---------------------------------------------------------- Zenith-List Digest Archive --- Total Messages Posted Sat 11/04/06: 22 ---------------------------------------------------------- Today's Message Index: ---------------------- 1. 03:54 AM - Re: Historic Zenair Zipper for sale (Michel Therrien) 2. 04:45 AM - Re: Electric flap actuator (roy vickski) 3. 05:06 AM - Re: Historic Zenair Zipper for sale (Jay Herron) 4. 05:39 AM - Re: Re :701 Stut fairings (n801bh@netzero.com) 5. 05:48 AM - Re: 701 vs ??? (n801bh@netzero.com) 6. 05:50 AM - Re: Re: Stut fairings (Tommy Walker) 7. 06:09 AM - Re: Free 2D drafting software (Chris Lewis) 8. 06:59 AM - Re: Historic Zenair Zipper for sale (MacDonald Doug) 9. 07:47 AM - Re: Re: 601 copies or vice versa? (Rosalie DeMeo) 10. 12:04 PM - Re: Re: Electric flap actuator (LHusky@aol.com) 11. 12:04 PM - Re: Electric flap actuator () 12. 01:31 PM - Nose Rib Forming Block (Doug Moellering) 13. 01:33 PM - Electric flap actuator / landing roll (Big Gee) 14. 01:35 PM - Re: Electric flap actuator (Craig Payne) 15. 02:09 PM - Re: Nose Rib Forming Block (George Swinford) 16. 02:15 PM - Re: Nose Rib Forming Block (Gary Boothe) 17. 02:19 PM - Nose Rib Forming Block (David Wright) 18. 02:32 PM - Re: Nose Rib Forming Block (Carlos Sa) 19. 03:16 PM - Re: Nose Rib Forming Block (dfmoeller) 20. 03:44 PM - Re: Nose Rib Forming Block (N5SL) 21. 05:03 PM - Re: Nose Rib Forming Block (LarryMcFarland) 22. 08:09 PM - Re: Nose Rib Forming Block (Ron Lendon) ________________________________ Message 1 _____________________________________ Time: 03:54:15 AM PST US From: Michel Therrien Subject: Re: Zenith-List: Historic Zenair Zipper for sale --> Zenith-List message posted by: Michel Therrien The two engines one is for sure a single seater... look at these pictures I took at Osh 2000: http://mthobby.pcperfect.com/ch601/images/Dcp00355.jpg http://mthobby.pcperfect.com/ch601/images/Dcp00354.jpg It is a pretty "crude" design.. ;) It is on this web page: http://mthobby.pcperfect.com/ch601/ev_osh2000a.htm Michel --- Peter Chapman wrote: > --> Zenith-List message posted by: Peter Chapman > > > At 22:56 02-11-06, you wrote: > > >--> Zenith-List message posted by: MacDonald Doug > > > > >Isn't the Zipper supposed to have two engines? > > I've read there were both one and two engined > versions. Not sure if > they corresponded to 1 and 2 seat models or not. > ... I sure hoped the > planes were less > crude than the marketing. Not sure if they actually > were any less > crude (although they were clever in some ways), but > at least they > were easily buildable and flyable. ---------------------------- Michel Therrien CH601-HD, C-GZGQ http://mthobby.pcperfect.com/ch601 http://www.zenithair.com/bldrlist/profiles/mthobby http://pages.infinit.net/mthobby Low, Low, Low Rates! Check out Yahoo! Messenger's cheap PC-to-Phone call rates (http://voice.yahoo.com) _- _- _- _- _- _- ________________________________ Message 2 _____________________________________ Time: 04:45:53 AM PST US From: roy vickski Subject: Re: Zenith-List: Electric flap actuator --> Zenith-List message posted by: roy vickski The controller could be replaced by an automotive power window switch, a M Benz rear door switch would do nicely, DC rated, relatively compact, straight forward mounting. Of course the throw and center position would need to be mechanically set ala pre computor RC aircraft radio/servo. Roy, 701 Michigan USA _- _- _- _- _- _- ________________________________ Message 3 _____________________________________ Time: 05:06:36 AM PST US Subject: Zenith-List: Re: Historic Zenair Zipper for sale From: "Jay Herron" --> Zenith-List message posted by: "Jay Herron" I believe they built about 100 Zenair Zippers. Most were single engine models powered by a JPX 2 cycle engine but there were a few twin engine designs built. I owned a single engine Zipper for a year, but never flew it. I was not able to get parts for the JPX engine and sold the project to buy a Quicksilver. I have attached a picure of my Zipper with my wife and oldest son. Also attached is a picture of a twin that I found on the internet. Read this topic online here: http://forums.matronics.com/viewtopic.php?p=72241#72241 Attachments: http://forums.matronics.com//files/zipper_154.jpg http://forums.matronics.com//files/zipper2_127.jpg _- _- _- _- _- _- ________________________________ Message 4 _____________________________________ Time: 05:39:48 AM PST US From: "n801bh@netzero.com" Subject: Re: Zenith-List: Re :701 Stut fairings Yeah yeah yeah, I have a tow bar , going uphill into the hangar takes m ore force then I want to put on the towbar. Since the fairings encase th e struts I am guessing they are not well supported for pushing against. And of course I don't want ANYONE pushing that hard on my prop.!!!!!!!!! !!! do not archive for sure... Ben Haas N801BH www.haaspowerair.com -- NYTerminat@aol.com wrote: Tow bar In a message dated 11/3/2006 9:39:48 P.M. Eastern Standard Time, n801bh@netzero.com writes:I don't have some on my 801. I do believe ZAC sells them as an option. I thought about installing some but I usually have someone helping me push the toy back into the hangar and I am not s ure they could stand any kind of abuse. Comments ??? do not archive ======================== ======================== ======================== ======================== ======================

