Yak-List Digest Archive

Fri 05/02/08


Total Messages Posted: 17



Today's Message Index:
----------------------
 
     1. 07:56 AM - Prop's (CJcanuck)
     2. 08:35 AM - Re: Prop's (Terry Lewis)
     3. 09:13 AM - Re: Prop's (Cpayne)
     4. 09:31 AM - Re: Prop's (Walter Lannon)
     5. 10:00 AM - L/D (Barry Hancock)
     6. 10:18 AM - L/D redux (Jerry Painter)
     7. 10:26 AM - Fw: L/D (Jerry Painter)
     8. 10:34 AM - Fw: L/D redux (Jerry Painter)
     9. 11:25 AM - Re: Re: Glide speed and carrier approaches ()
    10. 11:36 AM - Re: Prop's (Bitterlich, Mark G CIV Det Cherry Point, MALS-14 64E)
    11. 11:53 AM - Re: Prop's (Bill Tally)
    12. 12:48 PM - Re: Fw: L/D redux (Jerry Painter)
    13. 03:37 PM - Re: Fw: L/D (Budd Davisson)
    14. 04:14 PM - Re: L/D (Brian Lloyd)
    15. 04:23 PM - Re: Re: Glide speed and carrier approaches (Brian Lloyd)
    16. 07:21 PM - Re: Prop's (Walter Lannon)
    17. 07:55 PM - Lone Star Red Star (Jon Boede)
 
 
 


Message 1


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    Time: 07:56:54 AM PST US
    Subject: Prop's
    From: "CJcanuck" <m_kirk69@hotmail.com>
    Hey All! I've just reinstalled my prop after having it overhauled and repainted. After shutting down from the first run we had a small amount of grease running down each prop blade from the hub The flow is symmetrical as far as I can tell. Having brand new seals and all I'm wondering if this is 'normal' or if there are other issues at work here. On a related issue, I'm keen to contact the company in Australia that is selling the prop spinners and some of the speed mods. Anyone have contact info? Thanks! Mike Kirk Read this topic online here: http://forums.matronics.com/viewtopic.php?p=180682#180682


    Message 2


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    Time: 08:35:19 AM PST US
    From: "Terry Lewis" <talew@bellsouth.net>
    Subject: Re: Prop's
    A couple of questions? 1)What kind of prop? 2) Is the grease on the blade really grease or is it engine oil? Terry Lewis ----- Original Message ----- From: "CJcanuck" <m_kirk69@hotmail.com> Sent: Friday, May 02, 2008 10:51 AM Subject: Yak-List: Prop's > > Hey All! > > I've just reinstalled my prop after having it overhauled and repainted. > After shutting down from the first run we had a small amount of grease > running down each prop blade from the hub The flow is symmetrical as far > as I can tell. Having brand new seals and all I'm wondering if this is > 'normal' or if there are other issues at work here. > > On a related issue, I'm keen to contact the company in Australia that is > selling the prop spinners and some of the speed mods. Anyone have contact > info? > > Thanks! > > Mike Kirk > > > Read this topic online here: > > http://forums.matronics.com/viewtopic.php?p=180682#180682 > > >


    Message 3


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    Time: 09:13:50 AM PST US
    From: Cpayne <cpayne@joimail.com>
    Subject: Re: Prop's
    Assuming you have the paddle blage prop, sounds like a normal situation following re-greasing. A certain amount of grease, smeared inside, is going to be thrown out for the first few hours. Be concerned that a blade seal is not seated if it lasts longer than that. Crai Payne


