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T-REX 500 › 4 BLADED HEAD QUESTIONS
11-19-2017 04:03 AM  7 months agoPost 1
R38133

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USA

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I just put a 4 bladed head on 1 of my 500's and was wondering if there is anything I should do to the set up prior to a test hover and flight it has a V-Bar mini,scorpion 3026, and a jazz ESC I have a 4 bladed tail that will go on after a few flights to sort out the head and then if all goes good it will be going into a MD 500 fuse PLEASE any INFO would be appreciated

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11-19-2017 04:08 PM  7 months agoPost 2
co_rotorhead

rrVeteran

Centennial, CO, USA

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You will need to set up the phasing of the rotor head before you attempt to fly it. You can do this either mechanically, as shown in the video below, or electronically in your gyro. (I am not sure if the V-Bar mini supports this, so you'll need to look into that)

Watch at YouTube

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11-20-2017 02:48 AM  7 months agoPost 3
R38133

rrKey Veteran

USA

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OK got the phasing correct due to it's set cant change it's a align head. Ran into a ESC issue and had to change out the ESC took it outside a wow at 75 it sounded very scary went down to 50 and seems very unlocked and the tail will blow out if you look at the collective which I expected at such a low HS due to night fall I think tomorrow I will man up and bump it up to 70 and give it a try maybe bump up the V-Bar a bit the 4 B tail should help with the tail blowing out

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11-20-2017 03:17 AM  7 months agoPost 4
co_rotorhead

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Centennial, CO, USA

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As you have discovered, with 4 blades, you can reduce the headspeed quite a bit and get plenty of lift. As you have also discovered, by doing this, you begin to lose tail rotor effectiveness. The 2 most common solutions for this are 1) longer tail blades or 2) more tail blades.

Which option you go with will ultimately depend on how "scale" you want the helicopter to look. For example, on my 5-blade 600-size AH-6, I am running a 2-blade tail rotor with 105mm tail blades since the full-scale AH-6 has a 2-blade tail rotor and I am going for authenticity.

Since you already have a 4-blade tail rotor, you could always install that too if you don't want to go with longer tail blades on your 2-blade tail rotor.

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