Yeah yeah yeah, I have a tow bar ,  going uphill into the hangar takes more force then I want to put on the towbar. Since the fair ings encase the struts I am guessing they are not well supported for pus hing against. And of course I don't want ANYONE pushing that hard on my prop.!!!!!!!!!!!!

do not archive for sure...


Ben Haas
N801BH
www. haaspowerair.com

-- NYTerminat@aol.com wrote:

Tow bar
 
In a message dated 11/3/2006 9:39:48 P.M. Eastern Standard Time, n8 01bh@netzero.com writes:

I don't have some on my 801. I do believe ZAC sells them as an option . I thought about installing some but I usually have someone helping me push the toy back into the hangar and I am not sure they could stand any kind of abuse. Comments ???

do not archive

 


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________________________________ Message 5 _____________________________________ Time: 05:48:39 AM PST US From: "n801bh@netzero.com" Subject: Re: Zenith-List: 701 vs ??? The 801` appears to suffer from the same fate as all the 601's. ZAC clai ms 10-15 mph higher cruise speeds then anybody seems to be able to deriv e. I can get 108 maybe in level flight and full throttle. That is using about 330 sea level HP. Up here at 7000+msl that relates to somewhere in the 270 range. Keep in mind the motor is VERY detuned to prevent the p lane from making the lead story on the evening news. The 801, and I am guessing the 701 too is VERY areodynamicly dirty so drag compounds at the higher speeds. For instance, on takeoff I am burning 16+ GPH, at cr uise at 50% power I can run 88 mph@ 5.9-6.3 GPH, Speed up just 8 mph to 95 and the thing burns 11+. I will trade that off by just leaving a few minutes earlier and running at the slower speed. With that all said I st ill LOVE my 801.. do not archive Ben Haas N801BH www.haaspowerair.com -- NYTerminat@aol.com wrote: Ben, What kind of speed do you get?? How many HP do you have strapped in there? Bob Spudis In a message dated 11/3/2006 9:41:25 P.M. Eastern St andard Time, n801bh@netzero.com writes:I tried adding reflex [ that is r aising the flaps past their normal attitude]. The plane flies nose up an d you actually lose some speed. At least my 801 does.. Ben Haas N801BH www.haaspowerair.com ======================== ======================== ======================== ======================== ======================

