---------------------------------------------------------- Yak-List Digest Archive --- Total Messages Posted Mon 09/28/15: 5 ---------------------------------------------------------- Today's Message Index: ---------------------- 1. 06:25 AM - Compressor Couplings (George S. Coy) 2. 08:11 AM - Re: Stuck wheel (billvh@ca.rr.com) 3. 08:20 AM - Re: Re: Stuck wheel (A. Dennis Savarese) 4. 08:25 AM - Re: Re: Stuck wheel (Phil Salter) 5. 07:21 PM - Yak 55M - Airspeeds for safe opening of canopy (Royden Heays) ________________________________ Message 1 _____________________________________ Time: 06:25:30 AM PST US From: "George S. Coy" Subject: Yak-List: Compressor Couplings Some information on air compressor shear couplings: The original shear pins are made from 12Cr18Ni10T (Russian alloy). It is a stainless steel similar with 321 (USA alloy). During the manufacturing process a coupling from each batch is shear tested. The shear torque has to be 15 Kgf-m (108 lbf-ft) for couplings with pins with 3 millimeters on diameter (first serial engines) and 22Kgf-m (159 lbf-ft) for couplings with pins with 3.5 millimeters on diameter (second serial engines). We strongly recommend using pins from the genuine steel or equivalents according to STAHLSLUSSEL catalogue. If during start or shut down, the engine runs for few revolutions backward then important dynamic stress occurs and it is possible shearing the pins (the purpose of this shear coupling is to protect the engine gears). If the start and the shutdown of the engine are normal then the main cause is the too high temperature of the cylinder of the compressor during the flight or the too high temperature of the oil (the compressor is lubricated under pressure from the oil system of the engine). It is necessary to check the cooling system of the compressor and the cooling system of the oil. It is recommended also to replace with a new one the fabric air filter of the air compressor. George Coy CAS Ltd. 629 Airport Rd. Swanton VT 05488 USA 802-868-5633 off 802-363-5782 cell 802-868-6632 Fax george.coy@gmail.com http://coyacft.com/ SKYPE george.coy ________________________________ Message 2 _____________________________________ Time: 08:11:26 AM PST US Subject: Yak-List: Re: Stuck wheel From: "billvh@ca.rr.com" Thanks Dennis. CRC makes a product called freeze and lube or something like that which I tried but was unable to get the axle cold enough to do the trick. And there was a double tang thick washer under the wheel nut. I have no idea why the folks at Termikas would tighten the nut to that extreme. My next move is what Gary CJ N22YK suggested. It was going to be my next try but I thought I might get something off the list first. Bill dsavarese0812(at)bellsout wrote: > Sounds like someone seriously over torqued the wheel nut and very possibly damaged/crushed the bearings. Was there a washer behind the nut and in front of the cup? If not, that is probably why the wheel nut was over torqued; to take up the space because of the missing washer. > Try spraying the bearing with freezing type spray. You may try an electronics freezing spray or you could even try a can of the cheapest freon available at the auto supply store. > Dennis > > Sent from my iPhone > > > > On Sep 27, 2015, at 6:04 PM, "billvh@ca.rr.com" wrote: > > > > > > > > Trying to get the wheels off a 50 I'm working on. No amount of pounding on the tire will get either wheel to budge. (Yes I took off the nuts and washer.) > > The backing plate is too thin to pry against. Anyone got a trick or special technique or tool to get the bearing to let go of the axle? BTW it took a 24 inch Johnson bar to get the nuts off. > > > > > > > > > > Read this topic online here: > > > > http://forums.matronics.com/viewtopic.php?p=447489#447489 > > > > > > > > > > > > > > > > > > > > > > > > > Read this topic online here: http://forums.matronics.com/viewtopic.php?p=447504#447504 ________________________________ Message 3 _____________________________________ Time: 08:20:07 AM PST US From: "A. Dennis Savarese" Subject: Re: Yak-List: Re: Stuck wheel You may try freezing the bearing too.Dennis From: "billvh@ca.rr.com" To: yak-list@matronics.com Sent: Monday, September 28, 2015 10:08 AM Subject: Yak-List: Re: Stuck wheel Thanks Dennis. CRC makes a product called freeze and lube or something like that which I tried but was unable to get the axle cold enough to do the tr ick. And there was a double tang thick washer under the wheel nut. I have n o idea why the folks at Termikas would tighten the nut to that extreme. My next move is what Gary=C2- CJ N22YK suggested. It was going to be my next try but I thought I might get something off the list first. Bill dsavarese0812(at)bellsout wrote: > Sounds like someone seriously over torqued the wheel nut and very possibl y damaged/crushed the bearings.=C2- Was there a washer behind the nut and in front of the cup?