    Message 4


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    Time: 09:31:25 AM PST US
    From: Walter Lannon <wlannon@persona.ca>
    Subject: Re: Prop's
    That could be a normal condition after overhaul if excess grease was left outside of the blade seal area. Clean it and recheck. Is it both blades? If it continues you need to know whether it is grease or oil. Oil can only come from the pitch change unit or transfer tube and will initially show up leaking from the front of the hub at the "spinner" cap. Eventually it will fill the hub, dilute the grease and leak past the grease seals. The usual source is the two pitch change seals which would be replaced at overhaul. Who did your overhaul? Walt ----- Original Message ----- From: "CJcanuck" <m_kirk69@hotmail.com> Sent: Friday, May 02, 2008 7:51 AM Subject: Yak-List: Prop's > > Hey All! > > I've just reinstalled my prop after having it overhauled and repainted. > After shutting down from the first run we had a small amount of grease > running down each prop blade from the hub The flow is symmetrical as far > as I can tell. Having brand new seals and all I'm wondering if this is > 'normal' or if there are other issues at work here. > > On a related issue, I'm keen to contact the company in Australia that is > selling the prop spinners and some of the speed mods. Anyone have contact > info? > > Thanks! > > Mike Kirk > > > Read this topic online here: > > http://forums.matronics.com/viewtopic.php?p=180682#180682 > > >


    Message 5


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    Time: 10:00:00 AM PST US
    From: Barry Hancock <bhancock@worldwidewarbirds.com>
    Subject: L/D
    On May 1, 2008, at 11:58 PM, Yak-List Digest Server wrote: > 1) In a prior post, it was stated "stall speed increases with angle > of bank." > Well, not really. We should all become students of the V-G > diagram. Stall speed > increases with increased load factor. It happens that load factor > increases > with angle of bank. Right....and it was my post you're referring to. Just to be clear, from a practical standpoint if you are in the pattern (low airspeed already) with a high bank angle (created by being too close on downwind as was the scenario I presented) and you need to react to something out of the ordinary or just plain overshoot centerline and decide to pull on the stick (increased load) to "correct" the situation, you've just entered the aviation version of "dead man's curve"... Of course this is all basic airmanship and L/D is what we're specifically talking about, but unless you have an AOA in your airplane I don't think most people are going to be calculating reserve lift on short final. Like I said, some people are mechanical fliers, some people are feel fliers (referring to VFR, of course). Hopefully, however, we can all feel the Yak/CJ approaching departed flight without ever looking at an instrument... > However, in some banked flight regimes, such as banked > descending flight, the load factor may not increase. Or 110 degrees of bank in a wing over... ;) Cheers, Barry


    Message 6


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    Time: 10:18:59 AM PST US
    From: "Jerry Painter" <wild.blue@verizon.net>
    Subject: L/D redux


    Message 7


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    Time: 10:26:50 AM PST US
    From: "Jerry Painter" <wild.blue@verizon.net>
    Subject: Fw: L/D
    I posted this yesterday, but for some reason it didn't show up on list, only the header, so here it is again. JP -------Original Message------- From: Jerry Painter Subject: L/D This is an interesting discussion. Let's see if I can make some waves, just for fun. You can follow the same flight path power on/off flaps up/down etc. by simply varying speed and drag. Power, speed, drag and flight path are all interdependent variables--the Fab Four in the L/D equation. T-Crafts, Cherokees, CJ's, -52's, 747's et al. I have to say I've never quite understood what makes folks think that when you enter the pattern the airplane suddenly becomes more likely to have an engine failure than while en route, ergo power-off approaches, but that's another discussion. I fly over mountains/water all the time. Yes, I understand that first power reduction is the mostly likely time for engine failure, so take your time about that, but we're talking approaches. I dare say "nobody," wannabees or otherwise, "normally" makes power-off approaches in typical military or civilian trainer, fighter or transport aircraft, feet wet or dry, recip or turbine, though I'm sure there are exceptions (emergency/practice), but, hey I'm just a civilian. The X-15 had a near 1:1 l/d, I expect the Shuttle isn t much better, most of the approach is less than that. In any case, there's no point in slowing to best L/D or pulling the power off until you've got the runway made, X-15 or otherwise--we're not talking timed approaches are we? The only time speed really matters is on touchdown. Budd is absolutely right about the need to fit into the flow, like it or not--cutting others off isn't just bad manners, its dangerous. At the home drome, KAWO, on those occasional sunny and even usual rainy days we have to mix it up with various civilian single/multi/turbines, helicopters (what makes them want to land/autorotate on the runways and taxiways inquiring minds want to know, SSH is--for the better--gone, but, apparently, not forgotten), gliders, ultralights, RV 360 gaggles, overlapping patterns left, right, parallel and diagonal plus the odd P-47, Me-109 (thank you, Paul Allen), Apha Jet/L-39 and usual bizjets, practice ILS against the flow with missed right through the downwind (tho not in the procedure). And once in a while the Navy drops by in a P-3 for good measure, tho no B-1's or -2's, yet. Constant speed power-off 60mph approaches in your J-3 or power-off manhole cover in your Pitts ainna gonna cut it for spacing, 360 or otherwise, no hurry for combat turnaround. Plus, as Barry says, if you're making a 60 degree bank be sure you keep the speed up because the stall just went to 1 4Vso. The only good thing about a 45 degree bank in the pattern is max rate of turn for altitude lost, so its good for that (absolutely necessary?) 180 back to the patch, but the stall goes up to 1.2Vso, so keep the speed up then, too. And mid-airs ain't no fun, neither. The ILS is 3 degrees (20:1) for good reason, but not many of us can do it power-off. Emergencies ain't standard procedure. Jerry Painter CFI, A&P, Chief pilot, airport bum, permanent latrine orderly & c. Wild Blue Aviation 425-876-0865 wild.blue@verizon.net www.FlyWBA.com


