---------------------------------------------------------- Yak-List Digest Archive --- Total Messages Posted Mon 04/20/15: 9 ---------------------------------------------------------- Today's Message Index: ---------------------- 1. 12:29 AM - Re: Re: V530 hub query (George Coyantonov2) 2. 12:47 AM - Re: V530 hub query (Richard Goode) 3. 05:06 AM - Re: V530 hub query (George Coy) 4. 05:51 AM - Re: V530 hub query (Richard Goode) 5. 09:09 AM - Re: V530 hub query (doug sapp) 6. 08:25 PM - Re: Air Leak Advice (AcroGimp) 7. 08:47 PM - Re: Re: Air Leak Advice (Dan Payne) 8. 09:02 PM - Re: Re: Air Leak Advice (Roger Kemp) 9. 09:23 PM - Re: Air Leak Advice (AcroGimp) ________________________________ Message 1 _____________________________________ Time: 12:29:22 AM PST US Subject: Re: Yak-List: Re: V530 hub query From: George Coyantonov2 Jay, we can supply a "reverse" adapter that will allow a V530 hub to mount on a western (SAE) flanged or electric start engine. George Coy Sent from my iPad > On Apr 19, 2015, at 9:20 PM, cjaviator wrote: > > > Thanks Doug.... > Sorry - i should have used the term 'serrated' instead of 'splined' when referring to the hub mounting method. > > So the question should have been: 'Can anyone confirm for me if the V530 hub is now made with a western style prop flange rather than the original serrated flange?' > > The engine he is looking to buy has a 'B' or western style prop flange which I understand to be similar to the Hartzell mounting method. > > regards, Jay > > > > > Read this topic online here: > > http://forums.matronics.com/viewtopic.php?p=441016#441016 > > > > > > > > > > ________________________________ Message 2 _____________________________________ Time: 12:47:15 AM PST US From: "Richard Goode" Subject: RE: Yak-List: V530 hub query There is some confusion here, possibly because there is a "B" engine and also a "B" propeller flange in MT descriptions. So to confirm: *The AI 14 (260 hp); the HS6 (285 horsepower) and the (quite rare) M 14 B engine (360 hp) all have a propeller shaft with longitudinal splines. *The M 14 P and PF have a propeller shaft with a six bolt flat "plate". *However, this "plate" either has the original Russian radial splines, and in terms of MT terminology is the "K" flange, or an American SAE (for example Lycoming) flat flange, called "B" in MT terminology. These two are interchangeable, but the gearbox needs to be disassembled to do this. *MT propellers were originally made with only the SAE "B" flange, and in order to fit this onto the Russian propeller shaft, an adapter between engine and propeller was used. With encouragement from us, and presumably others, MT then brought out the "K" flange which could be bolted to the original Russian "plate" type flange without an adapter. *To the best of my knowledge, you cannot put the shaft with longitudinal spines (as on M 14 B engine) onto the P or PF engine . *So, when Jay refers to an engine that has a "B" flange, he is using the MT terminology =93 i.e. the engine has the SAE (Lycoming) flange =93 and he wants to put on the Russian V-530 hub. However, this hub was only made to be used with the Russian flat flange with radial splines. So, if he wants to go down this route he needs to change the output flange on the gearbox. *We, and of course others in the US, can change this output shaft. Richard Goode Aerobatics Rhodds Farm Lyonshall Hereford HR5 3LW Tel: +44 (0) 1544 340120 Fax: +44 (0) 1544 340129 www.russianaeros.com From: owner-yak-list-server@matronics.com [mailto:owner-yak-list-server@matronics.com] On Behalf Of Royden Heays Sent: 20 April 2015 02:52 Subject: RE: Yak-List: V530 hub query George Coy at Gesoco in Vermont can get you a spline prop shaft to replace the western prop shaft. Then you can have him ship it to Jill and Carl at M14P and ship the nose case to them and they will do the swap for you. I know as I have done just that. Alternatively, switch to a MTV-9 prop that comes with your flange of choice. Royden A Kiwi in Canada From: owner-yak-list-server@matronics.com [mailto:owner-yak-list-server@matronics.com] On Behalf Of Jay McIntyre Sent: Sunday, April 19, 2015 3:02 PM Subject: Yak-List: V530 hub query Hi all, being more conversant in things Nanchang and Haosai related, I have a customer looking to buy an M-14PF engine that has