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Step 2 - Drill Holes in Frame, Supports, and Arms

Posted by YouMadeMeDoIt, 25 June 2012 · 91 views

frame scratch built wood aluminum fpv quadcopter
For this step I clamped everything together after lining things up and drilled the holes to mount the arms to the frame and the frame to the 2 longitudinal aluminum support bars.

The 2 flat black pieces of plywood will sandwich the arms and longitudinal aluminum support bars.  The 1/2" aluminum arms have 3/8" wooden inserts for strength, and the 2 longitudinal aluminum supports were left hollow.  The roll bar you see in the photos will be mounted to the longitudinal supports.  Motor mounts are Multi Rotor Mega Motor Mounts from Blue Sky RC.

Fore and aft of the arms are 1/2" wooden bars which will provide additional support, as well as a mounting point for the second level of the frame.  I am planning to mount the ESC's and Power Distribution Board on the first level.  The board, RX, and Cameras will go on the second level.  Currently do not have a 3rd CopterControl board, so will be using a Naze32 until I can get my hands on a CC3D!

The battery will be strapped underneath as usual, and I may build a battery case depending on how things progress.  If the frame survives me teaching my bro and wife to fly, I will use it as a sporty FPV machine at some point.  If it flies well, it's easy enough to build another too!

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Very cool. Mind if I ask how much you estimate the frame build will cost, excluding electronics, etc?
Good question...

4x Motor mounts ~$30 with shipping (you don't need these)
Aluminum Bar ~$24 (2x 48" lengths with shipping - this project needs around 55" of bar and it would be cheaper if you could find it locally -- can also use 1/2" wood instead of aluminum for dirt cheapness)
Revell Plywood sheet from Michaels: $3.99
3/8" x 3/8" square wood rod from Michaels: $4 for 2 (not necessary either)
1/2" x 1/2" square wood $2
Hardware: $13 (estimate for nuts/bolts/washers/rubber plumbing washers)
Alum Bar for roll cage: $2 (local hardware store - paid $7 but used on 3 projects, also optional but will save the board in crash!)

So: $30 + $24 + $4 + $4 + $2 + $13 + $2 = $79

As you can see by the options, it can be done cheaper, and this estimate here is if you're just buying this stuff for this build. I try to buy materials that I can just keep feeding from for builds - so that also brings the expense down because I have a small stock in my workshop.