RV-List Digest Archive

Sun 12/30/07


Total Messages Posted: 17



Today's Message Index:
----------------------
 
     1. 02:01 AM - Re: High Temp Brake Fluid (Ron Schreck)
     2. 09:31 AM - Re: High Temp Brake Fluid (Vanremog@aol.com)
     3. 10:53 AM - Re: High Temp Brake Fluid (Randy Lervold)
     4. 02:37 PM - RV-7 vs Mustang II (Gordon or Marge)
     5. 02:51 PM - Brake O-rings (Ron Lee)
     6. 03:08 PM - Re: RV-7 vs Mustang II (David Burton)
     7. 03:38 PM - Re: RV-7 vs Mustang II (Charlie England)
     8. 04:14 PM - Re: RV-7 vs Mustang II (jan)
     9. 04:57 PM - Re: RV-7 vs Mustang II (Charlie England)
    10. 04:59 PM - Re: RV-7 vs Mustang II (Gordon or Marge)
    11. 05:00 PM - Re: RV-7 vs Mustang II (Gordon or Marge)
    12. 05:26 PM - Re: RV-7 vs Mustang II (Gordon or Marge)
    13. 06:35 PM - RV-9A CG change (Dan Ross)
    14. 08:33 PM - Re: RV-7 vs Mustang II (Rob Prior)
    15. 08:54 PM - Re: RV-9A CG change (Ron Lee)
    16. 10:09 PM - Re: RV-7 vs Mustang II (Brian Kraut)
    17. 10:30 PM - Re: Re: Synthetic brake fluid and Viton O-rings (Michael D. Cencula)
 
 
 


Message 1


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    Time: 02:01:50 AM PST US
    From: "Ron Schreck" <ronschreck@windstream.net>
    Subject: Re: High Temp Brake Fluid
    Thanks for the info. Do you have a part number or size specification for the o-rings needed? RS _http://www.thunderbirdfield.org/author.htm_ (http://www.thunderbirdfield.org/author.htm) _http://www.tc.gc.ca/CivilAviation/maintenance/aarpe/HumanPerformance/Stu dy4.h tm_ (http://www.tc.gc.ca/CivilAviation/maintenance/aarpe/HumanPerformance/Stu dy4.htm) _http://www.vansairforce.com/community/printthread.php?t=4737&pp=40_ (http://www.vansairforce.com/community/printthread.php?t=4737&pp=40) _http://flying.karmy.com/?cat=4_ (http://flying.karmy.com/?cat=4) _http://www.tpub.com/content/aviation/14018/css/14018_178.htm_ (http://www.tpub.com/content/aviation/14018/css/14018_178.htm) But, please also consider that not all O-ring breaches resulting in fluid leaks develop into full fledged brake fires. They can be caught during routine inspections and preflights when they can be remedied. I caught my original problem with the original Nitrile O-rings on the tarmac at Henderson Exec preparing to depart. It was an extremely inconvenient time to do a proper brake repair, so I elected to fly home and restrained my use of the brakes upon landing. There is no need for any of you to repeat this exercise. If you wish to not avail yourself of the opportunity to upgrade your brakes using very simple available means then all I can't do anything further but wish you all a happy new year and blue skies. N1GV (RV-6A, Flying 883hrs, O-360-A1A, C/S, Silicon Valley)


    Message 2


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    Time: 09:31:01 AM PST US
    From: Vanremog@aol.com
    Subject: Re: High Temp Brake Fluid
    In a message dated 12/30/2007 2:03:31 A.M. Pacific Standard Time, ronschreck@windstream.net writes: Thanks for the info. Do you have a part number or size specification for the o-rings needed? ============================================= It all in the archives and in one of the references I gave. Look for the term V75 and you should get there. N1GV (RV-6A, Flying 883hrs, O-360-A1A, C/S, Silicon Valley) (http://food.aol.com/top-rated-recipes?NCID=aoltop00030000000004)


