Ecalc
1.0
Headroom Calculator instructions:
Here you will target 25-30% motor RPM head room. Click Recommend My Pinion button to start with that pinion tooth count. Experiment with gear ratios to see what head speeds will allow near 25%, then feel the difference in flight. Please heed the warning messages; they are carefully thought out for your benefit. :-)
by:
Sam2b
Use check boxes to override values.
Heli Size:
800
760
700
600
550
500
450
250
Lipo Cell Count:
1
2
3
4
5
6
7
8
9
10
11
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30
Enter Number
Motor KV:
Required
Enter Number
Out of range.
Watts
Enter Number
Must be positive.
Pinion:
8
9
10
11
12
13
14
15
16
17
18
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Enter Number
Main Gear:
Acrobat Shark (211T)
Ark X-400 (138T)
Alees Rush 750 (112T)
Align T-Rex 250 (120T)
Align T-Rex 450 (150T)
Align T-Rex 450 helical (121T)
Align T-Rex 500 (162T)
Align T-Rex 500 helical (134T)
Align T-Rex 550 (170T)
Align T-Rex 550 helical (112T)
Align T-Rex 600 helical (188T)
Align T-Rex 600 straight (170T)
Align T-Rex 600 helical (112T)
Align T-Rex 700E (115T)
Align T-Rex 700E helical (112T)
Align T-Rex 700N (164T)
Audacity Pantera P5 BBC (Lerch Mod) (86T)
Avant Aurora (99T)
Banshee 700 Limited (216T)
Beam Avantgarde (150T)
Beam E4 (150T)
Bergen Tazer 800 (90T)
Century Swift (96T)
Century Radikal E640 (103T)
Century Radikal E640-opt (94T)
Compass Warp 360 (135T)
Compass Atom 500 (78T)
Compass Atom 6HV (104T)
Compass Atom 7HV (136T)
Compass Atom 7HV slant (127T)
CY Rave 450 (177T)
CY Rave ENV (130T)
Dynam E-razor 450 (104T)
E-Flight mCPX (64T)
E-Flight Blade 300X (140T)
E-Flight Blade 400 (140T)
Esky Blade CP (140T)
Gaui X2 (120T)
Gaui X5 (120T)
Gaui X7 (100T)
HDX500 (94T)
Henseleit TDR Ridgid (160.65T)
Henseleit Three Dee NT (108T)
Hirobo Freya (93T)
Hirobo Freya (95T)
Hirobo SDX (87T)
Hirobo Lepton (94T)
JR Vibe Nex E8 (87T)
JR Leggero E8 (90T)
JR Vibe SG E12 (93T)
JR Sylphide E12 (120T)
Kasama Dune (104T)
Kasama FaiFa (120T)
Kyosho Caliber 700 (70T)
KDS 450Q (100T)
KDS Innova 550v2 (150T)
KDS Innova 600 (115T)
KDS Innova 700 (115T)
KDS Agile 7.2 (178T)
LAHeli Ricco (110T)
Logo 400 Mod 0.5 (200T)
Logo 400 Mod 0.7 (138T)
Logo 5/600 Mod 0.5 (212T)
Logo 5/600 Mod 0.7 (153T)
Logo 5/600 Mod 1 (106T)
Logo 600SE (106T)
Logo XXtreme (175T)
MA Furion 450 (150T)
MA Furion 6 (109T)
MA Whiplash (124T)
MSHeli MiniProtos (120T)
MSHeli Protos 500 (93T)
MSH Prôtos Max (190)
Minicopter Diabolo (196.3T)
Minicopter Joker 1 (219.8T)
Minicopter Joker 3-Feb (162.7T)
Outrage 550 (140T)
Outrage G5 (150T)
Outrage Fusion 50 (129T)
Outrage Velocity (132T)
RJX EP50/90 (100T)
Roxxter 22 Rigid (92T)
SAB Goblin 500 (165T)
SAB Goblin 630/700 (204T)
SAB Goblin 770 (215T)
Solo Pro 180 3G (80T)
Srimok FaiFa (120T)
Synergy E5 (119T)
Synergy E6/E7 (116T)
Synergy E7SE (121T)
Synergy E9 (124T)
Thunder Tiger Raptor 30v1 (72T)
Thunder Tiger E620 (111T)
Thunder Tiger E720 (111T)
Thunder Tiger E700 (128T)
Thunder Tiger X50 (135T)
Thunder Tiger Mini Titan (150T)
Vario Notar (103T)
Voodoo 600 (218.6T)
Walkera MasterCP (114T)
Walkera V120D02S (100T)
Enter Number
Dual Stage:
Enter Number
Motor Head Room %
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Recommend 25% - 30%
Preferred Head Speed:
Enter Number
Out of range.
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