrunner casing on the rear motor will be pinned to the shaft using the middle 4 'flats'and 'pin drive'.
I am not used to mounting props with this amount of power turning them so I do not have details of a multi-bolt prop driving system. Has anyone got details they could let me have so I can machine one up to fit the front electric motor? Thanks.




I would make a hub with a woodruf key and a plate.

Something like this:
A minimal technical knowledge is required for this hobby; please ensure you know the differences between up and down.
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Posts: 1224 		  Quote Asad Quote  Post ReplyReply Direct Link To This Post Posted: 01/Feb/2011 at 10:55pm
Nice work!
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Posts: 79 		  Quote MeMeMeMe69 Quote  Post ReplyReply Direct Link To This Post Posted: 31/Jan/2011 at 9:10am
Fuselage

I also continued with buiding the fus sides, up to the join point. The fus is built in 2 pieces, each about 1.5m long


I have desinged the fus to look excatly like the full size, which is a steel space-frame. The longerons match the steel in the full-size. I have also set up a row of block packers that build-in a complex curve (15mm lower at F1 than the middle and 34mm lower at F6).


Here is the fus side after the glue dried.
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