- Aircalcs3 - J-54 (Folded KFm Slope Delta)
- Black orange and white
- wing bowed up, straightened with an extreme tape spar on bottom
- elevon hinge line on bottom of wing
- 350mAh 1S Lipo w/ voltage booster
- 3.7g servos
- Folded leading edge was too draggy, did not slope well.
- Slotted tail concept worked well, used it later on J-55 and J-57
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