Sundowner.pl Posted May 17, 2008 Posted May 17, 2008 Something that may become useful... someday. How to prevent Mast Bumping in UH-1 and AH-1 (and Bell 47, 206, Robinsons, etc. ): US Army TF 46-6229 :pilotfly: 2 [sIGPIC][/sIGPIC] "If a place needs helicopters, it's probably not worth visiting." - Nick Lappos
mvsgas Posted May 17, 2008 Posted May 17, 2008 Oh no military training videos.... I hate those :( haaa :D To whom it may concern, I am an idiot, unfortunately for the world, I have a internet connection and a fondness for beer....apologies for that. Thank you for you patience. Many people don't want the truth, they want constant reassurance that whatever misconception/fallacies they believe in are true..
Vekkinho Posted May 17, 2008 Posted May 17, 2008 LOL! Reminds me of M.A.S.H.! But they shoulda keep Alan Alda as narrator! [sIGPIC][/sIGPIC]
AlphaOneSix Posted May 17, 2008 Posted May 17, 2008 I don't think mast bumping is possible on a fully-articulated rotor system...but you can have droop stop pounding!
Rhino4 Posted May 18, 2008 Posted May 18, 2008 I can't believe I just watched that...I complain all the time about having to watch videos like that during training and then I sit here like an idiot and watch one for twenty minutes while wondering if this "mast bumping" is even possible in a ka-50... 1
Sundowner.pl Posted May 18, 2008 Author Posted May 18, 2008 No, it is not possible in Ka-50, AH-64 or most other attack helicopters. As I said, it may become useful someday, when someone make flyable AH-1 sim :music_whistling: Plus if someone is going for a joy ride in Bell 206, or Robinson R22/44, he now know what to avoid ;) [sIGPIC][/sIGPIC] "If a place needs helicopters, it's probably not worth visiting." - Nick Lappos
Geier Posted May 18, 2008 Posted May 18, 2008 LOL! Reminds me of M.A.S.H.! But they shoulda keep Alan Alda as narrator! Same here:D:thumbup: Do you remeber that corporal with glasses. They called him "radar" ))) Nice film)
mvsgas Posted May 18, 2008 Posted May 18, 2008 I can't believe I just watched that...I complain all the time about having to watch videos like that during training and then I sit here like an idiot and watch one for twenty minutes while wondering if this "mast bumping" is even possible in a ka-50... :D That is funny and so true. I do the same. I hate all those outdated stupid videos. Working on explosive laden aircraft, Halon 1301 fire extinguisher, egress safety, wire harness chaffing awareness, aircraft composites, etc. I hate all dose training videos and here I am, watching one now on my off time. I'm such a dork,:lol::joystick::pilotfly: To whom it may concern, I am an idiot, unfortunately for the world, I have a internet connection and a fondness for beer....apologies for that. Thank you for you patience. Many people don't want the truth, they want constant reassurance that whatever misconception/fallacies they believe in are true..
CAT_101st Posted May 18, 2008 Posted May 18, 2008 I feal better now I only watched 5 minuts of it and stoped.:huh: Home built PC Win 10 Pro 64bit, MB ASUS Z170 WS, 6700K, EVGA 1080Ti Hybrid, 32GB DDR4 3200, Thermaltake 120x360 RAD, Custom built A-10C sim pit, TM WARTHOG HOTAS, Cougar MFD's, 3D printed UFC and Saitek rudders. HTC VIVE VR. https://digitalcombatmercenaries.enjin.com/
sofrash25 Posted May 18, 2008 Posted May 18, 2008 hoooolllyyyyyyyyy helll... 6 seconds into that I wanted to slit my wrists... omg... memories... hate... osidhfodihfsodifhsdiougf
joey45 Posted May 18, 2008 Posted May 18, 2008 No, it is not possible in Ka-50, AH-64 or most other attack helicopters. As I said, it may become useful someday, when someone make flyable AH-1 sim :music_whistling: Plus if someone is going for a joy ride in Bell 206, or Robinson R22/44, he now know what to avoid ;) the rotor disc moved on older heli's. What happens now is that the rotors move independently from the disc. The only way to make sense out of change is to plunge into it, move with it, and join the dance. "Me, the 13th Duke of Wybourne, here on the ED forums at 3 'o' clock in the morning, with my reputation. Are they mad.." https://ko-fi.com/joey45
Vekkinho Posted May 18, 2008 Posted May 18, 2008 But those scale models look pretty! [sIGPIC][/sIGPIC]
Canada Posted May 19, 2008 Posted May 19, 2008 If this video is addressed to active pilots, shouldn't there be a lot less explanations of basic theory ? Or do they want their audience to fall asleep ? Helicopters fly.
