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HomeScale✈️AircraftScale HeliScale Helicopter Main Discussion › 301CV formally 85LF
09-28-2020 01:59 PM  21 days ago
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bwellmaker

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Long Island

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301CV formally 85LF
Good morning gents.

I am sure most are aware 85LF has a “Class A” mishap at Dalton 20. Over the winter I upgraded the flex drive with shaft drive, upgraded servos and i stalled a Axon. The mishap occurred on the 26th flight after the upgrades.

After any maintenance or upgrades I will hover it once then inspect every change. Next a flight and do the same. If all is well will make 2 flights repeat then a few more, well you get the idea.

The failure point was the set screw that came loose holding the male articulate joint to the input shaft of the TGB that caused the lose of yaw control. During a low altitude high speed LH turn, lose of tail control caused the nose to rotate right that caused the heli to roll inverted and impact the ground above the LH co-pilot overhead.

This all happened so quickly there was no way possible to avoid a crash.

Some pics of the crash site.

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09-28-2020 02:13 PM  21 days ago
chopper37

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Great Narrative there Butch and the ntsb report, looking at the subject title do I see a Phoenix rising possibility?
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09-28-2020 02:26 PM  21 days ago
bwellmaker

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On the 14+ hour drive back to Zoo York, I had a lot of time to consider many options. Cut losses and move on, look at options for another fuse etc. Once I got home and began to look at the heli in detail and found it had some major damage but overall more than able to repair.

The major structure for the main gear and mechanics are sound however most of the forward fuse formers are damaged beyond repair. 3 of the 4 doors are in good shape and the upper cowlings need some work but not bad.

After looking everything over I have decided to repair this fuse and to put the experience I have gained over the past 14 years into my new subject.

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09-28-2020 02:31 PM  21 days ago
chopper37

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Wow that’s great news, I’ll be watching
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09-28-2020 02:37 PM  21 days ago
bwellmaker

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Long Island

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So here we go.

A “re-build” thread for my Sikorsky S-76. As I have a personal connection with the S-76 i simply can not see myself without a 76 in the hangar.

Some pics of the progress.

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09-28-2020 02:46 PM  21 days ago
chopper37

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Damn, that’s fast incredible work
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09-28-2020 03:04 PM  21 days ago
v22chap

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Granger, Indiana

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Way to go Butch ... glad you can get it back in the air . Hate that when you change something for the good and it turns to bite you !!! I did about the same thing with my V-22, upgraded and it bit me good last yr . But it lived to fly this yr at IRCHA !

May the rebuild be even better than the orginal , good luck and the main thing ... have fun doing it
Larry C ----------Bergen R/C helicopters
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09-28-2020 03:10 PM  21 days ago
Grimracer

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Eau Claire WI

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GO GO GO.. we are all cheering you on! Great work.

to me.. I would rather bring back an old machine then build a new some times. Its just nice to look back at the work and say.. yep.. that was good or nope.. not going to do that again!

Grim
Michael J Zaborowski
Futaba USA
AMA 124909
IRCHA 5453
VARIO AND PEAK AIRCRAFT ROCK!
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09-28-2020 03:12 PM  21 days ago
v22chap

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Me too Grim... Either way you learn something in the process !!!Larry C ----------Bergen R/C helicopters
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09-29-2020 12:23 AM  20 days ago
marc28

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new york

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💎Sustaining Member
Good to see you have decided to rebuild. I'm sure it will be awesomeEast Coast scale helicopter Field Rep
Vario Team Pilot
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09-29-2020 01:35 AM  20 days ago
Sleeper

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Cincinnati, Ohio, USA

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I know of the personal connection with the 76 is there a connection to 301CV? I can't wait to watch the build progress. Keep the photo's coming. Great tear down to find the fault. The NTSB is looking for a few good men.
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09-29-2020 11:57 AM  20 days ago
Copter Doctor

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

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N85LF
An aircraft barely repairable
Gentlemen, Butch can rebuild it, he has the experience, he has the know how to rebuild the worlds best looking S76. 8 lima Foxtrot will be that 76.
It will be better, stronger, Faster!
N301 Charlie Victor!
drive a rotary, fly a rotorcraft
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09-29-2020 01:03 PM  20 days ago
bwellmaker

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Long Island

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Good morning Gents,

I saw a helicopter mishap at an event last year that looked to be a total loss. I saw that machine fly again this year. That right there is some encouragement.

As most know, I have worked on Sikorsky products for 42 years mainly the 76 series. I worked on 85LF for 11 years from 08 until 19. In November of 19 a friend who worked on 301CV since new was retiring and looking for a replacement. I took that position the first of December.

I had planned on a repaint of LF to CV at some point to match the heli I maintain however due to circumstances beyond my control it will happen sooner. I just have to do a little touch up and most should buff out no problem. HA.

B
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09-29-2020 05:51 PM  19 days ago
cobieg

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Florida

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Butch, I was sorry to hear of your 76 going down. Glad to see that it will fly again. Sometimes crashes look far worse than they are. Anyone remember the Roban Jay Hawk that went down at the first Panama City event? Its much stronger now, lol. Anyway, cant wait to see more progress.

Ron
I didn't crash. I just ran out of airspeed, altitude, and ideas all at the same time!
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09-29-2020 08:10 PM  19 days ago
Notar

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Taxachussetts

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Much better color scheme as well. You should see that good.
Joe
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09-29-2020 09:03 PM  19 days ago
doorman

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Sherwood, Arkansas

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LOOKING GOOD ALREADY!!!
Glad to hear your able to bring it back to life!!!
No doubt that it will be better from everything you have learned from the original build.. will be following your progress....

Stan
AMA 2918-Team Spin Blades,,Castle Creations, Unique Aircraft
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HomeScale✈️AircraftScale HeliScale Helicopter Main Discussion › 301CV formally 85LF
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