    Message 8


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    Time: 10:34:54 AM PST US
    From: "Jerry Painter" <wild.blue@verizon.net>
    Subject: Fw: L/D redux
    Re-formatted just in case. Take two. -------Original Message------- From: Jerry Painter Subject: L/D redux Another factor that can play a big role is that many M-14 powered aircraft have MT, Whirlwind and other 3-blade props that become very effective airbrakes when pushed to high rpm at low power. I was reminded of this yesterday flying with Jim Bourke, owner of RC Groups.com, in his Yak-54 (formerly owned by Eric Beard and known on the airshow circuit as Russian Thunder). It has an MT. Jim likes to fly a "high-speed" (200-225 kph or so, all the way to flare), close-in pattern, giving him better visibility, then as he begins to flare he simply pushes the prop up to high rpm, followed by reduced throttle. It's like flying into a big bowl of mush. The airplane screeches to a halt, squats and lands. I've occasionally used this technique myself, traffic permitting. The huge drag of the prop gives huge control of speed at a moment's notice. If nothing else its a fun technique and keeping the speed up on final can only be a good thing safety-wise. Not exactly your typical (though it could be, in fact not a bad idea) practice "emergency" landing technique, high, fast and steep. Not sure about MT's, but Whirlwinds go high pitch with lost oil pressure. There aren't many geared flat (or round) engines around any more and I've read about alleged problems pilots of geared T-Bones and Commanders had with reverse-loading of their engines, though I'm not sure "reverse-loading" is actually happening, and its very short term during flare in any case. Anyone have anything to offer on the subject re M-14's? Facts, not conjecture and old-wives tales, please. Some of you old bomber pilots must have some info on Pratts and Wrights, no? On another subject, the -54 has very pronounced roll-coupling with rudder, even though the rudder tapers significantly, with most of the area down low. Not having much experience with big-rudder-optimized-for-gyros aerobatic airplanes (like "none"), I'm wondering whether this is common and if it may have contributed to some of the -54 "odd quirks" and "killer" stories, in that that one was apparently spun in in Alaska (I understand it was the only other -54 in the US). I didn't get much chance to explore it and its (way) beyond my skill set anyway, but its a bit surprising to have the airplane roll opposite rudder input, I.e., skid right and the left wing drops a bunch A big help for some tumbling maneuvers no doubt, but may make some typical maneuvers (like say, slips) and, especially, recovery techniques a bit odd if not plain inappropriate. BTW, Eric and Bud Granley are the only people I've seen hover an airplane (Bud in his -55, preferably while inverted, flying formation with a helicopter at very, very low altitude), though it may be common now. Didn't get a chance to try it myself, but would love to one fine day. Jerry Painter Wild Blue Aviation 425-876-0865 wild.blue@verizon.net www.FlyWBA.com


