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11-26-2017 01:27 AM  19 days agoPost 1
Copter Doctor

rrProfessor

Enterprise/ft.rucker ,al- home of army aviation

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Been working on an old vario fuselage (the older 60 size one) for about the last 7 years on and off. Finally I have been making good progress with the mechanics (century predator converted to electric) and have started to get some work on the fuselage moving forward.

drive a rotary, fly a rotorcraft

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11-26-2017 05:37 AM  19 days agoPost 2
HilliHeli

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S.MI./FL.

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Nice

!Antriebe, die bewegen!
Henseleit-Helicopters.de
Jazz', Jives & vbar's
Futaba FASST / FASSTest

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11-26-2017 02:24 PM  19 days agoPost 3
jbewley

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Fairfield, PA

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Wow!!

Jim

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11-26-2017 02:38 PM  19 days agoPost 4
chopper37

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NJ and Long Island

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Looking great there Emile, should be another show winner for sure.

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11-26-2017 03:09 PM  19 days agoPost 5
Copter Doctor

rrProfessor

Enterprise/ft.rucker ,al- home of army aviation

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Fenny

thanks all, yeah I am working on it.
The fennestron has been most challenging. I started out with a vario fenestron unit but as we know, they need to be sped up more than the std 5 to 1 ratio of the predator so it only worked somewhat decent when I ran the head speed up to ungodly and un scale like rpms. this was unacceptable so I experimented and build my own. while it isn't scale at only 5 blades and super wide, it worked with the std t/r ratio but only in pod n boom. when flown in the fuselage it had poor results. my next thing to do was to find a good reliable way to speed up the tr on the predator without having to speed up the main rotor. I never liked the idea of a separate motor and esc so that was out. a quick redesign of the t/r takeoff in the upper frames of the predator got me a 7.5 to one ratio and that my friend was enough to get the speeds to make the fenny work inside the fuselage. I may give the vario fenny another shot now that I have a higher rpm to work with. I've since changed from using the std predator t/r gearbox and am now using one from an old xcell 60. Its a much smaller, compact unit and the direction nof rotation can be easily changed.

drive a rotary, fly a rotorcraft

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11-26-2017 03:14 PM  19 days agoPost 6
chopper37

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NJ and Long Island

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Very ingenious design!

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11-26-2017 03:54 PM  19 days agoPost 7
Copter Doctor

rrProfessor

Enterprise/ft.rucker ,al- home of army aviation

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Thanks man.
as with most fuselages on the market, they have a few inaccuracies, some I can live with and some I cannot. the biggest flaw on vario's EC135 fuse was the top of the doghouse, all wrong so I went to work with the construction paper, some glass cloth and an empty box of cheez-its!

drive a rotary, fly a rotorcraft

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11-27-2017 12:09 PM  18 days agoPost 8
Notar

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Taxachussetts

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Cat litter boxes are stronger Emile.
Joe

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11-27-2017 01:09 PM  18 days agoPost 9
Copter Doctor

rrProfessor

Enterprise/ft.rucker ,al- home of army aviation

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Cat litter boxes are stronger Emile.

drive a rotary, fly a rotorcraft

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11-27-2017 01:31 PM  18 days agoPost 10
Grimracer

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Eau Claire WI

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Meeeeeeeee ---awwwwwwwwwwwwwwwwwwwwwwwwwwwwwww

Looking good man..

Grim

Michael J Zaborowski

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11-28-2017 01:42 AM  17 days agoPost 11
Copter Doctor

rrProfessor

Enterprise/ft.rucker ,al- home of army aviation

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flight of the fenny

A short clip of the fenestron in action. This was conducted in Roy's (Heli143) backyard on one of my visits to his place. My 12 year old daughter watching in the background.

Watch at YouTube

drive a rotary, fly a rotorcraft

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11-28-2017 02:06 AM  17 days agoPost 12
BillK

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CA

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Very nice work Emile!!

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11-28-2017 02:07 AM  17 days agoPost 13
ssmith512

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Indianapolis, IN USA

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Fenny for the win!

Nicely done.

Steve

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11-28-2017 03:54 AM  17 days agoPost 14
Copter Doctor

rrProfessor

Enterprise/ft.rucker ,al- home of army aviation

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In this video I overlooked installing the screw that keeps the tailrotor (fenestron) gearbox from backing out of the tailboom when I re installed the mechs in the fuselage and the flight was anything but uneventful. fortunately a bent pc rod and my pride was the only casualty. You may also hear my girlfriend expressing her anxiety as she recorded the event so my apologies in advance

Watch at YouTube

drive a rotary, fly a rotorcraft

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11-28-2017 02:24 PM  17 days agoPost 15
doorman

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Sherwood, Arkansas

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Great Save!!

Being somewhat of a pro when it comes to loosing the tail, because a screw missed the proper seat on my 34 (my fault both times!!!)
You did a great job getting her back on the ground!!!!
It looks like it is dialed in nicely and flying good... Just remember to do a pull test on the tail once you reinstall that pesky little BOLT!!!

Stan

AMA 2918-Team JR, Spin Blades, East Coast Scale Helicopter,Castle Creations

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11-28-2017 05:03 PM  17 days agoPost 16
Copter Doctor

rrProfessor

Enterprise/ft.rucker ,al- home of army aviation

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Thanks Stan, yea i know you've had your share of tail incidents that screw is checked for installation and tightness every time now.
When i redid the doghouse, it ended up with an inxrease in height which required a taller main mast so i grabbed a piece from my stock 10mm shaft supply and made a new one about an inch and a half longer to clear the top of the doghouse. This of course meant new pc links and a test flight to adjust pitch curve and tracking.

drive a rotary, fly a rotorcraft

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11-29-2017 12:26 AM  16 days agoPost 17
gologo

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Sedalia, Mo USA

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You may also hear my girlfriend expressing her anxiety as she recorded the event so my apologies in advance
I think her response was pretty 'spot on' for the circumstances....

And yes, nice flying clear to the end!

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11-29-2017 12:51 PM  16 days agoPost 18
jbewley

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Fairfield, PA

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Wow!! I don't think that I could fly and walk at the same time. Nice save:-)

The comment Doorman made about pulling on the tail gearbox is interesting. Part of the pre flight on the UH-1 was to climb up on the tail stinger and pull in and out on the tail rotor hub to be sure the amount of play was correct.

Jim

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11-30-2017 12:15 AM  15 days agoPost 19
Copter Doctor

rrProfessor

Enterprise/ft.rucker ,al- home of army aviation

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Wow!! I don't think that I could fly and walk at the same time
Thanks Jim,
I have to admit, I love doing (and showing off a little) what I like to call heli ballet. Its not as fancy as 3D but I love it when I go to airshows and see a full size heli put through its paces and I love doing it the best I can with a scale heli.
here is one of my favorite clips putting my marvelcraft 407 thru a round of ballet dancing.

Watch at YouTube

drive a rotary, fly a rotorcraft

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11-30-2017 02:01 AM  15 days agoPost 20
jbewley

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Fairfield, PA

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Beautifully done Doc. I too, like to see a scale helicopter flown scale and your dance was very nicely done. I was impressed with your skills at Dalton and even more so now.

Jim

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