a 'B' or western prop flange. He wants to put a V530 hub on it with Whirlwind blades. Can anyone confirm for me if the V530 hub is now made with a western style prop flange rather than the original splined flange? Thanks, Jay New Zealand http://www.matronics.com/Navigator?Yak-List http://forums.matronics.com http://www.matronics.com/contribution -- This message has been scanned for viruses and dangerous content by MailScanner, and is believed to be clean. -- This message has been scanned for viruses and dangerous content by MailScanner, and is believed to be clean. ________________________________ Message 3 _____________________________________ Time: 05:06:26 AM PST US Subject: Re: Yak-List: V530 hub query From: George Coy Richard you are quite right regards the descriptions but we do make what we c alled reverse adapter flange which has the Western flange and converts it to the Russian V530 propeller. We have supplied several of these to people who wish to run a western propeller flange for the electric start and still use the original V530 propeller George Sent from my iPhone > On Apr 20, 2015, at 3:45 AM, Richard Goode wrote: > > There is some confusion here, possibly because there is a "B" engine and a lso a "B" propeller flange in MT descriptions. So to confirm: > > *The AI 14 (260 hp); the HS6 (285 horsepower) and the (quite rare) M 14 B e ngine (360 hp) all have a propeller shaft with longitudinal splines. > > *The M 14 P and PF have a propeller shaft with a six bolt flat "plate". > > *However, this "plate" either has the original Russian radial splines, and in terms of MT terminology is the "K" flange, or an American SAE (for examp le Lycoming) flat flange, called "B" in MT terminology. These two are interc hangeable, but the gearbox needs to be disassembled to do this. > > *MT propellers were originally made with only the SAE "B" flange, and in o rder to fit this onto the Russian propeller shaft, an adapter between engine and propeller was used. With encouragement from us, and presumably others, M T then brought out the "K" flange which could be bolted to the original Russ ian "plate" type flange without an adapter. > > *To the best of my knowledge, you cannot put the shaft with longitudinal s pines (as on M 14 B engine) onto the P or PF engine . > > *So, when Jay refers to an engine that has a "B" flange, he is using the M T terminology =93 i.e. the engine has the SAE (Lycoming) flange =93 and he wants to put on the Russian V-530 hub. However, this hub was only made to be used with the Russian flat flange with radial splines. So, if he wants to go down this route he needs to change the output flange on the gea rbox. > > *We, and of course others in the US, can change this output shaft. > > Richard Goode Aerobatics > Rhodds Farm > Lyonshall > Hereford > HR5 3LW > > Tel: +44 (0) 1544 340120 > Fax: +44 (0) 1544 340129 > www.russianaeros.com > > From: owner-yak-list-server@matronics.com [mailto:owner-yak-list-server@ma tronics.com] On Behalf Of Royden Heays > Sent: 20 April 2015 02:52 > To: yak-list@matronics.com > Subject: RE: Yak-List: V530 hub query > > George Coy at Gesoco in Vermont can get you a spline prop shaft to replace the western prop shaft. Then you can have him ship it to Jill and Carl at M 14P and ship the nose case to them and they will do the swap for you. I know as I have done just that. > > Alternatively, switch to a MTV-9 prop that comes with your flange of choic e. > > Royden > A Kiwi in Canada > > From: owner-yak-list-server@matronics.com [mailto:owner-yak-list-server@ma tronics.com] On Behalf Of Jay McIntyre > Sent: Sunday, April 19, 2015 3:02 PM > To: yak list > Subject: Yak-List: V530 hub query > > Hi all, > being more conversant in things Nanchang and Haosai related, I have a cust omer looking to buy an M-14PF engine that has a 'B' or western prop flange. > He wants to put a V530 hub on it with Whirlwind blades. > Can anyone confirm for me if the V530 hub is now made with a western style prop flange rather than the original splined flange? > > Thanks, Jay > New Zealand > > > > > http://www.matronics.com/Navigator?Yak-List > > http://forums.matronics.com > > http://www.matronics.com/contribution > > > > -- > This message has been scanned for viruses and > dangerous content by MailScanner, and is > believed to be