---------------------------------------------------------- Yak-List Digest Archive --- Total Messages Posted Mon 02/21/11: 4 ---------------------------------------------------------- Today's Message Index: ---------------------- 1. 03:47 AM - Re: torque settings to lock blades (flyayak) 2. 04:25 AM - Re: Re: torque settings to lock blades (Eric Wobschall) 3. 05:54 AM - Re: Re: torque settings to lock blades (A. Dennis Savarese) 4. 10:04 AM - Re: Re: torque settings to lock blades (Walter Lannon) ________________________________ Message 1 _____________________________________ Time: 03:47:54 AM PST US Subject: Yak-List: Re: torque settings to lock blades From: "flyayak" Hi all, sorry, but now Im a bit confused. Is it 60 or 75 lb/ft (the last one seems really a bit high)? And by the way, the 6 nuts behind the prop flange should be tightened with 87 ft/lbs, right? Thanks a lot. Stefan Read this topic online here: http://forums.matronics.com/viewtopic.php?p=331696#331696 ________________________________ Message 2 _____________________________________ Time: 04:25:51 AM PST US Subject: Re: Yak-List: Re: torque settings to lock blades From: Eric Wobschall 87 is fine for the prop flange. be sure to use the proper calculation if you're using a dogbone extension, which you pretty much have to. Here's a calculator on the internet: http://www.belknaptools.com/extcalc.asp Looking around for the counterweight figure, and it is tight, but not that tight as I recall (more like 40). Plus, it's a castle nut, so you don't get it right on (could be up to 30 degrees to the closest increment). I'll post it if I can find it. On Feb 21, 2011, at 6:45 AM, flyayak wrote: > > Hi all, > > sorry, but now Im a bit confused. Is it 60 or 75 lb/ft (the last one seems really a bit high)? > And by the way, the 6 nuts behind the prop flange should be tightened with 87 ft/lbs, right? > > Thanks a lot. > > Stefan > > > > > Read this topic online here: > > http://forums.matronics.com/viewtopic.php?p=331696#331696 > > > > > > > > > > ________________________________ Message 3 _____________________________________ Time: 05:54:38 AM PST US From: "A. Dennis Savarese" Subject: Re: Yak-List: Re: torque settings to lock blades Yes, the torque spec I have for the prop flange nuts (22mm) is 87 ft/lbs. Dennis On 2/21/2011 5:45 AM, flyayak wrote: > --> Yak-List message posted by: "flyayak" > > Hi all, > > sorry, but now Im a bit confused. Is it 60 or 75 lb/ft (the last one seems really a bit high)? > And by the way, the 6 nuts behind the prop flange should be tightened with 87 ft/lbs, right? > > Thanks a lot. > > Stefan > > > Read this topic online here: > > http://forums.matronics.com/viewtopic.php?p=331696#331696 > > ________________________________ Message 4 _____________________________________ Time: 10:04:19 AM PST US From: Walter Lannon Subject: Re: Yak-List: Re: torque settings to lock blades Blade clamp (c'weight bracket) bolt/nut torque value is 57 to 63 lb/ft. Torque to approx 55 lb/ft then to next cotter pin hole if within torque limit. Torque values given for castelated nuts USUALLY allow for further tighening to line up the next hole. BUT------- Whether that is true of Russian/Chinese specs. I don't know! I would allow only a very smal overtorque.l Having the advantage of a few spare nuts I can usually get away with selective fitting. When that fails I guage the amount of turn required relative to the thread pitch and machine the nut base accordingly. This is arguably the MOST CRITICAL torque value on the entire engine/airframe combination. Walt. Walt ----- Original Message ----- From: "flyayak" Sent: Monday, February 21, 2011 3:45 AM Subject: Yak-List: Re: torque settings to lock blades > > Hi all, > > sorry, but now Im a bit confused. Is it 60 or 75 lb/ft (the last one > seems really a bit high)? > And by the way, the 6 nuts behind the prop flange should be tightened with > 87 ft/lbs, right? > > Thanks a lot. > > Stefan > > > Read this topic online here: > > http://forums.matronics.com/viewtopic.php?p=331696#331696 > > > ------------------------------------------------------------------------------------- Other Matronics Email List Services ------------------------------------------------------------------------------------- Post A New Message yak-list@matronics.com UN/SUBSCRIBE http://www.matronics.com/subscription List FAQ http://www.matronics.com/FAQ/Yak-List.htm Web Forum Interface To Lists http://forums.matronics.com Matronics List Wiki http://wiki.matronics.com Full Archive Search Engine http://www.matronics.com/search 7-Day List Browse http://www.matronics.com/browse/yak-list Browse Digests http://www.matronics.com/digest/yak-list Browse Other Lists http://www.matronics.com/browse Live Online Chat! http://www.matronics.com/chat Archive Downloading http://www.matronics.com/archives Photo Share http://www.matronics.com/photoshare Other Email Lists http://www.matronics.com/emaillists Contributions http://www.matronics.com/contribution ------------------------------------------------------------------------------------- These Email List Services are sponsored solely by Matronics and through the generous Contributions of its members.