Questor: The Modular Model Airplane Project
Keep in mind that any notes here are notes to myself.
- Braces may be added to the top of the stab to support fin against lateral stresses.
- Think of some way to plug the power connection access holes to protect from debris, paint, etc.
- Consider whether solder should be applied to power access holes, before or after lamination. May be a good idea to do it before in the event the copper fails to hold up.
- Determine how to seal perimeter of connection access holes without affecting contact points (i.e. how to mask the copper).
- Trace all wiring patterns in the upper laminate prior to lamination of the horizontal stab so that I have a reference pattern in case I ever need to drill or cut into the stab for some reason.
- The copper traces are thin and the adhesive backing becomes unglued when heated excessively. The process of REMOVING a conductor from a connection point should be performed with extreme care to ensure the integrity of the copper is not compromised.
The right-hand boom stick will carry both power lines for the tail lights.
- Determine how control rods will mount to boom and mark all mount points and pre-drill any required holes and pre-cut any required grooves.
- On finished airframe, CLEARLY mark wire paths on right boom (use pin striping).
- Right-hand boom may not bend as easily due to additional epoxy in wire path - ensure symmetry when joining at the tail.
- It was a fluke that the power lines for the tail wound up in the right-hand boom stick, but this is good, since the muffler is on the left and prop wash will carry any fuel splatter to the top of the right side of the vertical stabilizer, thus protecting the outer contact points somewhat.
- Hot glue can be used to plug and protect unused exposed power connection points.
I may have been myopic in my design considerations. Perhaps it is a bit late to consider any radical changes at this point, but due to the modular nature of this airplane, a new tail boom (and tail section) could be designed and built, independently, in the future.
Instead of drawing the tail boom sticks together to a point at the tail, they could be brought straight back. This would require only two thin plywood segments in the horizontal stabilizer for mounting, and mounting bolts could drive right into the boom sticks. Desiging a slip-in electrical connector would be simple. The only complex piece would be how to mount the fin to the stabilizer, and how to run the control rods.
Further analysis might reveal that this would actually be a more complicated design, but it might be worth pursuing in case there is a simpler solution based on the concept.
Don't use wood glue on balsa wood - I think it is water-based, and it causes the balsa to swell.
CA glue - slow and fast
New alternator drive and alternator