The 801` appears to suffer from the same fate as all the 601's. ZAC claims 10-15 mph higher cruise speeds then anybody seems to be able to derive. I can get 108 maybe in level flight and full throttle. That is using about 330 sea level HP. Up here at 7000+msl that relates t o somewhere in the  270 range. Keep in mind the motor is VERY detun ed to prevent the plane from making the lead story on the evening news. <G> The 801, and I am guessing the 701 too is VERY areodynamicly d irty so drag compounds at the higher speeds. For instance, on takeoff I am burning 16+ GPH, at cruise at 50% power I can run 88 mph@ 5.9-6.3 GPH , Speed up just 8 mph to 95 and the thing burns 11+. I will trade t hat off by just leaving a few minutes earlier and running at the slower speed. With that all said I still LOVE my 801..

do not archive


Ben Haas
N801BH
www.haaspowerair .com

-- NYTerminat@aol.com wrote:

Ben,
What kind of speed do you get??
 
How many HP do you have strapped in there?
 
Bob Spudis
 
 
In a message dated 11/3/2006 9:41:25 P.M. Eastern Standard Time, n8 01bh@netzero.com writes:
I tried adding reflex [ that is raising the f laps past their normal attitude]. The plane flies nose up and you actual ly lose some speed. At least my 801 does..


Ben Haas
N 801BH
www.haaspowerair.com

 