    Message 3


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    Time: 10:53:08 AM PST US
    From: "Randy Lervold" <randy@romeolima.com>
    Subject: Re: High Temp Brake Fluid
    Info here... http://www.romeolima.com/RV3hq/Maintenance/maintenance.html#BrakeFluid RL ----- Original Message ----- From: Ron Schreck To: RV List Sent: Monday, December 31, 2007 12:59 AM Subject: Re: RV-List: High Temp Brake Fluid Thanks for the info. Do you have a part number or size specification for the o-rings needed? RS


    Message 4


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    Time: 02:37:18 PM PST US
    From: "Gordon or Marge" <gcomfo@tc3net.com>
    Subject: RV-7 vs Mustang II
    Several years ago Van wrote about a flight he made in his RV-6 against a Mustang II flown by a gent who had shot off his mouth about the virtues of thin wings and the lack of virtue of thick wings. I seem to recall that there was a side by side speed comparison but of that I'm not certain. I have looked back through my RVators to mid 1994 and not found it so far. Does anyone know where and when that was published? Are there any data comparing the RV-7 with the Mustang II? The reason for the questions is a friend is planning to build one or the other starting after SnF and quite naturally, I am trying to convince him to build the RV. He has fallen prey to the "thin wing" idea and since Mustang aviation is slightly more than a hour's drive from here he is leaning that way. Help, please in trying to prevent him from making a dreadful mistake. Gordon Comfort N363GC I'm actually mounting the Precision Eagle System components the -8 airframe.


    Message 5


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    Time: 02:51:47 PM PST US
    From: "Ron Lee" <ronlee@pcisys.net>
    Subject: Brake O-rings
    Look here for the master cylinder parts list: http://www.parker.com/ag/wbd/Cleveland/pdf/WB03c.pdf Ron Lee


    Message 6


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    Time: 03:08:33 PM PST US
    From: "David Burton" <d-burton@comcast.net>
    Subject: RV-7 vs Mustang II
    Hi Gordon, January 1988 Kitplanes published an article: Showdown at Checkpoint Charlie, the Mustang II vs. the RV-6. It's available for free if you are an EAA member. Just give them a call. DaveB _____ From: owner-rv-list-server@matronics.com [mailto:owner-rv-list-server@matronics.com] On Behalf Of Gordon or Marge Sent: Sunday, December 30, 2007 2:36 PM Subject: RV-List: RV-7 vs Mustang II Several years ago Van wrote about a flight he made in his RV-6 against a Mustang II flown by a gent who had shot off his mouth about the virtues of thin wings and the lack of virtue of thick wings. I seem to recall that there was a side by side speed comparison but of that I'm not certain. I have looked back through my RVators to mid 1994 and not found it so far. Does anyone know where and when that was published? Are there any data comparing the RV-7 with the Mustang II? The reason for the questions is a friend is planning to build one or the other starting after SnF and quite naturally, I am trying to convince him to build the RV. He has fallen prey to the "thin wing" idea and since Mustang aviation is slightly more than a hour's drive from here he is leaning that way. Help, please in trying to prevent him from making a dreadful mistake. Gordon Comfort N363GC I'm actually mounting the Precision Eagle System components the -8 airframe.


    Message 7


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    Time: 03:38:54 PM PST US
    From: Charlie England <ceengland@bellsouth.net>
    Subject: Re: RV-7 vs Mustang II
    Try not to refer to the decision as a 'dreadful mistake'. Hopefully, you're joking about that. I agree that for most people, the -7 is a better choice, but the M-II is a good airplane & if he feels like he can get 'local support' it might not be that bad a choice. I owned a M-II project for a while & I've flown several examples. If they are built correctly (much easier with the newer kits of pre-formed parts) they fly a lot like an RV. And you gotta admit, there are so many RVs flying now that building one almost looks like buying a Cessna to real he-man homebuilders. :-) Charlie David Burton wrote: > Hi Gordon, > > > > January 1988 Kitplanes published an article: > > Showdown at Checkpoint Charlie, the Mustang II vs. the RV-6. > > Its available for free if you are an EAA member. Just give them a call. > > DaveB ------------------------------------------------------------------------ > > *From:* owner-rv-list-server@matronics.com > [mailto:owner-rv-list-server@matronics.com] *On Behalf Of *Gordon or Marge > *Sent:* Sunday, December 30, 2007 2:36 PM > *To:* rv-list@matronics.com > *Subject:* RV-List: RV-7 vs Mustang II > > > > Several years ago Van wrote about a flight he made in his RV-6 against a > Mustang II flown by a gent who had shot off his mouth about the virtues > of thin wings and the lack of virtue of thick wings. I seem to recall > that there was a side by side speed comparison but of that I'm not > certain. I have looked back through my RVators to mid 1994 and not > found it so far. Does anyone know where and when that was published? > Are there any data comparing the RV-7 with the Mustang II? The reason > for the questions is a friend is planning to build one or the other > starting after SnF and quite naturally, I am trying to convince him to > build the > > RV. He has fallen prey to the "thin wing" idea and since Mustang > aviation is slightly more than a hour's drive from here he is leaning > that way. Help, please in trying to prevent him from making a dreadful > mistake. > > > > Gordon Comfort > > N363GC >