    Message 9


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    Time: 11:25:55 AM PST US
    From: <scott.glaser@thedefiantcompany.com>
    Subject: Re: Glide speed and carrier approaches
    I recently had some friends going for their PPL and we had a similar discussion regarding traffic patterns. When I was learning my instructor bordered on being physically abusive if I was not within gliding distance of the runway anytime after being established on downwind. Several of my friends who are currently working on or have recently received their PPL looked at me with a blank stare when I asked about this technique. Awareness of engine out gliding distance in the pattern wasn't even taught. They did of course practice engine outs but that was merely practice for off field situation. They said their instruction was focused on quality of their pattern and setting up their approach. It was taught very much from the airline pilot perspective. It was kind of disturbing if you ask me, but then again it's not how I was raised. S -----Original Message----- From: owner-yak-list-server@matronics.com [mailto:owner-yak-list-server@matronics.com] On Behalf Of Craig Winkelmann, CFI Sent: Thursday, May 01, 2008 10:30 PM Subject: Yak-List: Re: Glide speed and carrier approaches OK, ponder these items: 1) In a prior post, it was stated "stall speed increases with angle of bank." Well, not really. We should all become students of the V-G diagram. Stall speed increases with increased load factor. It happens that load factor increases with angle of bank. However, in some banked flight regimes, such as banked descending flight, the load factor may not increase. 2) At a controlled field, controllers will typically put an overhead break approach 500 feet above the normal pattern altitude for single engine piston aircraft. This is in the operations manual for air traffic control. 3) The AIM provides info on the traffic pattern. The "recommended" pattern is rectangular with left turns. This pattern is mostly a safety of flight pattern. It allows a pilot to get wings level before reconfiguring the aircraft (flaps, gear, change power, etc). It also allows for a visual check of where the runway is (high wing planes) and allows a look at the final approach corridor (remember, if there is an instrument approach for the runway you are landing on, there may be instrument traffic flying an approach and not talking on your frequency yet). Also, you will note the names of the legs are designed for position reporting. The only items in "key traffic pattern operations" is to fly downwind at pattern altitude (unless otherwise instructed by a controller) and to complete the turn to final at least 1/4 mile before the runway. Given this, the continuous turn to final does not conflict with the AIM. Craig Read this topic online here: http://forums.matronics.com/viewtopic.php?p=180616#180616


    Message 10


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    Time: 11:36:05 AM PST US
    Subject: Prop's
    From: "Bitterlich, Mark G CIV Det Cherry Point, MALS-14 64E" <mark.bitterlich@navy.mil>
    Not sure whether the CJ is identical to the M-14 in this regard, but on the latter, there is a third source for the problem that you detail (oil getting into the hub and diluting the grease to the point where it makes it out past the prop shaft seals) and that is the transfer tube seal itself. This is a crush washer type deal that is installed "underneath" the threaded portion of the transfer tube that screws into the motor and then sticks out and provides the oil path to get into the hub itself. A lot of people like to try and use these seals over again after pulling them out for inspection. That doesn't work real well. Good luck, Mark Bitterlich -----Original Message----- From: owner-yak-list-server@matronics.com [mailto:owner-yak-list-server@matronics.com] On Behalf Of Walter Lannon Sent: Friday, May 02, 2008 12:29 Subject: Re: Yak-List: Prop's That could be a normal condition after overhaul if excess grease was left outside of the blade seal area. Clean it and recheck. Is it both blades? If it continues you need to know whether it is grease or oil. Oil can only come from the pitch change unit or transfer tube and will initially show up leaking from the front of the hub at the "spinner" cap. Eventually it will fill the hub, dilute the grease and leak past the grease seals. The usual source is the two pitch change seals which would be replaced at overhaul. Who did your overhaul? Walt ----- Original Message ----- From: "CJcanuck" <m_kirk69@hotmail.com> Sent: Friday, May 02, 2008 7:51 AM Subject: Yak-List: Prop's > > Hey All! > > I've just reinstalled my prop after having it overhauled and repainted. > After shutting down from the first run we had a small amount of grease > running down each prop blade from the hub The flow is symmetrical as far > as I can tell. Having brand new seals and all I'm wondering if this is > 'normal' or if there are other issues at work here. > > On a related issue, I'm keen to contact the company in Australia that is > selling the prop spinners and some of the speed mods. Anyone have contact > info? > > Thanks! > > Mike Kirk > > > Read this topic online here: > > http://forums.matronics.com/viewtopic.php?p=180682#180682 > > >


