I didn't see anything specific on this topic, so...what about slots in a minimum-diameter airframe, just wide enough for the fin? (Airframe is not the motor case.) Good idea, bad idea?
Slot airframe, sand slots and root edge and sides thoroughly (wet-sanding with epoxy+slow curative would not be amiss). Wrap wax paper or other release material around motor case. Slide motor case in place, epoxy fins in place. Cure, remove case and release material, then fillet or tip-to-tip as desired.
I don't know how much additional support for the fins could be expected by having them recessed the tube-wall-thickness. Though I've seen/bought kits, not MD, that had TTW fins with tabs only as long as the tube thickness. Sounds like it's an improvement over surface bonding.
There's the issue of weakening the airframe but that ought not to be terribly serious if the motor itself isn't the airframe. Then again, as an old and emphatically not beloved teacher used to say, I may be full of old bootlaces and sardine juice...
Anyone out there done it this way? Results? Discussion? Questions? Comments? Physical threats?
Slot airframe, sand slots and root edge and sides thoroughly (wet-sanding with epoxy+slow curative would not be amiss). Wrap wax paper or other release material around motor case. Slide motor case in place, epoxy fins in place. Cure, remove case and release material, then fillet or tip-to-tip as desired.
I don't know how much additional support for the fins could be expected by having them recessed the tube-wall-thickness. Though I've seen/bought kits, not MD, that had TTW fins with tabs only as long as the tube thickness. Sounds like it's an improvement over surface bonding.
There's the issue of weakening the airframe but that ought not to be terribly serious if the motor itself isn't the airframe. Then again, as an old and emphatically not beloved teacher used to say, I may be full of old bootlaces and sardine juice...
Anyone out there done it this way? Results? Discussion? Questions? Comments? Physical threats?