    Message 8


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    Time: 04:14:14 PM PST US
    From: jan <jan@claver.demon.co.uk>
    Subject: RV-7 vs Mustang II
    If my memory serves me right was it not a "thin" wing T18 that was the first "homebuilt" that flew around the world ?? Does anyone build any T18 today ???? Jan -----Original Message----- From: owner-rv-list-server@matronics.com [mailto:owner-rv-list-server@matronics.com] On Behalf Of Charlie England Sent: 30 December 2007 23:36 Subject: Re: RV-List: RV-7 vs Mustang II Try not to refer to the decision as a 'dreadful mistake'. Hopefully, you're joking about that. I agree that for most people, the -7 is a better choice, but the M-II is a good airplane & if he feels like he can get 'local support' it might not be that bad a choice. I owned a M-II project for a while & I've flown several examples. If they are built correctly (much easier with the newer kits of pre-formed parts) they fly a lot like an RV. And you gotta admit, there are so many RVs flying now that building one almost looks like buying a Cessna to real he-man homebuilders. :-) Charlie David Burton wrote: > Hi Gordon, > > > > January 1988 Kitplanes published an article: > > Showdown at Checkpoint Charlie, the Mustang II vs. the RV-6. > > It's available for free if you are an EAA member. Just give them a call. > > DaveB ------------------------------------------------------------------------ > > *From:* owner-rv-list-server@matronics.com > [mailto:owner-rv-list-server@matronics.com] *On Behalf Of *Gordon or Marge > *Sent:* Sunday, December 30, 2007 2:36 PM > *To:* rv-list@matronics.com > *Subject:* RV-List: RV-7 vs Mustang II > > > > Several years ago Van wrote about a flight he made in his RV-6 against a > Mustang II flown by a gent who had shot off his mouth about the virtues > of thin wings and the lack of virtue of thick wings. I seem to recall > that there was a side by side speed comparison but of that I'm not > certain. I have looked back through my RVators to mid 1994 and not > found it so far. Does anyone know where and when that was published? > Are there any data comparing the RV-7 with the Mustang II? The reason > for the questions is a friend is planning to build one or the other > starting after SnF and quite naturally, I am trying to convince him to > build the > > RV. He has fallen prey to the "thin wing" idea and since Mustang > aviation is slightly more than a hour's drive from here he is leaning > that way. Help, please in trying to prevent him from making a dreadful > mistake. > > > > Gordon Comfort > > N363GC >


