# TerraHawk battery overlay for the Tattu 6S 4500 25C LiPo, the optional tuning pack (Ryan, 2026-10-01).
# The flight pack is the 6S2P Molicel P50B (10 Ah); terrahawk-common.parm carries its values. Load this file
# last, after the airframe file, only when the Tattu is fitted. Then load the common file again before the
# next flight on the P50B. The voltages are the manual's LiPo figures (docs/battery.md). On the Tattu the
# aircraft needs 109 g of nose ballast to keep the CG at 265 to 270 mm; with it, about 2.59 kg all-up
# (th-aeronautics, ballast at 20 mm). The P50B build is about 2.76 kg with about 55 g in the nose cups at
# Y 56 (cg.md, 5331f18). At Y 56 the Tattu needs more than 109 g, and the cups hold about 84 g of steel:
# confirm the Tattu's ballast with th-aeronautics before it flies.
BATT_CAPACITY     4500
Q_M_BAT_VOLT_MIN  19.8
BATT_LOW_VOLT     21.0
BATT_CRT_VOLT     20.4
# Capacity triggers at 50 % and 30 % (900 mAh apart). The return energy is mostly the hover: 60 s at about
# 28 A is about 470 mAh, a tenth of this pack, so 30 / 15 % (675 mAh apart) could not cover a return. Fly the
# Tattu only within 500 m of home. Its landing sag is not measured; 30 % follows the P50B (2026-10-01). The
# voltages above are the manual's LiPo figures and sit well below these charges: no LiPo table yet.
BATT_LOW_MAH      2250
BATT_CRT_MAH      1350