Original Posted By: "jarheadpilot82"
Mark,Here is a link to a previous thread discussing the Riblett incidence.http://forums.matronics.com/viewtopic.p ... incidenceI agree that the Aussie answer makes the most sense from a practical, builder pointof view.--------Semper Fi,Terry HandAthens, GARead this topic online here:http://forums.matronics.com/viewtopic.p ... ___Subject: Pietenpol-List: Re: Ash fuse gear block mounts... Just realized are 3/4not 1&qu
Pietenpol-List: Re: Ash fuse gear block mounts... Just realized are 3/4
Pietenpol-List: Re: riblett attack
Original Posted By: "Mark Roberts"
Mark,> Thoughts? Reassurances? Bets from the gallery as to when my gear collapses onme?I don't see those mounts as part of my set of plans, so I do not 100% understandwhat you are asking. I am sure that plenty of other guys can chime in that do.So, my question is this - what is the lost mass of the quarter inch relativeto the plans mount? Obviously, you are 25% thinner (3/4 inch vice 1 inch), butthat line tapers. So you are not 25% less overall mass. Are you 10%? 15%? 17.5%?I constantly see people write that this airplane is "overbuilt" (meaning that itis an overly strong design), but is that good enough for you to go fly yourfamily with this change to the mount? That is your call, and that is the realquestion. I guess that is one of the reasons that they call it experimental amateurbuilt. You can be your own test pilot on your personally designed mount.But ask Tools how much fun it is to replace gear when it collapses. Not fun,I would expect.--------Semper Fi,Terry HandAthens, GARead this topic online here:http://forums.matronics.com/viewtopic.p ... ___Subject: Pietenpol-List: Re: riblett attack
Mark,> Thoughts? Reassurances? Bets from the gallery as to when my gear collapses onme?I don't see those mounts as part of my set of plans, so I do not 100% understandwhat you are asking. I am sure that plenty of other guys can chime in that do.So, my question is this - what is the lost mass of the quarter inch relativeto the plans mount? Obviously, you are 25% thinner (3/4 inch vice 1 inch), butthat line tapers. So you are not 25% less overall mass. Are you 10%? 15%? 17.5%?I constantly see people write that this airplane is "overbuilt" (meaning that itis an overly strong design), but is that good enough for you to go fly yourfamily with this change to the mount? That is your call, and that is the realquestion. I guess that is one of the reasons that they call it experimental amateurbuilt. You can be your own test pilot on your personally designed mount.But ask Tools how much fun it is to replace gear when it collapses. Not fun,I would expect.--------Semper Fi,Terry HandAthens, GARead this topic online here:http://forums.matronics.com/viewtopic.p ... ___Subject: Pietenpol-List: Re: riblett attack
Pietenpol-List: Re: Ash fuse gear block mounts... Just realized are 3/4
Original Posted By: "tools"
thanks guys. that should do it. thanks.________________________________________________________________________________Subject: Pietenpol-List: Re: Ash fuse gear block mounts... Just realized are 3/4not 1&qu
thanks guys. that should do it. thanks.________________________________________________________________________________Subject: Pietenpol-List: Re: Ash fuse gear block mounts... Just realized are 3/4not 1&qu
Original Posted By: "Dortch, Steven D MAJ MIL USA NGB"
Hmmm, are you talking about the ash pieces that go from side to side on the fuse?I broke one and replaced it, thought it was supposed to be 3/4, it was 3/4 andI replaced it with 3/4, thinking I should go check the plans more carefully!Ergo, I think 3/4 is fine, the break was due to the fuse dropping onto the axle,not normal use. If it's supposed to be 1 tapering to 3/4, you won't lose anystrength in the area of the joint, as it's predicated on 3/4 clearly. Also, I'm not certain it EVER broke either. When I removed it, what looked likea crack to me, was a chip of wood that was more likely broken out when the originalfittings were installed. Wasn't difficult to replace (at that point),so did it anyway.IF you have any doubts to reconcile, laminate on a piece to bring up the plansdimensions. Simply carve or sand away the varnish beforehand. The laminatedpiece, done correctly, will be as strong (or stronger).I'm not sure why it would be 1 tapering to 3/4 anyway. When the plane was designed,1" lumber was indeed 1" thick. Getting 1" thick ash these days would requirelaminating, cutting down from 8 (or maybe 6/4) or more rarely, buying 5/4lumber. It's possible Pietenpol was using what was generally available. Muchof the cross section strength here is coming from that piece being laminatedonto the belly pan piece of 1/4 plywood. Good well fitted fittings are necessary though.Read this topic online here:http://forums.matronics.com/viewtopic.p ... __________
