RV-List Digest Archive

Thu 05/28/09


Total Messages Posted: 9



Today's Message Index:
----------------------
 
     1. 01:48 PM - Mounting The Engine... (Matt Dralle)
     2. 02:17 PM - Re: Mounting The Engine... (Kevin Horton)
     3. 02:29 PM - Re: Mounting The Engine... (Greg Young)
     4. 03:20 PM - Re: Mounting The Engine... (MLWynn@aol.com)
     5. 04:13 PM - Re: Mounting The Engine... (Stan Jones)
     6. 04:23 PM - Re: Mounting The Engine... (Matt Dralle)
     7. 04:38 PM - Re: Re: Mounting The Engine... (Larry Bowen)
     8. 04:45 PM - Re: Re: Mounting The Engine... (Kevin Horton)
     9. 08:06 PM - Re: DynaVibe prop Balancer (RICHARD MILLER)
 
 
 


Message 1


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    Time: 01:48:58 PM PST US
    From: Matt Dralle <dralle@matronics.com>
    Subject: Mounting The Engine...
    Dear Listers, I'm getting close to mounting the engine on the 'ol RV-8. I'd like to hold off riveting the front top skin on until I'm sure all of the wiring and what not works with the various engine sensors. Is it "safe" to mount the engine before this skin is in place? Also, I have a QB and I noticed that none of the rivets along the sides where the cowl hinges go are riveted save for a couple of temporary pop rivets. Can the engine be mounted before these two areas are completely riveted? Thanks! Matt Dralle RV-8 #82880 N998RV Finishing Up The Wheels & Brakes...


    Message 2


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    Time: 02:17:57 PM PST US
    From: Kevin Horton <khorton01@rogers.com>
    Subject: Re: Mounting The Engine...
    On Thu, May 28, 2009 at 16:46, Matt Dralle <dralle@matronics.com> wrote: > > I'm getting close to mounting the engine on the 'ol RV-8. I'd like to hold > off riveting the front top skin on until I'm sure all of the wiring and what > not works with the various engine sensors. Is it "safe" to mount the engine > before this skin is in place? Also, I have a QB and I noticed that none of > the rivets along the sides where the cowl hinges go are riveted save for a > couple of temporary pop rivets. Can the engine be mounted before these two > areas are completely riveted? > My engine was on the mount for years before I riveted the front top skin. I'd do it that again. I checked my photos, and the rivets between the side skins and the firewall flanges (the ones that hold the cowl hinges) were also done after the engine had been hung. Good luck hanging the engine. -- Kevin Horton Ottawa, Canada


    Message 3


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    Time: 02:29:21 PM PST US
    From: "Greg Young" <gyoung@cs-sol.com>
    Subject: Mounting The Engine...
    On my RV-6 I hung the engine without the top skin but I'd recommend putting a rivet in every hole on the side skin to upper longeron. There is a lot of stress on those skins so I would not do it without riveting the side and bottom cowling attachments. Regards, Greg Young > -----Original Message----- > From: owner-rv-list-server@matronics.com > [mailto:owner-rv-list-server@matronics.com] On Behalf Of Matt Dralle > Sent: Thursday, May 28, 2009 3:47 PM > To: rv-list@matronics.com; rv8-list@matronics.com > Subject: RV-List: Mounting The Engine... > > > > Dear Listers, > > I'm getting close to mounting the engine on the 'ol RV-8. > I'd like to hold off riveting the front top skin on until I'm > sure all of the wiring and what not works with the various > engine sensors. Is it "safe" to mount the engine before this > skin is in place? Also, I have a QB and I noticed that none > of the rivets along the sides where the cowl hinges go are > riveted save for a couple of temporary pop rivets. Can the > engine be mounted before these two areas are completely riveted? > > Thanks! > > Matt Dralle > RV-8 #82880 N998RV > Finishing Up The Wheels & Brakes... > >