clean. > > > http://www.matronics.com/Navigator?Yak-List > http://forums.matronics.com > http://www.matronics.com/contribution > > > -- > This message has been scanned for viruses and > dangerous content by MailScanner, and is > believed to be clean. > > 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 4 _____________________________________ Time: 05:51:19 AM PST US From: "Richard Goode" Subject: RE: Yak-List: V530 hub query George =93 you are correct, and I have seen them in Romania, but had forgotten! So that is a simple way of joining a Russian hub (whether V-530 or MT) to an SAE flange. Richard Goode Aerobatics Rhodds Farm Lyonshall Hereford HR5 3LW Tel: +44 (0) 1544 340120 Fax: +44 (0) 1544 340129 www.russianaeros.com From: owner-yak-list-server@matronics.com [mailto:owner-yak-list-server@matronics.com] On Behalf Of George Coy Sent: 20 April 2015 13:05 Subject: Re: Yak-List: V530 hub query Richard you are quite right regards the descriptions but we do make what we called reverse adapter flange which has the Western flange and converts it to the Russian V530 propeller. We have supplied several of these to people who wish to run a western propeller flange for the electric start and still use the original V530 propeller George Sent from my iPhone On Apr 20, 2015, at 3:45 AM, Richard Goode wrote: There is some confusion here, possibly because there is a "B" engine and also a "B" propeller flange in MT descriptions. So to confirm: *The AI 14 (260 hp); the HS6 (285 horsepower) and the (quite rare) M 14 B engine (360 hp) all have a propeller shaft with longitudinal splines. *The M 14 P and PF have a propeller shaft with a six bolt flat "plate". *However, this "plate" either has the original Russian radial splines, and in terms of MT terminology is the "K" flange, or an American SAE (for example Lycoming) flat flange, called "B" in MT terminology. These two are interchangeable, but the gearbox needs to be disassembled to do this. *MT propellers were originally made with only the SAE "B" flange, and in order to fit this onto the Russian propeller shaft, an adapter between engine and propeller was used. With encouragement from us, and presumably others, MT then brought out the "K" flange which could be bolted to the original Russian "plate" type flange without an adapter. *To the best of my knowledge, you cannot put the shaft with longitudinal spines (as on M 14 B engine) onto the P or PF engine . *So, when Jay refers to an engine that has a "B" flange, he is using the MT terminology =93 i.e. the engine has the SAE (Lycoming) flange =93 and he wants to put on the Russian V-530 hub. However, this hub was only made to be used with the Russian flat flange with radial splines. So, if he wants to go down this route he needs to change the output flange on the gearbox. *We, and of course others in the US, can change this output shaft. Richard Goode Aerobatics Rhodds Farm Lyonshall Hereford HR5 3LW Tel: +44 (0) 1544 340120 Fax: +44 (0) 1544 340129 www.russianaeros.com From: owner-yak-list-server@matronics.com [mailto:owner-yak-list-server@matronics.com] On Behalf Of Royden Heays Sent: 20 April 2015 02:52 Subject: RE: Yak-List: V530 hub query George Coy at Gesoco in Vermont can get you a spline prop shaft to replace the western prop shaft. Then you can have him ship it to Jill and Carl at M14P and ship the nose case to them and they will do the swap for you. I know as I have done just that. Alternatively, switch to a MTV-9 prop that comes with your flange of choice. Royden A Kiwi in Canada From: owner-yak-list-server@matronics.com [mailto:owner-yak-list-server@matronics.com] On Behalf Of Jay McIntyre Sent: Sunday, April 19, 2015 3:02 PM Subject: Yak-List: V530 hub query Hi all, being more conversant in things Nanchang and Haosai related, I have a customer looking to buy an M-14PF engine that has a 'B' or western prop flange. He wants to put a V530 hub on it with Whirlwind blades. Can anyone confirm for me if the V530 hub is now made with a western style prop flange rather than the original splined flange? Thanks, Jay New Zealand http://www.matronics.com/Navigator?Yak-List http://forums.matronics.com http://www.matronics.com/contribution -- This message has been scanned for viruses and dangerous content by MailScanner, and is believed to be clean. http://www.matronics.com/Navigator?Yak-List http://forums.matronics.com http://www.matronics.com/contribution -- This message has been scanned for viruses and dangerous content by MailScanner, and is believed to be clean. 