    Message 11


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    Time: 11:53:39 AM PST US
    Subject: Re: Prop's
    From: "Bill Tally" <wtally@scottsboro.org>
    George Coy wrote an excellent article on prop maintenance that appears in Vol. 5, No. 2, page 3 of the old "Yak Driver" publication (from 1997). Referring to the assembly procedure, George says "You will see also that there is a blade "v" type seal that is supposed to retain the grease. I have found that these are not very effective, and that for the first 5 to 10 hours after lubricating the prop, grease will run out of these shank seals and leave streaks on the prop. That is just the way it is." I have found George's observations to be right on point. Read this topic online here: http://forums.matronics.com/viewtopic.php?p=180763#180763


    Message 12


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    Time: 12:48:55 PM PST US
    From: "Jerry Painter" <wild.blue@verizon.net>
    Subject: Fw: L/D redux


    Message 13


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    Time: 03:37:34 PM PST US
    Subject: Re: Fw: L/D
    From: Budd Davisson <buddairbum@cox.net>
    My attitude is that every airplane that can be landed power off from downwind SHOULD be landed power off as often as practical so the pilot develops an intuitive set of references. That way, when the engine finally does decide to pack up, you know exactly how the airplane is going to react in that situation. In high performance airplanes like Yaks, Pitts, etc, the L/D difference between power-off and just enough power to tell that you have it on, is huge. Partially because of the prop angle changing and partially because of matching the prop rpm to the forward speed, which reduces braking effect and greatly flattens the glide angle. If most approaches are flown with just a hair of power to make it easier to judge the approach, then, when the engine quits, the pilot is in unknown territory and on a test flight. I'm not saying every single approach should be flown power off (although mine always are, when possible), but enough should be to develop the references so you know where you'll be at the bottom of the dead engine glide from any altitude. I flew for 38 years without a single serious engine problem, then had two, in two different aircraft (a Pitts and a C-150) within 24 hours. I've had three since then, all three in one year, all three in Pitts (hard to diagnose fuel pump problems). Plus a fire and a complete loss of oil pressure. Knowing where it's going to go when the propeller stops propelling is a good thing. bd On 5/2/08 10:24 AM, "Jerry Painter" <wild.blue@verizon.net> wrote: > > I posted this yesterday, but for some reason it didn't show up on list, only > the header, so here it is again. > JP > > -------Original Message------- > > From: Jerry Painter > Date: 5/1/2008 7:44:25 AM > To: yak-list@matronics.com > Subject: L/D > > This is an interesting discussion. Let's see if I can make some waves, just > for fun. > > You can follow the same flight path power on/off flaps up/down etc. by > simply varying speed and drag. Power, speed, drag and flight path are all > interdependent variables--the Fab Four in the L/D equation. T-Crafts, > Cherokees, CJ's, -52's, 747's et al. I have to say I've never quite > understood what makes folks think that when you enter the pattern the > airplane suddenly becomes more likely to have an engine failure than while > en route, ergo power-off approaches, but that's another discussion. I fly > over mountains/water all the time. Yes, I understand that first power > reduction is the mostly likely time for engine failure, so take your time > about that, but we're talking approaches. I dare say "nobody," wannabees or > otherwise, "normally" makes power-off approaches in typical military or > civilian trainer, fighter or transport aircraft, feet wet or dry, recip or > turbine, though I'm sure there are exceptions (emergency/practice), but, hey > I'm just a civilian. The X-15 had a near 1:1 l/d, I expect the Shuttle isn > t much better, most of the approach is less than that. In any case, there's > no point in slowing to best L/D or pulling the power off until you've got > the runway made, X-15 or otherwise--we're not talking timed approaches are > we? The only time speed really matters is on touchdown. Budd is absolutely > right about the need to fit into the flow, like it or not--cutting others > off isn't just bad manners, its dangerous. At the home drome, KAWO, on those > occasional sunny and even usual rainy days we have to mix it up with various > civilian single/multi/turbines, helicopters (what makes them want to > land/autorotate on the runways and taxiways inquiring minds want to know, > SSH is--for the better--gone, but, apparently, not forgotten), gliders, > ultralights, RV 360 gaggles, overlapping patterns left, right, parallel and > diagonal plus the odd P-47, Me-109 (thank you, Paul Allen), Apha Jet/L-39 > and usual bizjets, practice ILS against the flow with missed right through > the downwind (tho not in the procedure). And once in a while the Navy drops > by in a P-3 for good measure, tho no B-1's or -2's, yet. > > Constant speed power-off 60mph approaches in your J-3 or power-off manhole > cover in your Pitts ainna gonna cut it for spacing, 360 or otherwise, no > hurry for combat turnaround. Plus, as Barry says, if you're making a 60 > degree bank be sure you keep the speed up because the stall just went to 1 > 4Vso. The only good thing about a 45 degree bank in the pattern is max rate > of turn for altitude lost, so its good for that (absolutely necessary?) 180 > back to the patch, but the stall goes up to 1.2Vso, so keep the speed up > then, too. And mid-airs ain't no fun, neither. > > The ILS is 3 degrees (20:1) for good reason, but not many of us can do it > power-off. Emergencies ain't standard procedure. > > Jerry Painter > CFI, A&P, Chief pilot, airport bum, permanent latrine orderly & c. > Wild Blue Aviation > 425-876-0865 > wild.blue@verizon.net > www.FlyWBA.com > > > >