Hmmm, are you talking about the ash pieces that go from side to side on the fuse?I broke one and replaced it, thought it was supposed to be 3/4, it was 3/4 andI replaced it with 3/4, thinking I should go check the plans more carefully!Ergo, I think 3/4 is fine, the break was due to the fuse dropping onto the axle,not normal use. If it's supposed to be 1 tapering to 3/4, you won't lose anystrength in the area of the joint, as it's predicated on 3/4 clearly. Also, I'm not certain it EVER broke either. When I removed it, what looked likea crack to me, was a chip of wood that was more likely broken out when the originalfittings were installed. Wasn't difficult to replace (at that point),so did it anyway.IF you have any doubts to reconcile, laminate on a piece to bring up the plansdimensions. Simply carve or sand away the varnish beforehand. The laminatedpiece, done correctly, will be as strong (or stronger).I'm not sure why it would be 1 tapering to 3/4 anyway. When the plane was designed,1" lumber was indeed 1" thick. Getting 1" thick ash these days would requirelaminating, cutting down from 8 (or maybe 6/4) or more rarely, buying 5/4lumber. It's possible Pietenpol was using what was generally available. Muchof the cross section strength here is coming from that piece being laminatedonto the belly pan piece of 1/4 plywood. Good well fitted fittings are necessary though.Read this topic online here:http://forums.matronics.com/viewtopic.p ... __________
Pietenpol-List: Re: Ash fuse gear block mounts... Just realized are 3/4
Original Posted By: "Mark Roberts"
> Anything else you need to know? Uh yeah Jack: How can I get me a pair of them nice lookin' hubs! :)Thanks for the input. I am assuming a 21" rim is not the finished size with tire?Would those be 3" wide or 3" high? I am not familiar with tires yet (kind ignorantactually... can you tell by the question?)My plan is to use Spoked Tires with "Improved" gear, and it would seem that ifI did, I would raise the top of the longerons when level by much more than thedesign intended. Since the bigger wheels are taller than the wide tires of theimproved gear, it wold seem that using the wire spoked on the improved gearwould require a slight modification in the height of the gear legs, Right?Or is this overthinking things, and it is not that critical?Many thanks!Read this topic online here:http://forums.matronics.com/viewtopic.p ... ___Subject: Pietenpol-List: Re: Ash fuse gear block mounts... Just realized are 3/4not 1&q
> Anything else you need to know? Uh yeah Jack: How can I get me a pair of them nice lookin' hubs! :)Thanks for the input. I am assuming a 21" rim is not the finished size with tire?Would those be 3" wide or 3" high? I am not familiar with tires yet (kind ignorantactually... can you tell by the question?)My plan is to use Spoked Tires with "Improved" gear, and it would seem that ifI did, I would raise the top of the longerons when level by much more than thedesign intended. Since the bigger wheels are taller than the wide tires of theimproved gear, it wold seem that using the wire spoked on the improved gearwould require a slight modification in the height of the gear legs, Right?Or is this overthinking things, and it is not that critical?Many thanks!Read this topic online here:http://forums.matronics.com/viewtopic.p ... ___Subject: Pietenpol-List: Re: Ash fuse gear block mounts... Just realized are 3/4not 1&q
Pietenpol-List: Re: Ash fuse gear block mounts... Just realized are 3/4
Original Posted By: "tools"
Dave,I see your tag says you live in Pleasant Plain, OH. Well, I also live in PleasantPlain and it's not that big of a town so we have got to be just a few milesapart. I will warn you in advance that I have a GN-1 project out of wood, butyou are welcome to stop over anyway and we can talk airplane building. I willtry to send you a PM through Matronics with contact info.--------David GallagherZodiac 601 XL-B: flying, 250+ hours nowNext project under construction: Finish my father's AircamperRead this topic online here:http://forums.matronics.com/viewtopic.p ... ___Subject: Pietenpol-List: Re: Ash fuse gear block mounts... Just realized are 3/4not 1&qu
Dave,I see your tag says you live in Pleasant Plain, OH. Well, I also live in PleasantPlain and it's not that big of a town so we have got to be just a few milesapart. I will warn you in advance that I have a GN-1 project out of wood, butyou are welcome to stop over anyway and we can talk airplane building. I willtry to send you a PM through Matronics with contact info.--------David GallagherZodiac 601 XL-B: flying, 250+ hours nowNext project under construction: Finish my father's AircamperRead this topic online here:http://forums.matronics.com/viewtopic.p ... ___Subject: Pietenpol-List: Re: Ash fuse gear block mounts... Just realized are 3/4not 1&qu
Original Posted By: "Clif Dawson"
For the data point, mine is 3/4 all the way, no strap across, WELL TESTED. However,mine doesn't have the beveling, the bolts all JUST fit... I rebuilt it just like it was and tested it again! Seems to be just fine. Seriously,I believe the biggest issue is getting things to fit properly so there'sno movement.ToolsRead this topic online here:http://forums.matronics.com/viewtopic.p ... __________
For the data point, mine is 3/4 all the way, no strap across, WELL TESTED. However,mine doesn't have the beveling, the bolts all JUST fit... I rebuilt it just like it was and tested it again! Seems to be just fine. Seriously,I believe the biggest issue is getting things to fit properly so there'sno movement.ToolsRead this topic online here:http://forums.matronics.com/viewtopic.p ... __________