    Message 4


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    Time: 03:20:12 PM PST US
    From: MLWynn@aol.com
    Subject: Re: Mounting The Engine...
    I would echo the same thing. It is just not a problem to mount the engin e without the front upper skin on. There is a great little instruction on the VAF web site on mounting the engine. You definitely need a friend. Regards, Michael Wynn RV 8 FWF San Ramon, CA In a message dated 5/28/2009 2:24:25 P.M. Pacific Daylight Time, khorton01@rogers.com writes: On Thu, May 28, 2009 at 16:46, Matt Dralle <_dralle@matronics.com_ (mailto:dralle@matronics.com) > wrote: --> RV-List message posted by: Matt Dralle <_dralle@matronics.com_ (mailto:dralle@matronics.com) > I'm getting close to mounting the engine on the 'ol RV-8. I'd like to hold off riveting the front top skin on until I'm sure all of the wiring and what not works with the various engine sensors. Is it "safe" to mount th e engine before this skin is in place? Also, I have a QB and I noticed tha t none of the rivets along the sides where the cowl hinges go are riveted save for a couple of temporary pop rivets. Can the engine be mounted bef ore these two areas are completely riveted? My engine was on the mount for years before I riveted the front top skin. I'd do it that again. I checked my photos, and the rivets between the side skins and the firewall flanges (the ones that hold the cowl hinges) were also done after the engine had been hung. Good luck hanging the engine. -- Kevin Horton Ottawa, Canada ======================== ============ matronics.com/Navigator?RV-List) ======================== ============ ======================== ============ (http://www.matronics.com/contribution) ======================== ============ **************We found the real =98Hotel California=99 and the =98Seinfeld=99 diner. What will you find? Explore WhereItsAt.com. (http://www.whereitsat.com/#/music/all-spots/355/47.796964/-66.374711/2/Yo uve-Found-Where-Its-At?ncid=eml cntnew00000007)


    Message 5


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    Time: 04:13:56 PM PST US
    From: Stan Jones <stan.jones@xtra.co.nz>
    Subject: Re: Mounting The Engine...
    Yes Matt, I am looking at the same problem. I am building a slider, and the front section of that can't be built until the top skin is in place. I would like to start the motor to verify all of my wiring is OK. It's going to be a bit dicey not having those rivets in place and 200 HP thrashing around in the front I would be interested to hear what others have done Stan Jones On 29/05/2009, at 8:46 AM, Matt Dralle wrote: > > > Dear Listers, > > I'm getting close to mounting the engine on the 'ol RV-8. I'd like > to hold off riveting the front top skin on until I'm sure all of > the wiring and what not works with the various engine sensors. Is > it "safe" to mount the engine before this skin is in place? Also, > I have a QB and I noticed that none of the rivets along the sides > where the cowl hinges go are riveted save for a couple of temporary > pop rivets. Can the engine be mounted before these two areas are > completely riveted? > > Thanks! > > Matt Dralle > RV-8 #82880 N998RV > Finishing Up The Wheels & Brakes... > >


    Message 6


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    Time: 04:23:14 PM PST US
    From: Matt Dralle <dralle@matronics.com>
    Subject: Re: Mounting The Engine...
    Hum, hadn't though about actually starting the motor without the skin on. I was just thinking about whether it would hold the static weight. I guess to test all the wiring, the engine would really need to be started. So I guess I'll rephrase my question to "Could the engine be hung AND run without the top skin and sides riveted?" ...? Matt At 04:11 PM 5/28/2009 Thursday, you wrote: > >Yes Matt, I am looking at the same problem. I am building a slider, >and the front section of that can't be built until the top skin is in >place. >I would like to start the motor to verify all of my wiring is OK. >It's going to be a bit dicey not having those rivets in place and 200 >HP thrashing around in the front >I would be interested to hear what others have done > >Stan Jones >On 29/05/2009, at 8:46 AM, Matt Dralle wrote: > >> >> >>Dear Listers, >> >>I'm getting close to mounting the engine on the 'ol RV-8. I'd like >>to hold off riveting the front top skin on until I'm sure all of >>the wiring and what not works with the various engine sensors. Is >>it "safe" to mount the engine before this skin is in place? Also, >>I have a QB and I noticed that none of the rivets along the sides >>where the cowl hinges go are riveted save for a couple of temporary >>pop rivets. Can the engine be mounted before these two areas are >>completely riveted? >> >>Thanks! >> >>Matt Dralle >>RV-8 #82880 N998RV >>Finishing Up The Wheels & Brakes...