    Message 14


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    Time: 04:14:51 PM PST US
    From: Brian Lloyd <brian-1927@lloyd.com>
    Subject: Re: L/D
    >> However, in some banked flight regimes, such as banked >> descending flight, the load factor may not increase. > > Or 110 degrees of bank in a wing over... ;) Ah, you remember. Brian Lloyd 3191 Western Drive brianl AT lloyd DOT com Cameron Park, CA 95682 +1.916.367.2131 (voice) +1.270.912.0788 (fax) PGP key ID: 12095C52A32A1B6C PGP key fingerprint: 3B1D BA11 4913 3254 B6E0 CC09 1209 5C52 A32A 1B6C


    Message 15


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    Time: 04:23:55 PM PST US
    From: Brian Lloyd <brian-1927@lloyd.com>
    Subject: Re: Glide speed and carrier approaches
    On May 2, 2008, at 11:23 AM, <scott.glaser@thedefiantcompany.com> wrote: > > I recently had some friends going for their PPL and we had a similar > discussion regarding traffic patterns. When I was learning my > instructor > bordered on being physically abusive if I was not within gliding > distance of > the runway anytime after being established on downwind. Several of my > friends who are currently working on or have recently received their > PPL > looked at me with a blank stare when I asked about this technique. > Awareness of engine out gliding distance in the pattern wasn't even > taught. That is *REALLY* odd because a power-off spot landing from downwind is a REQUIRED maneuver for PPL. (+200'/-0' from designated touch-down point.) > They did of course practice engine outs but that was merely practice > for off > field situation. They said their instruction was focused on quality > of > their pattern and setting up their approach. It was taught very > much from > the airline pilot perspective. It was kind of disturbing if you ask > me, but > then again it's not how I was raised. That was true for a long time but the FAA has brought this home with the required demonstration of the power-off spot landing. I let my CFI lapse two years ago and had to take a check-ride again. The DE was a stickler on this as it had just recently been added to the list of required maneuvers. As a CFI one must demonstrate this to CL proficiency, i.e. +100'/-0' from the designated touchdown point. Brian Lloyd 3191 Western Drive brianl AT lloyd DOT com Cameron Park, CA 95682 +1.916.367.2131 (voice) +1.270.912.0788 (fax) PGP key ID: 12095C52A32A1B6C PGP key fingerprint: 3B1D BA11 4913 3254 B6E0 CC09 1209 5C52 A32A 1B6C