=C2- If not, that is probably why the wheel nut was over torqued; to take up the space because of the missing washer. > Try spraying the bearing with freezing type spray. You may try an electro nics freezing spray or you could even try a can of the cheapest freon avail able at the auto supply store. > Dennis > > Sent from my iPhone > > > >=C2- On Sep 27, 2015, at 6:04 PM, "billvh@ca.rr.com"=C2- wrote: > >=C2- > >=C2- > >=C2- > >=C2- Trying to get the wheels off a 50 I'm working on. No amount of po unding on the tire will get either wheel to budge. (Yes I took off the nuts and washer.) > >=C2- The backing plate is too thin to pry against. Anyone got a trick or special technique or tool to get the bearing to let go of the axle? BTW it took a 24 inch Johnson bar to get the nuts off. > >=C2- > >=C2- > >=C2- > >=C2- > >=C2- Read this topic online here: > >=C2- > >=C2- http://forums.matronics.com/viewtopic.php?p=447489#447489 > >=C2- > >=C2- > >=C2- > >=C2- > >=C2- > >=C2- > >=C2- > >=C2- > >=C2- > >=C2- > > > > > Read this topic online here: http://forums.matronics.com/viewtopic.php?p=447504#447504 S - - =C2- =C2- =C2- =C2- =C2- -Matt Dralle, List Admin. ________________________________ Message 4 _____________________________________ Time: 08:25:10 AM PST US From: Phil Salter Subject: Re: Yak-List: Re: Stuck wheel Securities offered through Summit Brokerage Services Inc., Member FINRA, SIP C. Advisory services offered through Summit Financial Group Inc., a Register ed Investment Advisor. Sent from my IPad. > On Sep 28, 2015, at 10:17 AM, A. Dennis Savarese wrote: > > You may try freezing the bearing too. > Dennis > > From: "billvh@ca.rr.com" > To: yak-list@matronics.com > Sent: Monday, September 28, 2015 10:08 AM > Subject: Yak-List: Re: Stuck wheel > > > Thanks Dennis. CRC makes a product called freeze and lube or something lik e that which I tried but was unable to get the axle cold enough to do the tr ick. And there was a double tang thick washer under the wheel nut. I have no idea why the folks at Termikas would tighten the nut to that extreme. My ne xt move is what Gary CJ N22YK suggested. It was going to be my next try but I thought I might get something off the list first. > Bill > > > dsavarese0812(at)bellsout wrote: > > Sounds like someone seriously over torqued the wheel nut and very possib ly damaged/crushed the bearings. Was there a washer behind the nut and in f ront of the cup? If not, that is probably why the wheel nut was over torque d; to take up the space because of the missing washer. > > Try spraying the bearing with freezing type spray. You may try an electr onics freezing spray or you could even try a can of the cheapest freon avail able at the auto supply store. > > Dennis > > > > Sent from my iPhone > > > > > > > On Sep 27, 2015, at 6:04 PM, "billvh@ca.rr.com" wrote: > > > > > > > > > > > > Trying to get the wheels off a 50 I'm working on. No amount of poundi ng on the tire will get either wheel to budge. (Yes I took off the nuts and w asher.) > > > The backing plate is too thin to pry against. Anyone got a trick or s pecial technique or tool to get the bearing to let go of the axle? BTW it to ok a 24 inch Johnson bar to get the nuts off. > > > > > > > > > > > > > > > Read this topic online here: > > > > > > http://forums.matronics.com/viewtopic.php?p=447489#447489 > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > Read this topic online here: > > http://forums.matronics.com/viewtopic.php?p=447504#447504k-List" target= "_blank">http://www.matronics.com/Navigator?Yak-Listhttp://forums.mat &nbs//www.matronics.com/contribution" target="_blank">http:/ /www.matronics.co================= > > > > > > > 3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3 D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D 3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3 D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D 3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3 D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D 3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3 D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D > ________________________________ Message 5 _____________________________________ Time: 07:21:27 PM PST US From: "Royden Heays" Subject: Yak-List: Yak 55M - Airspeeds for safe opening of canopy For the Yak 55M, does anyone have the airspeed below which it is safe to open the canopy without damaging it? There are two canopy open positions. One around 6 inches open and another fully open for entry and egress to/from the cockpit. Perhaps there are two airspeeds, one for 6" open and another for fully open? Does anyone have experience with flying canopy open that they are prepared to share? Comments welcome on cockpit air turbulence, through cockpit airflow and pressure. Did your maps get sucked out, for example? Royden Heays, Vancouver, Canada ------------------------------------------------------------------------------------- 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.