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________________________________ Message 6 _____________________________________ Time: 05:50:14 AM PST US From: "Tommy Walker" Subject: Re: Zenith-List: Re: Stut fairings Ditto.... TommyWalker In Alabama Thank you kindly Bob. Jean-Paul do not archive ________________________________ Message 7 _____________________________________ Time: 06:09:32 AM PST US Subject: Zenith-List: Re: Free 2D drafting software From: "Chris Lewis" --> Zenith-List message posted by: "Chris Lewis" I've downloaded this software (it's huge) and it works quite well. I did get a follow up sales call and once I told him I was just building an airplane and not looking to move up to 3D, he wished me luck and thanked me for trying their product. There's a great tutorial at the beginning that takes you through drawing a right angled part with matched holes, so don't be afraid if you have little CAD background. Chris in Seattle -------- 701 Scratch Builder Read this topic online here: http://forums.matronics.com/viewtopic.php?p=72247#72247 _- _- _- _- _- _- ________________________________ Message 8 _____________________________________ Time: 06:59:02 AM PST US From: MacDonald Doug Subject: Re: Zenith-List: Historic Zenair Zipper for sale --> Zenith-List message posted by: MacDonald Doug Admittedly, it might be a little crude by today's standards but when compaired to similar vintage ultralights it looks like a well though out machine. At first I thought it kinda looked like a Lazair. Think Ford Model T Doug MacDonald NW Ontario, Canada CH-701 Scratch Builder Working on Cabin >The two engines one is for sure a single seater... >look at these pictures I took at Osh 2000: >http://mthobby.pcperfect.com/ch601/images/Dcp00355.jpg >http://mthobby.pcperfect.com/ch601/images/Dcp00354.jpg >It is a pretty "crude" design.. ;) >It is on this web page: >http://mthobby.pcperfect.com/ch601/ev_osh2000a.htm >Michel (http://smallbusiness.yahoo.com) _- _- _- _- _- _- ________________________________ Message 9 _____________________________________ Time: 07:47:10 AM PST US From: Rosalie DeMeo Subject: Re: Zenith-List: Re: 601 copies or vice versa? --> Zenith-List message posted by: Rosalie DeMeo Why mess with a copy when you can buy the real deal? Safety and experience are my primary concern. I would rather by from Chris Heintz' company than any copycat. If the copycat would shortcut design and research steps, what else has he shortcutted? Brad _- _- _- _- _- _- ________________________________ Message 10 ____________________________________ Time: 12:04:25 PM PST US From: LHusky@aol.com Subject: Re: Zenith-List: Re: Electric flap actuator I have a current price list sent to my by Shirley at ZAC. It shows $584.84 for part number D145-0036-3. Is there something different now? Larry Husky Lakeview, OR 601XL / Corvair Building Fuse Do Not Archive ________________________________ Message 11 ____________________________________ Time: 12:04:42 PM PST US From: Subject: Re: Zenith-List: Electric flap actuator I'm not quite to the installation phase yet, but I bought one of those linear actuators, and was wondering: If you leave it alone, and use t he flap arm as designed, would the flaps just move further down with t he 4-inch stroke, or would they hit something? Since I haven't mounted the wings yet, I don't know the answer. It seems to me that with a 4- inch stroke you just wind up with more flap than you'd need, as in 45 or 50 degrees travel, instead of 40 degrees. Could make for an impress ively short landing roll????????=0A=0APaul Rodriguez=0A601XL/ Corvair=0A ----- Original Message ----- =0A From: N5SL =0A To: zenith-list@matronics.com =0A Sent: Friday, November 03, 2006 9:31 AM =0A Subject: Re: Zenith-List: Electric flap actuator=0A=0A =0A Jean-Paul:=0A=0A If you look into this completely I thi nk you will come to the same conclusion I did. The unit has internal limit switches. It stops when reaching the end of travel in both dire ctions. This is perfect since the limit switches are out of site and never need adjusting. Adding limit switches just adds complexity and another failure mode. =0A=0A All you have to do is design the l inkage so that when the actuator extends fully, you have a fully exten ded flap. Likewise when the actuator travels the other way and reache s the limit, the flap is fully retracted. This was very easy to do an d the result is a light, maintenance-free unit. I'm not sure why ZAC uses the heavy, complex actuator but I spoke to Nick about this some t ime ago and he said my system was fine. He indicated that ZAC gets al l of their stuff from aircraft suppliers such as Aircraft Spruce and t he actuator I'm using is not in the ACS catalog. =0A=0A I'm no t knocking the ZAC system - it works fine, but if you are plans-buildi ng, there are other ways to do it.