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 ist"">http://www.matronics.com/Navigator?Yak-List 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 //forums.matronics.com 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 ot;">http://www.matronics.com/contribution 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 -- This message has been scanned for viruses and dangerous content by MailScanner, and is believed to be clean. ________________________________ Message 5 _____________________________________ Time: 09:09:21 AM PST US Subject: Re: Yak-List: V530 hub query From: doug sapp Thank you George and Richard, I learned something new this morning, great way to start the week! Sorry my confusion muddied the waters. Doug On Mon, Apr 20, 2015 at 5:50 AM, Richard Goode < richard.goode@russianaeros.com> wrote: > George =93 you are correct, and I have seen them in Romania, but ha d > forgotten! So that is a simple way of joining a Russian hub (whether V-53 0 > or MT) to an SAE flange. > > > Richard Goode Aerobatics > > Rhodds Farm > > Lyonshall > > Hereford > > HR5 3LW > > > Tel: +44 (0) 1544 340120 > > Fax: +44 (0) 1544 340129 > > www.russianaeros.com > > > *From:* owner-yak-list-server@matronics.com [mailto: > owner-yak-list-server@matronics.com] *On Behalf Of *George Coy > *Sent:* 20 April 2015 13:05 > *To:* yak-list@matronics.com > *Subject:* Re: Yak-List: V530 hub query > > > Richard you are quite right regards the descriptions but we do make what > we called reverse adapter flange which has the Western flange and convert s > it to the Russian V530 propeller. We have supplied several of these to > people who wish to run a western propeller flange for the electric start > and still use the original V530 propeller > George > Sent from my iPhone > > > On Apr 20, 2015, at 3:45 AM, Richard Goode > wrote: > > There is some confusion here, possibly because there is a "B" engine and > also a "B" propeller flange in MT descriptions. So to confirm: > > > *The AI 14 (260 hp); the HS6 (285 horsepower) and the (quite rare) M 14 B > engine (360 hp) all have a propeller shaft with longitudinal splines. > > > *The M 14 P and PF have a propeller shaft with a six bolt flat "plate". > > > *However, this "plate" either has the original Russian radial splines, an d > in terms of MT terminology is the "K" flange, or an American SAE (for > example Lycoming) flat flange, called "B" in MT terminology. These two ar e > interchangeable, but the gearbox needs to be disassembled to do this. > > > *MT propellers were originally made with only the SAE "B" flange, and in > order to fit this onto the Russian propeller shaft, an adapter between > engine and propeller was used. With encouragement from us, and presumably > others, MT then brought out the "K" flange which could be bolted to the > original Russian "plate" type flange without an adapter. > > > *To the best of my knowledge, you cannot put the shaft with longitudinal > spines (as on M 14 B engine) onto the P or PF engine . > > > *So, when Jay refers to an engine that has a "B" flange, he is using the > MT terminology =93 i.e. the engine has the SAE (Lycoming) flange =93 and he > wants to put on the Russian V-530 hub. However, this hub was only made to > be used with the Russian flat flange with radial splines. So, if he wants > to go down this route he needs to change the output flange on the gearbox .. > > > *We, and of course others in the US, can change this output shaft. > > > Richard Goode Aerobatics > > Rhodds Farm > > Lyonshall > > Hereford > > HR5 3LW > > > Tel: +44 (0) 1544 340120 > > Fax: +44 (0) 1544 340129 > > www.russianaeros.com > > > *From:* owner-yak-list-server@matronics.com [ > mailto:owner-yak-list-server@matronics.com > ] *On Behalf Of *Royden Heays > *Sent:* 20 April 2015 02:52 > *To:* yak-list@matronics.com > *Subject:* RE: Yak-List: V530 hub query > > > George Coy at Gesoco in Vermont can get you a spline prop shaft to replac e > the western prop shaft. Then you can have him ship it to Jill and Carl at > M14P and ship the nose case to them and they will do the swap for you. I > know