    Message 9


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    Time: 04:57:45 PM PST US
    From: Charlie England <ceengland@bellsouth.net>
    Subject: Re: RV-7 vs Mustang II
    Yes and yes. There's a very active Thorplist on Yahoo, & there are actually *2* kit suppliers for the T & the wider bodied, modified airfoil S model. (Also a good flying plane; 90% of RV performance for ~1/2 the price in the already flying homebuilt market.) Charlie jan wrote: > > If my memory serves me right was it not a "thin" wing T18 that was the first > "homebuilt" that flew around the world ?? > > Does anyone build any T18 today ???? > > Jan > > -----Original Message----- > From: owner-rv-list-server@matronics.com > [mailto:owner-rv-list-server@matronics.com] On Behalf Of Charlie England > Sent: 30 December 2007 23:36 > To: rv-list@matronics.com > Subject: Re: RV-List: RV-7 vs Mustang II > > > Try not to refer to the decision as a 'dreadful mistake'. Hopefully, > you're joking about that. I agree that for most people, the -7 is a > better choice, but the M-II is a good airplane & if he feels like he can > get 'local support' it might not be that bad a choice. I owned a M-II > project for a while & I've flown several examples. If they are built > correctly (much easier with the newer kits of pre-formed parts) they fly > a lot like an RV. And you gotta admit, there are so many RVs flying now > that building one almost looks like buying a Cessna to real he-man > homebuilders. :-) > > Charlie > > > > David Burton wrote: >> Hi Gordon, >> >> >> >> January 1988 Kitplanes published an article: >> >> Showdown at Checkpoint Charlie, the Mustang II vs. the RV-6. >> >> It's available for free if you are an EAA member. Just give them a call. >> >> DaveB > ------------------------------------------------------------------------ >> *From:* owner-rv-list-server@matronics.com >> [mailto:owner-rv-list-server@matronics.com] *On Behalf Of *Gordon or Marge >> *Sent:* Sunday, December 30, 2007 2:36 PM >> *To:* rv-list@matronics.com >> *Subject:* RV-List: RV-7 vs Mustang II >> >> >> >> Several years ago Van wrote about a flight he made in his RV-6 against a >> Mustang II flown by a gent who had shot off his mouth about the virtues >> of thin wings and the lack of virtue of thick wings. I seem to recall >> that there was a side by side speed comparison but of that I'm not >> certain. I have looked back through my RVators to mid 1994 and not >> found it so far. Does anyone know where and when that was published? >> Are there any data comparing the RV-7 with the Mustang II? The reason >> for the questions is a friend is planning to build one or the other >> starting after SnF and quite naturally, I am trying to convince him to >> build the >> >> RV. He has fallen prey to the "thin wing" idea and since Mustang >> aviation is slightly more than a hour's drive from here he is leaning >> that way. Help, please in trying to prevent him from making a dreadful >> mistake. >> >> >> >> Gordon Comfort >> >> N363GC


    Message 10


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    Time: 04:59:58 PM PST US
    From: "Gordon or Marge" <gcomfo@tc3net.com>
    Subject: RV-7 vs Mustang II
    -----Original Message----- From: owner-rv-list-server@matronics.com [mailto:owner-rv-list-server@matronics.com] On Behalf Of Charlie England Sent: Sunday, December 30, 2007 6:36 PM Subject: Re: RV-List: RV-7 vs Mustang II Try not to refer to the decision as a 'dreadful mistake'. Hopefully, you're joking about that. I agree that for most people, the -7 is a better choice, but the M-II is a good airplane & if he feels like he can get 'local support' it might not be that bad a choice. I owned a M-II project for a while & I've flown several examples. If they are built correctly (much easier with the newer kits of pre-formed parts) they fly a lot like an RV. And you gotta admit, there are so many RVs flying now that building one almost looks like buying a Cessna to real he-man homebuilders. :-) Charlie Charlie: That was a bit of hyperbole there at the end. I recognize that for many people the MustangII is a good choice. I don't know what their status is but my friend and I will visit them soon and find out. It should help to clarify what is actually involved in building one. I made several flights with another friend who had built a II using a Buick engine and with his first powerplant installation I could literally fly circles around him with my 160hp RV-4. He improved his performance with a different prop and a new build on the engine but the installation was fairly draggy. He lost that airplane but has since built another with a 160hp CS setup but I have not been able to fly with him yet. It will likely be spring before that happens. Thank you for your input. Gordon


    Message 11


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    Time: 05:00:25 PM PST US
    From: "Gordon or Marge" <gcomfo@tc3net.com>
    Subject: RV-7 vs Mustang II
    -----Original Message----- From: owner-rv-list-server@matronics.com [mailto:owner-rv-list-server@matronics.com] On Behalf Of David Burton Sent: Sunday, December 30, 2007 6:07 PM Subject: RE: RV-List: RV-7 vs Mustang II Hi Gordon, January 1988 Kitplanes published an article: Showdown at Checkpoint Charlie, the Mustang II vs. the RV-6. It's available for free if you are an EAA member. Just give them a call. DaveB Dave: Thank you for your response. Man, that has been a while ago. Time flies. Gordon