=0A=0A Scott Laughlin=0A www.cooknwithgas.com=0A working on B RS final installation details=0A=0A=0A=0A ----- Original Message ----=0A From: Jean-Paul Roy =0A=0A=0A I'm just thinking out loud here. Would two smal l limit swithes could control the travel lenght?=0A=0A Jean-Pau l=0A=0A=0A ----- Original Message ----- =0A From: N5 SL =0A=0A=0A Hi Fritz:=0A =0A I'd go with the model number and source Craig Payne posted. (I tem# 5-1577-2 has 2 inches of travel while 5-1577-4 has 4. The compani on controller can memorize intermediate stops: 5-1577-C. Each of these are well under $100. www.surpluscenter.com)=0A=0A He has a great talent for finding stuff! Thanks Craig - I'll save the information if I need another one later. =0A ======================= ======================= ======================= ======================= ======================= ======================= ===========0A=0A ________________________________ Message 12 ____________________________________ Time: 01:31:18 PM PST US From: "Doug Moellering" Subject: Zenith-List: Nose Rib Forming Block --> Zenith-List message posted by: "Doug Moellering" A question for you scratchbuilders out there. How really necessary are the 1/8 aluminum face plates on the forming blocks on the 601XL' nose ribs. I need to form some nose ribs and routing 1/8" think aluminum is scaring the crap out of me. I'm unable to hold the form steady enough to push through the router table. How about some suggestions from the scratchbuilders who have passed this point successfully. Doug _- _- _- _- _- _- ________________________________ Message 13 ____________________________________ Time: 01:33:00 PM PST US From: Big Gee Subject: Zenith-List: Electric flap actuator / landing roll Paul---- One thing I read some place (don't ask me where), was to make sure you DO NOT have more flap extension (degrees) than what is still possibl e to make a go-around if for some reason you couldn't get the flaps to retr act and must abort a landing.=0Ai.e. with the flaps at 90 degrees, at full power it might be impossible to gain altitude (go-around). ( I know this is an exaggerated example)--------- That is why : I WILL follow the advis e of having the linkage designed so at full actuator extention (travel ) I will have no more that the maximum flap dgrees specified by Chris H.---- (3 0 degrees)=0A=0AThere has been more than one IFE (in-flight emergency) due to a "run-a-way" actuator.=0A=0AFritz------ 601XL--90/90--Corvair =0A=0ADo not archive=0A=0A=0A=0A----- Original Message ----=0AFrom: "paulrod36@msn.c om" =0ATo: zenith-list@matronics.com=0ASent: Saturday, N ovember 4, 2006 3:03:59 PM=0ASubject: Re: Zenith-List: Electric flap actuat or=0A=0A=0AI'm not quite to the installation phase yet, but I bought one of those linear actuators, and was wondering: If you leave it alone, and use the flap arm as designed, would the flaps just move further down with the 4 -inch stroke, or would they hit something? Since I haven't mounted the wing s yet, I don't know the answer. It seems to me that with a 4-inch stroke yo u just wind up with more flap than you'd need, as in 45 or 50 degrees trave l, instead of 40 degrees. Could make for an impressively short landing roll ????????=0A =0APaul Rodriguez=0A601XL/Corvair=0A----- Original Message ---- - =0AFrom: N5SL =0ATo: zenith-list@matronics.com =0ASent: Friday, November 03, 2006 9:31 AM=0ASubject: Re: Zenith-List: Electric flap actuator=0A=0A =0AJean-Paul:=0A=0AIf you look into this completely I think you will come t o the same conclusion I did. The unit has internal limit switches. It sto ps when reaching the end of travel in both directions. This is perfect sin ce the limit switches are out of site and never need adjusting. Adding lim it switches just adds complexity and another failure mode. =0A=0AAll you ha ve to do is design the linkage so that when the actuator extends fully, you have a fully extended flap. Likewise when the actuator travels the other way and reaches the limit, the flap is fully retracted. This was very easy to do and the result is a light, maintenance-free unit. I'm not sure why ZAC uses the heavy, complex actuator but I spoke to Nick about this some ti me ago and he said my system was fine. He indicated that ZAC gets all of t heir stuff from aircraft suppliers such as Aircraft Spruce and the actuator I'm using is not in the ACS catalog. =0A=0AI'm not knocking the ZAC syste m - it works fine, but if you are plans-building, there are other ways to d o it.=0A=0AScott Laughlin=0Awww.cooknwithgas.com=0Aworking on BRS final ins tallation details=0A=0A=0A=0A----- Original Message ----=0AFrom: Jean-Paul Roy =0A=0A=0AI'm just thinking out loud he re. Would two small limit swithes could control the travel lenght?