Sundowner.pl Posted May 19, 2008 Author Posted May 19, 2008 This is the absolute minimum of theory needed to fully understand the concept. How would you cut it shorter ? [sIGPIC][/sIGPIC] "If a place needs helicopters, it's probably not worth visiting." - Nick Lappos
predaeus Posted May 20, 2008 Posted May 20, 2008 Thanks for bringing up the topic of mast bumping up. I didn't know what it was and also knew hardly anything about how rotors and rotor heads function. Looking on the web a bit had my knowledge fixed and also extended. There is also some cool videos to find (no mast bumpings): Rotor head mechanics test: Rotor blade design and slow motion of blade tip flapping movement http://youtube.com/watch?v=SjFSt4Msde0 Slow motion of blade tip flapping movement
sobek Posted May 20, 2008 Posted May 20, 2008 Rotor head mechanics test: Rotor blade design and slow motion of blade tip flapping movement http://youtube.com/watch?v=SjFSt4Msde0 Slow motion of blade tip flapping movement Very much appreciated. Thanks for the find. Good, fast, cheap. Choose any two. Come let's eat grandpa! Use punctuation, save lives!
Mugatu Posted May 20, 2008 Posted May 20, 2008 ahhh I remember mast bumping, that was before we had a baby hehehe
swepain Posted May 20, 2008 Posted May 20, 2008 LOL! Reminds me of M.A.S.H.! But they shoulda keep Alan Alda as narrator! hah,, i got a "Magnum pi" feel of it.. fun to watch (havent seen any in a classroom) :D It takes a fool to remain sane :huh:
EagleEye Posted May 21, 2008 Posted May 21, 2008 ahhh I remember mast bumping, that was before we had a baby hehehe :megalol: Interesting vid`s though. Deutsche DCS-Flughandbücher SYSSpecs: i7-4790K @4GHz|GA-Z97X-SLI|16GB RAM|ASUS GTX1070|Win10 64bit|TrackIR5|TM Warthog/Saitek Pro Pedals
RedTiger Posted May 23, 2008 Posted May 23, 2008 I'm a dummy because I watched that entire thing and I still don't know what the hell they're talking about. :huh:
CobraDriver Posted May 23, 2008 Posted May 23, 2008 Red Tiger, your not a dummy. Fair question with a simple answer. Well sort-of. Exessive control inputs to the cyclic or flying in negative G's (lowering the collective quickly thus causing a flloating feeling) may cause Mast bumping. SO what THAT is, is the hub (connects the blades to the main mast) makes contact with the main mast. The main mast is hollow and simply may cut it, if not on the surface which is bad enough, it may sever it completely. Now another problem which I think is equal or worse, is that now that you have taken away pendular action from the main rotor (the weight that was hanging under the blades) the tail rotor is still providing a lateral thrust. So now you are not only weightles, possibly doing damage to the main mast but you are also spinning uncontrollably. Hope this clears it up some. Simple fix though, you know you'll be imparting negative G's cause your planning on doing a dive for "X" reason. SO the fwd cyclic input won't be abrupt, excessive and you'll be feeling for mushiness in the pedals. If ANY of those situations arise, apply aft cyclic to reload the main rotor system. Now go out and have some fun this weekend in your local Huey:thumbup::thumbup: Pugnare Fornicare Au Mort
RedTiger Posted May 23, 2008 Posted May 23, 2008 That clears it up. I was watching that video and trying to visualize what was bumping what.
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