    Message 16


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    Time: 07:21:24 PM PST US
    From: Walter Lannon <wlannon@persona.ca>
    Subject: Re: Prop's
    Mark; The J9 G1 and the V530 are absolutely identical in this respect. If you would re-read my post you will find that I did refer to the transfer as a third potential leak source. Cheers; Walt ----- Original Message ----- From: "Bitterlich, Mark G CIV Det Cherry Point, MALS-14 64E" <mark.bitterlich@navy.mil> Sent: Friday, May 02, 2008 11:33 AM Subject: RE: Yak-List: Prop's > MALS-14 64E" <mark.bitterlich@navy.mil> > > Not sure whether the CJ is identical to the M-14 in this regard, but on > the latter, there is a third source for the problem that you detail (oil > getting into the hub and diluting the grease to the point where it makes > it out past the prop shaft seals) and that is the transfer tube seal > itself. This is a crush washer type deal that is installed "underneath" > the threaded portion of the transfer tube that screws into the motor and > then sticks out and provides the oil path to get into the hub itself. A > lot of people like to try and use these seals over again after pulling > them out for inspection. That doesn't work real well. > > Good luck, > > Mark Bitterlich > > > -----Original Message----- > From: owner-yak-list-server@matronics.com > [mailto:owner-yak-list-server@matronics.com] On Behalf Of Walter Lannon > Sent: Friday, May 02, 2008 12:29 > To: yak-list@matronics.com > Subject: Re: Yak-List: Prop's > > > That could be a normal condition after overhaul if excess grease was > left outside of the blade seal area. Clean it and recheck. Is it both > blades? > If it continues you need to know whether it is grease or oil. Oil can > only come from the pitch change unit or transfer tube and will initially > show up leaking from the front of the hub at the "spinner" cap. > Eventually it will fill the hub, dilute the grease and leak past the > grease seals. The usual source is the two pitch change seals which would > be replaced at overhaul. > Who did your overhaul? > > Walt > ----- Original Message ----- > From: "CJcanuck" <m_kirk69@hotmail.com> > To: <yak-list@matronics.com> > Sent: Friday, May 02, 2008 7:51 AM > Subject: Yak-List: Prop's > > >> >> Hey All! >> >> I've just reinstalled my prop after having it overhauled and > repainted. >> After shutting down from the first run we had a small amount of grease > >> running down each prop blade from the hub The flow is symmetrical as > far >> as I can tell. Having brand new seals and all I'm wondering if this is > >> 'normal' or if there are other issues at work here. >> >> On a related issue, I'm keen to contact the company in Australia that > is >> selling the prop spinners and some of the speed mods. Anyone have > contact >> info? >> >> Thanks! >> >> Mike Kirk >> >> >> >> >> Read this topic online here: >> >> http://forums.matronics.com/viewtopic.php?p=180682#180682 >> >> >> >> >> >> >> >> >> >> >> > > >


    Message 17


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    Time: 07:55:41 PM PST US
    From: Jon Boede <jonboede@hotmail.com>
    Subject: Lone Star Red Star
    Just wanted to remind you guys about the fly-in and formation clinic at Lan caster, Texas... near Dallas. June 5th (Thursday) through 8th (Sunday). Formation clinic, social Friday night, hangar BBQ Saturday night with speak er. This year's speaker will be Gail Peck, who ran the Constant Peg squadron fl ying "borrowed" MiGs out at Nellis. Full information at http://www.cwam.org/LSRS Jon




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