=0A =0AJe an-Paul=0A=0A=0A----- Original Message ----- =0AFrom: N5SL =0A=0A=0AHi Frit z:=0A=0AI'd go with the model number and source Craig Payne posted. (Item# 5-1577-2 has 2 inches of travel while 5-1577-4 has 4. The companion contro ller can memorize intermediate stops: 5-1577-C. Each of these are well unde r $100. www.surpluscentercom)=0A=0AHe has a great talent for finding stuff! Thanks Craig - I'll save the information if I need another one later. =0A=0A=0A=0A=0A ================== =le=http://www.matronics.com/Navigator?Zenith-List href="http://wwwma tronics.com/Navigator?Zenith-List">http://www.matronics.com/Navigat== ======================== _ =======================0A=0A ________________________________ Message 14 ____________________________________ Time: 01:35:57 PM PST US From: "Craig Payne" Subject: RE: Zenith-List: Electric flap actuator With the linkage as specified in the plans 4 inches is *way* too much travel. The factory set-up needs under 2 inches of travel. Ignoring the slots in the sides of the fuselage the movement is limited by the cross-member in front of the axle that spans the fuselage. The forward motion is limited by the arm bolted to the axle hitting the back of the member. The rearward motion is stopped when the bottom of the tube from the actuator hits the top of the member. Of course if you lengthen the arm from the axle you can change all this geometry. -- Craig ________________________________ Message 15 ____________________________________ Time: 02:09:25 PM PST US From: "George Swinford" Subject: Re: Zenith-List: Nose Rib Forming Block --> Zenith-List message posted by: "George Swinford" Doug: I have had good luck using tempered Masonite. It's easy to cut with a bandsaw or router and it's tough enough to last thru your project, and probably beyond. You can radius it with a file and skip the router altogether. George ----- Original Message ----- From: "Doug Moellering" Sent: Saturday, November 04, 2006 1:28 PM Subject: Zenith-List: Nose Rib Forming Block > --> Zenith-List message posted by: "Doug Moellering" > > A question for you scratchbuilders out there. How really necessary are the > 1/8 aluminum face plates on the forming blocks on the 601XL' nose ribs. I > need to form some nose ribs and routing 1/8" think aluminum is scaring the > crap out of me. I'm unable to hold the form steady enough to push through > the router table. > > How about some suggestions from the scratchbuilders who have passed this > point successfully. > > Doug > > > -- > > _- _- _- _- _- _- ________________________________ Message 16 ____________________________________ Time: 02:15:03 PM PST US From: "Gary Boothe" Subject: RE: Zenith-List: Nose Rib Forming Block --> Zenith-List message posted by: "Gary Boothe" Doug, I know it's heresy for those of us with power tools, but I formed the radius with a file. It should only take about 30 minutes to file and smooth. Thinking back, though, I could have fastened the 1/8" aluminum to the forming blocks and run the router around the edge. If you haven't yet tried using a router on aluminum, it's quite easy - hardly any different than wood. Gary Boothe Cool, CA 601 HDSTD, WW Conversion 90% done, Tail done, wings done, working on c-section -----Original Message----- From: owner-zenith-list-server@matronics.com [mailto:owner-zenith-list-server@matronics.com] On Behalf Of Doug Moellering Sent: Saturday, November 04, 2006 1:28 PM Subject: Zenith-List: Nose Rib Forming Block --> Zenith-List message posted by: "Doug Moellering" A question for you scratchbuilders out there. How really necessary are the 1/8 aluminum face plates on the forming blocks on the 601XL' nose ribs. I need to form some nose ribs and routing 1/8" think aluminum is scaring the crap out of me. I'm unable to hold the form steady enough to push through the router table. How about some suggestions from the scratchbuilders who have passed this point successfully. Doug _- _- _- _- _- _- ________________________________ Message 17 ____________________________________ Time: 02:19:06 PM PST US From: David Wright Subject: Zenith-List: Nose Rib Forming Block --> Zenith-List message posted by: David Wright Doug I have just finished my nose ribs and main ribs using ordinary plywood - bought from the local B&Q DIY store. I am going with the extended fuel tanks so I made 7 nose ribs per wing, the plywood held up very well and I believe I could make quite a few more. I did not treat the plywood in any way and just ran the 1/8" radius on the edge of the plywood. The results were fine. David Wright 601XL - Scratch build - wings Washington UK On Saturday, November 04, 2006, at 01:43PM, "Doug Moellering" wrote: >--> Zenith-List message posted by: "Doug Moellering" > >A