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Home✈️Aircraft🚁HelicopterHIROBOOther › Degree of Offset for the Freya EVO Tail Rotor?
07-18-2006 04:17 AM  14 years ago
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Heli-Jimmy

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Melbourne, Australia

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Degree of Offset for the Freya EVO Tail Rotor?
Hey all, im basically nearing completion of my Freya EVO and was wondering generally how much offset do I place onto the tail rotor to counteract the tail from spinning round from the torque of the main rotor.Is there some little rule or small measurement I can apply to the tail to set it up nicely? Thanks
Heli-Jimmy
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07-18-2006 04:23 AM  14 years ago
marc8090

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Long Island, N.Y.

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Are you setting it up to fly in normal mode or heading lock?
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07-18-2006 04:30 AM  14 years ago
Heli-Jimmy

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Melbourne, Australia

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Heading lock mode. Im using the Futaba GY401 Gyro....basically setting up for mild 3D....which apparently you dont use normal mode? Correct? It is just left in heading hold mode.
Heli-Jimmy
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07-18-2006 04:45 AM  14 years ago
TMoore

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Cookeville, TN

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Look at the slotted slider on the tail output shaft. The bellcrank should be square to the shaft so that there is a little pitch in the blades at hover. Boot the gyro up in HH and then switch to rate mode, mechanically trim the heli to fly straight and the switch to HH. Go fly.

TM
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07-18-2006 10:22 AM  14 years ago
Jafa

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Sydney, Australia

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The 401 only has one limit adjustment that is for both left and right - so you always get a symetric throw out of that gyro - provided you get full throw of the pitch slider on the tail shaft, side to side, this will leave you with a small mechanical pitch setting that works fine (designed in by Hirobo)

So just keep increasing the gyro limit travel until you get full travel of the pitch slider, end to end on the tail shaft - get the limit atv to over 100 at least (for long tail servo life and granular control)

If you max out on one side 1st, change the length of the tail push rod or move the tail servo up or down the boom to find the correct center point - then continue with the above procedure

Protos | Logo 400 & 500 | Sceadu Evo | Freya Evo | Trex600N | Avant FX
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07-18-2006 11:04 AM  14 years ago
Colin Mill

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England

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Hi Heli-Jimmy

In almost all cases a heli will hover with about 8 degrees of tail rotor pitch and I would recommend with any gyro that you set the pushrod length so that with the servo centred you have about 8 degrees of right pitch. Some helis benefit from some fine-tuning of the linkage after that but this is a very good starting point.

Best regards

Colin (CSM)
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07-18-2006 03:30 PM  14 years ago
Heli-Jimmy

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Melbourne, Australia

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Thanks, thats what I was after! Just a general idea of how much offset pitch to place onto the tail. 8 Degrees seems like the perfect starting point. Happy flying,
Heli-Jimmy.
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07-18-2006 03:32 PM  14 years ago
z11355

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New England

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that is about 1.25-1.5" (inches) between the tail tips when they
are folded over.
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Home✈️Aircraft🚁HelicopterHIROBOOther › Degree of Offset for the Freya EVO Tail Rotor?
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