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HomeScale✈️AircraftScale HeliScale Helicopter Main Discussion › Anyone using DFC heads on their scale models?
04-22-2014 07:07 PM  6 years ago
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shawmcky

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Isle of Wight,United Kingdom

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Anyone using DFC heads on their scale models?
I have a Helibug T Rex gasser in a Funkey Jet Ranger fuselage,what are your thoughts using DFC?
Team- unbiased opinion.K.I.S.S principle upheld here
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04-23-2014 10:03 PM  6 years ago
Grimracer

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Eau Claire WI

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At the lower head speeds we operate at I would proceed with caution.

Grimracer
Michael J Zaborowski
Futaba USA
AMA 124909
IRCHA 5453
VARIO AND PEAK AIRCRAFT ROCK!
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04-24-2014 02:29 AM  6 years ago
doorman

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Sherwood, Arkansas

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Agreed
I think that the lower HS is going to cause the infamous "wobble"

If you don't mind the much higher HS, you might be OK, but then you might find some very UNWANTED harmonics building up and trying to shake your heli apart...
As Grim said... proceed with caution....

Good Luck, Stan
AMA 2918-Team Spin Blades,,Castle Creations, Unique Aircraft
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04-24-2014 02:40 PM  6 years ago
Mojave

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Palos Verdes, Ca. USA

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Educate me please... What in the DFC head is causing the wobble? Is it feedback in the FBL system gyro, caused by a harmonic, or??? I'm guessing it's more related to the dampers, but I could be wrong. I believe the DFC has the lower tail gear ratio also, which is not a "PLUS" for low rpm HS scale machines.
Barry
All helis and planes have an expiration date stamped on them...you only find it after you crash!!
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04-24-2014 02:44 PM  6 years ago
mikeangiulo

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Bellevue, WA - USA

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I did it just for the look

I ground off the Align name from the parts and hit it with some flat black (including the blades) and really like the way it looks.

I have only hover tested the model so I don't know really how it flies but it didn't seem to do anything strange for the first batteries
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04-24-2014 05:05 PM  6 years ago
Grimracer

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Eau Claire WI

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If the blades start to cone.. the links will bind.. and could break.

At high head speeds this is not an issue. At low speeds is when this head "style" can fail.

Grimracer
Michael J Zaborowski
Futaba USA
AMA 124909
IRCHA 5453
VARIO AND PEAK AIRCRAFT ROCK!
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04-24-2014 07:01 PM  6 years ago
JKos

rrProfessor

Redondo Beach, CA

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> What in the DFC head is causing the wobble?

Very stiff dampening required by the design so as not to break.

- John
RR rules!
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04-24-2014 09:13 PM  6 years ago
Grimracer

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Eau Claire WI

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Its been my experience that stiff dampening and scale heils are tricky to tune. The resonant caused by ridged rotor head can cause “odd issues” with a fuse hanging below the head.
I have woof and proofed TWO heils due to the head being to ridged, and flying with a higher head speed.
I don’t think anybody’s saying you cannot do this.. just proceed with caution. I can however say.. I will not fly a DFC head on my scales. The minor (looks?) are not worth the flight risk.. to me..

Keep us posted.

Grim
Michael J Zaborowski
Futaba USA
AMA 124909
IRCHA 5453
VARIO AND PEAK AIRCRAFT ROCK!
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04-24-2014 11:43 PM  6 years ago
flynbryan

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Long Island N.Y.

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DFC
I just can't like a 3 axis gyro. My fly bar set up flys perfect for my type of flying. I think the 3 axis gyro are perfect for 3D machines and I only do 3D on the sim It's cost affective..
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04-25-2014 01:20 PM  6 years ago
shawmcky

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Isle of Wight,United Kingdom

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Found this DFC on the tube.

Watch at YouTube

Team- unbiased opinion.K.I.S.S principle upheld here
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04-25-2014 01:24 PM  6 years ago
shawmcky

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Isle of Wight,United Kingdom

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Bit longer flight here!

Watch at YouTube

Team- unbiased opinion.K.I.S.S principle upheld here
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04-25-2014 02:32 PM  6 years ago
shawmcky

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Isle of Wight,United Kingdom

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Watch at YouTube

Team- unbiased opinion.K.I.S.S principle upheld here
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04-26-2014 04:29 PM  6 years ago
shawmcky

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Isle of Wight,United Kingdom

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As for my Ranger,i think i will go conventional flybarless on the gasser Thanks to everyone for their input,not keen on high head speed for this one.Team- unbiased opinion.K.I.S.S principle upheld here
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