    Message 7


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    Time: 04:38:08 PM PST US
    Subject: Re: Mounting The Engine...
    From: Larry Bowen <larry@bowenaero.com>
    Hung without top skin: OK Run without top skin: I wouldn't IMO, -- Larry Bowen Larry@BowenAero.com http://BowenAero.com On Thu, May 28, 2009 at 7:21 PM, Matt Dralle <dralle@matronics.com> wrote: > > Hum, hadn't though about actually starting the motor without the skin on. > I was just thinking about whether it would hold the static weight. I guess > to test all the wiring, the engine would really need to be started. > > So I guess I'll rephrase my question to "Could the engine be hung AND run > without the top skin and sides riveted?" ...? > > Matt > > At 04:11 PM 5/28/2009 Thursday, you wrote: > > > >Yes Matt, I am looking at the same problem. I am building a slider, > >and the front section of that can't be built until the top skin is in > >place. > >I would like to start the motor to verify all of my wiring is OK. > >It's going to be a bit dicey not having those rivets in place and 200 > >HP thrashing around in the front > >I would be interested to hear what others have done > > > >Stan Jones > >On 29/05/2009, at 8:46 AM, Matt Dralle wrote: > > > >> > >> > >>Dear Listers, > >> > >>I'm getting close to mounting the engine on the 'ol RV-8. I'd like > >>to hold off riveting the front top skin on until I'm sure all of > >>the wiring and what not works with the various engine sensors. Is > >>it "safe" to mount the engine before this skin is in place? Also, > >>I have a QB and I noticed that none of the rivets along the sides > >>where the cowl hinges go are riveted save for a couple of temporary > >>pop rivets. Can the engine be mounted before these two areas are > >>completely riveted? > >> > >>Thanks! > >> > >>Matt Dralle > >>RV-8 #82880 N998RV > >>Finishing Up The Wheels & Brakes... > >


    Message 8


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    Time: 04:45:14 PM PST US
    From: Kevin Horton <khorton01@rogers.com>
    Subject: Re: Mounting The Engine...
    The engine thrashes around a bit at start and shutdown, and I'd want the structure to be complete. I wouldn't recommend starting the engine without having all the rivets in. You should be able to test about 99% of the wiring without starting the engine. Kevin Horton Ottawa, Canada On Thu, May 28, 2009 at 19:21, Matt Dralle <dralle@matronics.com> wrote: > > Hum, hadn't though about actually starting the motor without the skin on. > I was just thinking about whether it would hold the static weight. I guess > to test all the wiring, the engine would really need to be started. > > So I guess I'll rephrase my question to "Could the engine be hung AND run > without the top skin and sides riveted?" ...? > > Matt > > At 04:11 PM 5/28/2009 Thursday, you wrote: > > > >Yes Matt, I am looking at the same problem. I am building a slider, > >and the front section of that can't be built until the top skin is in > >place. > >I would like to start the motor to verify all of my wiring is OK. > >It's going to be a bit dicey not having those rivets in place and 200 > >HP thrashing around in the front > >I would be interested to hear what others have done > > > >Stan Jones > >On 29/05/2009, at 8:46 AM, Matt Dralle wrote: > > > >> > >> > >>Dear Listers, > >> > >>I'm getting close to mounting the engine on the 'ol RV-8. I'd like > >>to hold off riveting the front top skin on until I'm sure all of > >>the wiring and what not works with the various engine sensors. Is > >>it "safe" to mount the engine before this skin is in place? Also, > >>I have a QB and I noticed that none of the rivets along the sides > >>where the cowl hinges go are riveted save for a couple of temporary > >>pop rivets. Can the engine be mounted before these two areas are > >>completely riveted? > >> > >>Thanks! > >> > >>Matt Dralle > >>RV-8 #82880 N998RV > >>Finishing Up The Wheels & Brakes... >


