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Home✈️Aircraft🚁HelicopterHIROBOOther › Different Head mechanics?
08-01-2007 03:56 PM  13 years ago
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blt4ice

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Newark, DE

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Different Head mechanics?
Caught these pictures from the post from Poland and was quite curious about these three shots of what seems to be a Freya head. So what is this contraption?

Brian
Heli tools used: Torch, Pipe Wrench, 4 ft. crowbar
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08-01-2007 04:05 PM  13 years ago
hootowl

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Garnet Valley, Pa.

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And what's up with the black foam in the canopy?Wolves don't lose sleep over the opinions of sheep
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08-01-2007 04:25 PM  13 years ago
blt4ice

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Newark, DE

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Hopefully Jeff can shed some light.Brian
Heli tools used: Torch, Pipe Wrench, 4 ft. crowbar
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08-01-2007 04:29 PM  13 years ago
mpafonseca

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Savannah, GA - USA

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Looking the mechanism you can see that when you increase the head speed the bell-hiller lever mass will make the mechanism to open and increase the flybar ratio. So, it looks like a stability variation as function of head speed. Anyway I´m just guessing. Maybe someone can talk to Mr. Rudiger Feil that is flying that Freya at the F3C world champs.... I guess that the foam is to reduce the canopy vibration and noise

Marco
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08-01-2007 04:34 PM  13 years ago
hootowl

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Garnet Valley, Pa.

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Looks like a gonkulator to meWolves don't lose sleep over the opinions of sheep
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08-01-2007 04:35 PM  13 years ago
MRC-Hirobo

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Edison, NJ

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That is Rudiger Feil's test idea for variable mixing ratio usage. As I understand, in hover the ratios are more suitable for hovering stability and then in FFF, the ratios favor agility for the new maneuver requirements.

The black foam is a deadening material placed inside the cabin to cut resonance and make the heli "sound" better.

jeff
MRC Host
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08-01-2007 04:39 PM  13 years ago
blt4ice

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Newark, DE

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Awesome idea. Can't wait to see a production version Brian
Heli tools used: Torch, Pipe Wrench, 4 ft. crowbar
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08-01-2007 05:19 PM  13 years ago
Havoc

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Ky.

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It helps keep the overly curious away. That little springs flicks into your eye if you touch any of the bling.
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08-01-2007 06:06 PM  13 years ago
ErichF (RIP)

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Sutton, NH

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Read this thread:

http://runryder.com/t358537p1/

The foam inside the canopy is to quiet the sound down a bit.

Erich
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08-05-2007 10:30 PM  13 years ago
pschurter

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La Serena - Chile

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I just don't like the idea of a spring spinning there.... it scares me.... Good flight, good night!
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08-06-2007 07:19 AM  13 years ago
vfastr6

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Cape Town, RSA

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The black foam is what most F3C pilots use to keep gear and engine noise down. It's self-adhesive and works a treat - part number 2513-064. Comes in 500x480mm sheet.

Cheers
Marc
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08-06-2007 01:15 PM  13 years ago
blt4ice

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Newark, DE

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Do you clean the foam or just rip it off and place in some new stuff when it gets all oiled up?Brian
Heli tools used: Torch, Pipe Wrench, 4 ft. crowbar
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08-06-2007 02:45 PM  13 years ago
Henrik Engert

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Cedar Park, TX

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Do you clean the foam or just rip it off and place in some new stuff when it gets all oiled up?
Normally does not tend to get oiled up. My F3C machine does not get greasy at all in that area, it barely gets greasy at all.

Rudiger told us at the WC in Poland that the rotor head sometimes is almost too stable, that is why he put the spring there to make the head less stable in forward flight. He said he can feel the difference 100%.
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08-06-2007 03:51 PM  13 years ago
chris24g

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Hayward, CA

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Simple, yet innovative. One of those "why didn't I think of that" designs. Let's take bets to see who knocks it off first... I'd go first, but I don't want to "malign" anyone in particular.
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