loopzilla
12-15-2006, 10:53 AM
There are certainly a lot of choices on how you can gear a Logo 14, and with a flood of inquiries lately I thought I would try to start building a list of the part numbers, tooth counts, etc. Here are the gear combinations I am aware of, and some comments:
Double Stacked 200t, 0.5 Mod Main (MIK2725 x2)
200t, 0.5 Mod Lower Tail Drive (MIK2725)
40t, 0.5 Mod Drive Pulley (MIK2728 or MIK3047 AntiStat)
Pinions 5mm bore, 13 through 23t (MIK2813 - MIK2823, but some are too fluted to use with the double stack)
This combination is not widely used today as we seem to strip the 0.5 Mod gears with the increased torque available in today's motors. The 0.5 Mod gears were originally double stacked to increase the amount of tooth to pinion contact, and were 200t to allow running the old high Kv in-runner motors.
138t, 0.7 Mod Main (MIK3000)
200t, 0.5 Mod Tail Drive (MIK2725)
40t, 0.5 Mod Drive Pulley (MIK2728 or MIK3047 AntiStat)
Pinions 5mm Bore 10-18t (MIK3010 - MIK3018) or 6mm 15-17t (MIK4043 - MIK4045)
This is the most common configuration, and is in the manual. The 0.7 Mod main gear puts us in a category to use lower Kv motors, and have just enough mesh to prevent stripping for most pilots. Plus, there are a lot of pinion choices including the new 6mm bore 0.7 Mods for the 10-Pole Hackers. The tail rotor to main rotor ratio works out to be 5:1. Some people are stripping the tail drive pulley, which leads to...
138t, 0.7 Mod Main (MIK3000)
138t, 0.7 Mod Tail Drive (MIK3000)
28t, 0.7 Mod Drive Pulley (MIK3001 or MIK3048 AntiStat)
Pinions 5mm Bore 10-18t (MIK3010 - MIK3018) or 6mm 15-17t (MIK4043 - MIK4045)
This seems to be the most common 3D setup today, as we get just enough main gear mesh to prevent stripping in the air, plus a tail drive pulley with the same mesh. The tail rotor to main rotor ratio is really close at 4.9:1, but most people are running 92 or 95mm tail blades.
96t, 1.0 Mod Main (MIK2412)
138t, 0.7 Mod Tail Drive (MIK3000)
28t, 0.7 Mod Drive Pulley (MIK3001 or MIK3048 AntiStat)
Pinions 5mm Bore 9-12t (MIK2509 - MIK2512)
This is a good hardcore setup, as the main gear bite is even deeper, but pinion tooth count availability and bore sizes are the issue. I think Century has some 1 Mod pinions that get up into the high counts, but we still need 6mm bore for the 10 pole Hackers. *Make sure you get the NEW MIK3061 aluminum base plate, if you are doing this, as you will need the extra room to slide the larger pinion forward*. Tail rotor to main rotor ratio works out to be 4.9:1, same as above.
96t, 1.0 Mod Main (MIK2412)
96t, 1.0 Mod Tail Drive (MIK2412)
20t, 1.0 Mod Drive Pulley (MIK2487)
Pinions 5mm Bore 9-12t (MIK2509 - MIK2512)
Extreme hardcore setup for those guys that are really heavy on the tail. The tail rotor to main rotor ratio works out to be 4.8:1 The tail rotor RPM will be even lower, by 200 RPM or so, so you might need slightly larger tail blades.
That is the info I have, and will most likely need some correction and critique...
Double Stacked 200t, 0.5 Mod Main (MIK2725 x2)
200t, 0.5 Mod Lower Tail Drive (MIK2725)
40t, 0.5 Mod Drive Pulley (MIK2728 or MIK3047 AntiStat)
Pinions 5mm bore, 13 through 23t (MIK2813 - MIK2823, but some are too fluted to use with the double stack)
This combination is not widely used today as we seem to strip the 0.5 Mod gears with the increased torque available in today's motors. The 0.5 Mod gears were originally double stacked to increase the amount of tooth to pinion contact, and were 200t to allow running the old high Kv in-runner motors.
138t, 0.7 Mod Main (MIK3000)
200t, 0.5 Mod Tail Drive (MIK2725)
40t, 0.5 Mod Drive Pulley (MIK2728 or MIK3047 AntiStat)
Pinions 5mm Bore 10-18t (MIK3010 - MIK3018) or 6mm 15-17t (MIK4043 - MIK4045)
This is the most common configuration, and is in the manual. The 0.7 Mod main gear puts us in a category to use lower Kv motors, and have just enough mesh to prevent stripping for most pilots. Plus, there are a lot of pinion choices including the new 6mm bore 0.7 Mods for the 10-Pole Hackers. The tail rotor to main rotor ratio works out to be 5:1. Some people are stripping the tail drive pulley, which leads to...
138t, 0.7 Mod Main (MIK3000)
138t, 0.7 Mod Tail Drive (MIK3000)
28t, 0.7 Mod Drive Pulley (MIK3001 or MIK3048 AntiStat)
Pinions 5mm Bore 10-18t (MIK3010 - MIK3018) or 6mm 15-17t (MIK4043 - MIK4045)
This seems to be the most common 3D setup today, as we get just enough main gear mesh to prevent stripping in the air, plus a tail drive pulley with the same mesh. The tail rotor to main rotor ratio is really close at 4.9:1, but most people are running 92 or 95mm tail blades.
96t, 1.0 Mod Main (MIK2412)
138t, 0.7 Mod Tail Drive (MIK3000)
28t, 0.7 Mod Drive Pulley (MIK3001 or MIK3048 AntiStat)
Pinions 5mm Bore 9-12t (MIK2509 - MIK2512)
This is a good hardcore setup, as the main gear bite is even deeper, but pinion tooth count availability and bore sizes are the issue. I think Century has some 1 Mod pinions that get up into the high counts, but we still need 6mm bore for the 10 pole Hackers. *Make sure you get the NEW MIK3061 aluminum base plate, if you are doing this, as you will need the extra room to slide the larger pinion forward*. Tail rotor to main rotor ratio works out to be 4.9:1, same as above.
96t, 1.0 Mod Main (MIK2412)
96t, 1.0 Mod Tail Drive (MIK2412)
20t, 1.0 Mod Drive Pulley (MIK2487)
Pinions 5mm Bore 9-12t (MIK2509 - MIK2512)
Extreme hardcore setup for those guys that are really heavy on the tail. The tail rotor to main rotor ratio works out to be 4.8:1 The tail rotor RPM will be even lower, by 200 RPM or so, so you might need slightly larger tail blades.
That is the info I have, and will most likely need some correction and critique...