    Message 9


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    Time: 08:06:53 PM PST US
    From: RICHARD MILLER <rickpegser@yahoo.com>
    Subject: DynaVibe prop Balancer
    gentelman: i use an ird smart meter 720. it gives me phase angle and amplitude of the vibration. second to this i use a ti 89 programed to give me the weights and angles i need for balancing. i have two channels front and back , i find that i only do the front unless i find a problem with the engine or mount. i have been told the the local experts that i need to play with the prop weights. as an i/a without a propshop repair station endorment i have to follow the rule for balancing and that limits me to the spinner backing plate. if any one is playing with the prop wieghts you should run. there is several problems with the cheap gear. 1 most of them do not do full spectrium anlysis. 2 you are unable to get the harmonics from the cheap gear. 3 some of them don't do phase angle, whlie you can still balance without phase angle it takes atleast 4 runs. the next question is why? the average cost for a balance is about 250.00$ this ballance will last untill a prop change/ engine change. so you have a choice buy a questionable piece of equipment. and try to do the job yourself. or hire someone with the right gear to do the job right, for 1/8 the cost of trying to buy the trash gear. rick i/a a+p --- On Wed, 4/22/09, Ralph Finch <rgf@dcn.davis.ca.us> wrote: > From: Ralph Finch <rgf@dcn.davis.ca.us> > Subject: RE: RV-List: DynaVibe prop Balancer > To: rv-list@matronics.com > Date: Wednesday, April 22, 2009, 10:18 AM > "Ralph Finch" <rgf@dcn.davis.ca.us> > > A typical dynamic balancer will place an accelerometer on > the engine and a > small reflective timing tape on the prop along with a cheap > light detector. > The outputs are sent to the balancer which using equations > of vibration will > figure out where and how much weight to place on the > spinner backplate. No > strobe involved, and certainly no trial and error: it's all > deterministic. > Once the weight is placed, it's measured once again to > check the improvement > and job done. > > Our RV club a year ago had a great presentation by a fellow > who measures the > acceleration (vibration) both fore and aft, not just in the > front. > Apparently this does a better job. > > The principles of dynamic balancing are not quantum > chromodynamics and the > equipment should be inexpensive, so no reason why these > things should cost > huge amounts. > > RF > > -----Original Message----- > From: owner-rv-list-server@matronics.com > [mailto:owner-rv-list-server@matronics.com] > On Behalf Of Richard Tasker > Sent: Wednesday, April 22, 2009 7:28 AM > To: rv-list@matronics.com > Subject: Re: RV-List: DynaVibe prop Balancer > > > Thanks, but that is really not the information I > need. I already know > the principles and how one does it in practice. I > just don't know > enough about the EVA2 to know if it can be used like the > description. > > Possibly it has an output for a strobe and can be used > exactly as the > description you referenced. If not, it could be used > in a trial and > error approach. Check the > balance.Add a little weight somewhere and > > see if the balance improves or degrades. Adjust > weights appropriately. > Fairly easy, but much easier with a synchronized strobe. > > Dick > > Vanremog@aol.com > wrote: > > This link has a pretty good explanation of the > principles involved in > > dynamic prop balancing. > > > > http://lists.kjsl.com/pipermail/beech-owners/2003-February/019466.html > > > > Forum - > FAQ, > - MATRONICS WEB FORUMS - > List Contribution Web Site - > -Matt > Dralle, List Admin. > > > >




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