    Message 12


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    Time: 05:26:35 PM PST US
    From: "Gordon or Marge" <gcomfo@tc3net.com>
    Subject: RV-7 vs Mustang II
    -----Original Message----- From: owner-rv-list-server@matronics.com [mailto:owner-rv-list-server@matronics.com] On Behalf Of jan Sent: Sunday, December 30, 2007 7:14 PM Subject: RE: RV-List: RV-7 vs Mustang II If my memory serves me right was it not a "thin" wing T18 that was the first "homebuilt" that flew around the world ?? Does anyone build any T18 today ???? Jan Jan: You are probably right, though I don't know what airfoil the T-18 uses. The -18 was likely the best available at the time, although the Mustang II has been around for a while. It would be interesting to know about new construction and whether or not they are using the Riblett airfoil. Thanks for the reply. Gordon P.S. Since writing the above I looked through my file cabinet and found a T-18 info pack that included a pretty good 3-view drawing. Scaling the drawing (admittedly risky) it looks like the airfoil is about a 12% section. Van's are 13.5%, quite a bit more. The span is given as 20' 10", the wing chord as 4' 2" and the wing area as 86 square feet. If the wing is 12% thick then max thickness is in the order of 6". The cover letter with the info was dated 4 Mar 75 and the drawing was revised 2 Feb 66, so I must have considered it when I was thinking about building. The RV-4 was started in 1982. GC


    Message 13


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    Time: 06:35:15 PM PST US
    From: "Dan Ross" <dcr@fdltownhomes.com>
    Subject: RV-9A CG change
    Guys: Today I begin the ugly task of moving my 10 pound battery from the firewall to behind the baggage compartment. I have an 0-360A4M with a Van's fixed pitched Sensenich prop and a nose wheel empty weight of 288 pounds. After reading Van's info indicating 315 is the maximum allowable, I decided to bite the bullet and move the battery aft. My figuring indicates that the battery movement will take 25 pounds off the nose wheel and move the empty CG aft 11/2 inches. My empty CG now is 76.05 at 1146 pounds and my most aft min fuel CG is 82.04 at max gross of 1750. Anyone see something I don't see. Dan, N65XX with 130 hours.


    Message 14


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    Time: 08:33:38 PM PST US
    From: "Rob Prior" <rv7@b4.ca>
    Subject: Re: RV-7 vs Mustang II
    On 14:35 2007-12-30 "Gordon or Marge" <gcomfo@tc3net.com> wrote: > Help, please in trying > to prevent him from making a dreadful mistake. Having flown in both an RV-6 and a Mustang II, I have to say that building a M-II would certainly not be a "dreadful mistake". I recall that it flew a lot like an RV-6. The cockpit felt tighter on the M-II... Couldn't say whether it was the overall width or the shape of the canopy, it was a few years ago that I flew in it. I'm 190 lbs and the owner was somewhere near 200. We were cozy, but not uncomfortable. Performance numbers were comparable, and the control feel was almost identical. I considered the M-II quite seriously before starting my -7. At the end of the day, I chose the -7 because there were a lot of people locally building RV's, and thought it would be more important to have that pool of knowledge to draw from on my first project. Also, my plan is to fly formation with other RV's, so it's better to have a plane that matches. Personally I like the tapered wing on the M-II better than the Hershey bar on the RV's, but it wasn't a large enough factor in my decision I guess. -Rob


