About Mark Miles
more to come...
A practical approach to RC planes
Last week I finished cutting all of the foam and this past Sunday afternoon I assembled the main airframe. So let’s review.
Step Three: Airframe Assembly
Before gluing down the FK airfoil cut a 45 degree angel on the leafing edges of the narrow forward section. It’s much easier to do now before it’s glued in place.
Staring with the main airframe glue the KF airfoil in place. Focus on aligning the leading wing edges. Any hangover on the wing tips can be trimmed as soon as the glue drys.
The next step is to cut the leading edges of the wing. With a NEW blade cut near a 45 degree angle through both the main deck and the FK airfoil. Use a straight edge for best results.
The next step is to attach the upper and lower vertical sections.
Once in place start test fitting all of the lower structure. Take your time to make sure everything fits snugly and aligns true.
I’ve come to love the zippy 4000 mah 4 cell batteries. The pack a punch, give decent 16-20 minute flight time, and are a good weight for this airframe. So on this build I decided to build a custom battery holder in the main cavity.
Cutting the lower vertical to fit the battery I then build guides for the sides of the battery. Finally I tied it all together with the lower deck.
It’s now time to glue the runners and lower deck into place. It’s great to have an extra set of hands to hold it all together. Also don’t be afraid to toque the runners inward to meet the lower deck. This will give you a firm solid fix.
Find some heavy objects to hold it all together and let the rig rest for 10-15 minutes. During this time the glue will harden and set.
At this moment I took time to cutout the control surfaces on the tail, add some camo duck tape details, and then glued on the verticals. Take a scrap of foam and cut a 60 degree angle to help old the tail verticals in place. Keep this template for future builds.
Step back and enjoy. The final airframe looks great.
Next week we’ll move onto building the motor mount and control surface linkage.