as I have done just that. > > > Alternatively, switch to a MTV-9 prop that comes with your flange of > choice. > > > Royden > > A Kiwi in Canada > > > *From:* owner-yak-list-server@matronics.com [ > mailto:owner-yak-list-server@matronics.com > ] *On Behalf Of *Jay McIntyre > *Sent:* Sunday, April 19, 2015 3:02 PM > *To:* yak list > *Subject:* Yak-List: V530 hub query > > > Hi all, > > being more conversant in things Nanchang and Haosai related, I have a > customer looking to buy an M-14PF engine that has a 'B' or western prop > flange. > He wants to put a V530 hub on it with Whirlwind blades. > > Can anyone confirm for me if the V530 hub is now made with a western styl e > prop flange rather than the original splined flange? > > > Thanks, Jay > New Zealand > > > *http://www.matronics.com/Navigator?Yak-List * > > > *http://forums.matronics.com * > > > *http://www.matronics.com/contribution * > > > -- > This message has been scanned for viruses and > dangerous content by *MailScanner* , and is > believed to be clean. > > > *http://www.matronics.com/Navigator?Yak-List * > > *http://forums.matronics.com * > > *http://www.matronics.com/contribution * > > > -- > This message has been scanned for viruses and > dangerous content by *MailScanner* , and is > believed to be clean. > > > *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* > > *ist"">http://www.matronics.com/Navigator?Yak-List * > > *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* > > *//forums.matronics.com * > > *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* > > *ot;">http://www.matronics.com/contribution * > > *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* > > > *http://www.matronics.com/Navigator?Yak-List * > > *http://forums.matronics.com * > > *http://www.matronics.com/contribution * > > > -- > This message has been scanned for viruses and > dangerous content by *MailScanner* , and is > believed to be clean. > > * > =========== nics.com/Navigator?Yak-List> =========== =========== om/contribution> =========== > > * > > ________________________________ Message 6 _____________________________________ Time: 08:25:45 PM PST US Subject: Yak-List: Re: Air Leak Advice From: "AcroGimp" 4-20-15 Update So I did a couple engine runs today to see if I could build any pressure and still no joy - no indication of pumping up on the gage and nothing out of the snot valve on shutdown. Will try the rubber glove test on compressor intake on Thursday AM, and if that shows good will replace crush washers at banjo (most likely/most hoped for right now). Want to verify that just pulling a few blades through should be enough to see if compressor is sucking air through filter. If compressor is sucking and banjo fitting doesn't fix it, would seem like line from banjo to snot valve, or snot valve itself would be next most likely culprit. I don't want to just shotgun it so advice appreciated. 'Gimp -------- Owner/Pilot N6209F 1987 Yak-52 COMM/ASEL/IFR/HP-Complex/TW Read this topic online here: http://forums.matronics.com/viewtopic.php?p=441072#441072 ________________________________ Message 7 _____________________________________ Time: 08:47:20 PM PST US From: Dan Payne Subject: Re: Yak-List: Re: Air Leak Advice How long after take off have you run the prop at 100%? You may have sheared the drive on the engine driven compressor... Keep 'em Flyin', Dan Payne Owner, Pilot, A&P-IA (423)-544-8946 Volunteer Aero Services Dallas Bay Skypark 1824 E Crabtree Road Hixson, TN 37343 "Where Airworthiness Means Business!" > On Apr 20, 2015, at 11:24 PM, AcroGimp wrote: > > > 4-20-15 Update > > So I did a couple engine runs today to see if I could build any pressure and still no joy - no indication of pumping up on the gage and nothing out of the snot valve on shutdown. > > Will try the rubber glove test on compressor intake on Thursday AM, and if that shows good will replace crush washers at banjo (most likely/most hoped for right now). > > Want to verify that just pulling a few blades through should be enough to see if compressor is sucking air through filter. > > If compressor is sucking and banjo fitting doesn't fix it, would seem like line from banjo to snot valve, or snot valve itself would be next most likely culprit. > > I don't want to just shotgun it so advice appreciated. > > 'Gimp > > -------- > Owner/Pilot N6209F 1987 Yak-52 > COMM/ASEL/IFR/HP-Complex/TW > > > > > Read this topic online here: > > http://forums.matronics.com/viewtopic.php?p=441072#441072 > > > > > > > > > > ________________________________ Message 8 _____________________________________ Time: 09:02:57 PM PST US Subject: Re: Yak-List: Re: Air Leak Advice From: Roger Kemp Gimp, You are on track. If the glove does not inflate you most likely have your problem. If your compressor check valve is clean and is free moving. If you change the crush washers while the airline to the snot valve is disconnected from the check valve do a compression test with the glove directly on the check valve. That would be the ultimate answer to the question of is the compressor making air. The piston and spring inside the check valve be installed backwards too. More food for thought. Doc Sent from my iPad > On Apr 20, 2015, at 10:24 PM, AcroGimp wrote: > > > 4-20-15 Update > > So I did a couple engine runs today to see if I could build any pressure and still no joy - no indication of pumping up on the gage and nothing out of the snot valve on shutdown. > > Will try the rubber glove test on compressor intake on Thursday AM, and if that shows good will replace crush washers at banjo (most likely/most hoped for right now). > > Want to verify that just pulling a few blades through should be enough to see if compressor is sucking air through filter. > > If compressor is sucking and banjo fitting doesn't fix it, would seem like line from banjo to snot valve, or snot valve itself would be next most likely culprit. > > I don't want to just shotgun it so advice appreciated. > > 'Gimp > > -------- > Owner/Pilot N6209F 1987 Yak-52 > COMM/ASEL/IFR/HP-Complex/TW > > > > > Read this topic online here: > > http://forums.matronics.com/viewtopic.php?p=441072#441072 > > > > > > > > > > ________________________________ Message 9 _____________________________________ Time: 09:23:22 PM PST US Subject: Yak-List: Re: Air Leak Advice From: "AcroGimp" dantpayne(at)icloud.com wrote: > How long after take off have you run the prop at 100%? > > You may have sheared the drive on the engine driven compressor... > > Keep 'em Flyin', > > Dan Payne > Owner, Pilot, A&P-IA > (423)-544-8946 > > Volunteer Aero Services > Dallas Bay Skypark > 1824 E Crabtree Road > Hixson, TN 37343 > > "Where Airworthiness Means Business!" > > > > > On Apr 20, 2015, at 11:24 PM, AcroGimp wrote: > > > > > > > > 4-20-15 Update > > > > So I did a couple engine runs today to see if I could build any pressure and still no joy - no indication of pumping up on the gage and nothing out of the snot valve on shutdown. > > > > Will try the rubber glove test on compressor intake on Thursday AM, and if that shows good will replace crush washers at banjo (most likely/most hoped for right now). > > > > Want to verify that just pulling a few blades through should be enough to see if compressor is sucking air through filter. > > > > If compressor is sucking and banjo fitting doesn't fix it, would seem like line from banjo to snot valve, or snot valve itself would be next most likely culprit. > > > > I don't want to just shotgun it so advice appreciated. > > > > 'Gimp > > > > -------- > > Owner/Pilot N6209F 1987 Yak-52 > > COMM/ASEL/IFR/HP-Complex/TW > > > > > > > > > > Read this topic online here: > > > > http://forums.matronics.com/viewtopic.php?p=441072#441072 > > > > > > > > > > > > > > > > > > > > > > > > > Dan I am usually pulling back to ~82% shortly after takeoff, especially on form training flights - I don't think I've kept 100% in for more than 90 seconds, 2 minutes max. During last couple form sorties a friend and fellow yak pilot did show that you can use the prop for catching up in-flight but that was limited to about 90% and for periods of well under a minute. That said, I am aware of the shear rivets in the drive and am concerned about that since the flight before it acted up it ran as well as it ever has with respect to pneumatics. Hoping for simple... 'Gimp -------- Owner/Pilot N6209F 1987 Yak-52 COMM/ASEL/IFR/HP-Complex/TW Read this topic online here: http://forums.matronics.com/viewtopic.php?p=441078#441078 ------------------------------------------------------------------------------------- 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.