    Message 15


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    Time: 08:54:39 PM PST US
    From: "Ron Lee" <ronlee@pcisys.net>
    Subject: Re: RV-9A CG change
    First...you are already 27 pounds under the max. Are you certain that you have a problem that requires moving the battery aft? ----- Original Message ----- From: Dan Ross To: rv-list@matronics.com Sent: Sunday, December 30, 2007 7:28 PM Subject: RV-List: RV-9A CG change Guys: Today I begin the ugly task of moving my 10 pound battery from the firewall to behind the baggage compartment. I have an 0-360A4M with a Van's fixed pitched Sensenich prop and a nose wheel empty weight of 288 pounds. After reading Van's info indicating 315 is the maximum allowable, I decided to bite the bullet and move the battery aft. My figuring indicates that the battery movement will take 25 pounds off the nose wheel and move the empty CG aft 11/2 inches. My empty CG now is 76.05 at 1146 pounds and my most aft min fuel CG is 82.04 at max gross of 1750. Anyone see something I don't see. Dan, N65XX with 130 hours.


    Message 16


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    Time: 10:09:49 PM PST US
    From: "Brian Kraut" <brian.kraut@engalt.com>
    Subject: RV-7 vs Mustang II
    I forwarded to the Mustang group to get an opinion. The question on the Mustang group comes up often and the general consenses is usually that the Mustang has better performance with the same engine, but is more work to build. One Mustangers opinion follows. -----Original Message----- From: mustangaero@yahoogroups.com [mailto:mustangaero@yahoogroups.com]On Behalf Of Kirk Harrell Sent: Sunday, December 30, 2007 11:58 PM Subject: Re: M.Aero: FW: RV-List: RV-7 vs Mustang II First of all, the "Checkpoint Charley" article was a comparison of a new, factory prepped, kit bird and a more used scratch built MII. There was no evaluation between relative aerodynamic cleanup or other variables that would add value to the comparison. My Mustang II is scratch built, and the leading edges of the wing are not properly formed, and it stalls hot, about 70 mph. The stall is not scary, it is just a stall that feels like the stall in a Cherokee 140. Yes, I land it faster,... so? Thousands upon thousands of people land on runways all over the world at much faster speeds every day, and never give it a thought. Get over the fact that your RV can land slower. The MII is great in a crosswind and I would rather have that capability than be able to land 10 - 15 mph slower. I raced the first leg of the 2002 Air Venture Cup (engine problems resulted in a DNF for the second leg). There were three RV-8's, one RV-6, one RV-6A and an RV-4 in my class, Formula FX which is fixed gear up to 360 cu. in. engines. Mine, a stock IO360-B1E 180 hp, with Hartzell prop. I finished the first leg fifth, behind two Glasair I's with same engine as mine, a turbocharged Glasair II with same engine as mine, and was just barely nipped by a Longeze for fourth... No RV's in front of me. I think that is more conclusive than the "Checkpoint Charlie" article. The RV is a fine plane, I've flown the 4, 6A, and 8. compared to my MII I think they are somewhat lighter on the ailerons, but they don't fly that much different (except for going fighteningly slow in the pattern! :-) ). The Mustang II is a fine bird as well, and does not deserve the reputation the RV crowd is trying to give it. Many Mustang builders have flown their birds for 20+ years, and put thousands of hours on them. They will tell you they love it more every time they fly it. I've only flown mine since 1998, and I love flying it, and love the way it flies. I've flown a lot of mile cross country in formation with RV's. It's a lot of fun, especially when we compare fuel tickets when we stop for gas. Kirk Harrell MII N22YR


    Message 17


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    Time: 10:30:25 PM PST US
    From: "Michael D. Cencula" <matronics@cencula.com>
    Subject: Re: Synthetic brake fluid and Viton O-rings
    For a *very* thorough writeup of DOT brake fluid and it's corrosive properties, please reference a NIST document: http://www.brakestrips.net/docs/nistir6233_absrpt.pdf The short answer seems to be that plain DOT fluid exceeds the corrosion resistance spec for aluminum by a factor of 10. Additionally, all automotive ABS modules that I'm aware of are made from aluminum which would further indicate that there's no problem with DOT brake fluid and aluminum compatibility. Mike Cencula RV-7A fuse Scott wrote: > > I was always under the impression that 5606 hydraulic was the way to > go. I thought DOT was corrosive to aluminum??? Might be FOS (full of > sh**) on this one, but I do seem to recall 5606 was the way to go > >




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