question for you scratchbuilders out there. How really necessary are the >1/8 aluminum face plates on the forming blocks on the 601XL' nose ribs. I >need to form some nose ribs and routing 1/8" think aluminum is scaring the >crap out of me. I'm unable to hold the form steady enough to push through >the router table. > >How about some suggestions from the scratchbuilders who have passed this >point successfully. > >Doug > > >_-s > > _- _- _- _- _- _- ________________________________ Message 18 ____________________________________ Time: 02:32:17 PM PST US From: Carlos Sa Subject: Re: Zenith-List: Nose Rib Forming Block --> Zenith-List message posted by: Carlos Sa Hello, Doug I made my forming blocks with MDF, and then applied two coats of Varathane. All ribs were made with the same set of 4 blocks (nose and rear, left and right), and they are still good. Regarding routers: I have used a hand-held router for trimming thin and thick material, no problems - except it requires attention and a steady pair of hands. I have used a straight bit for this. Carlos CH601-HD, plans Leading edge of right wing assembled, drilled a clecoed Montreal, Canada ----- Original Message ---- From: Doug Moellering Sent: Saturday, November 4, 2006 4:28:10 PM Subject: Zenith-List: Nose Rib Forming Block --> Zenith-List message posted by: "Doug Moellering" A question for you scratchbuilders out there. How really necessary are the 1/8 aluminum face plates on the forming blocks on the 601XL' nose ribs. I need to form some nose ribs and routing 1/8" think aluminum is scaring the crap out of me. I'm unable to hold the form steady enough to push through the router table. How about some suggestions from the scratchbuilders who have passed this point successfully. Doug _- _- _- _- _- _- ________________________________ Message 19 ____________________________________ Time: 03:16:23 PM PST US Subject: Zenith-List: Re: Nose Rib Forming Block From: "dfmoeller" --> Zenith-List message posted by: "dfmoeller" Thanks all for the help. I'm going to get rid of that 1/8" aluminum layer and just radius the forming blocks. I've made the blocks from 3/4" oak finish grade plywood, 9 ply, so they should hold up, and if they don't, I'll just make another set. 1/8" aluminum screwed to the blocks is unsafe to rout with a router table. That router is throwing the block all over the place, I simply can't hold it secure enough and with the sharp edges, I'm already bleeding like a stuck pig. Maybe I could reverse strategy, clamp the part and hold the router, but I really don't see the need. Easier just to make an extra set if the first wears out. I did like the idea of masonite though, or maybe a formica layer instead of aluminum. This list is invaluable! Doug Read this topic online here: http://forums.matronics.com/viewtopic.php?p=72306#72306 _- _- _- _- _- _- ________________________________ Message 20 ____________________________________ Time: 03:44:28 PM PST US From: N5SL Subject: Re: Zenith-List: Nose Rib Forming Block --> Zenith-List message posted by: N5SL Doug: Just make them out of MDF and hand sand the corners. I did this with my first few ribs. When you get to the wing ribs (lots to do), you can set up the router for mass production. Don't worry about the aluminum. It's not necessary. MDF will make many, many ribs before deteriorating. Keep moving forward, you are on the right track. Scott Laughlin www.cooknwithgas.com Working on BRS details ----- Original Message ---- From: Doug Moellering dfmoeller@austin.rr.com --> Zenith-List message posted by: "Doug Moellering" A question for you scratchbuilders out there. How really necessary are the 1/8 aluminum face plates on the forming blocks on the 601XL' nose ribs. I need to form some nose ribs and routing 1/8" think aluminum is scaring the crap out of me. I'm unable to hold the form steady enough to push through the router table. How about some suggestions from the scratchbuilders who have passed this point successfully. Doug _- _- _- _- _- _- ________________________________ Message 21 ____________________________________ Time: 05:03:21 PM PST US From: LarryMcFarland Subject: Re: Zenith-List: Nose Rib Forming Block --> Zenith-List message posted by: LarryMcFarland Doug, My rib forming blocks were 5/8-inch plywood on both sides. Being tapered wings, a 7-degree back-angle was on both sides. There were two bolts, one each end, to align things and the aluminum sandwiched between the former blocks was also gripped by the vise I used to hold things while flanges were progressively bent. I didn't have any difficulty with the wood forms and could probably build another 10 sets of ribs with them. Never used aluminum back up plates and besides, they would have been a lot of unnecessary work. http://www.macsmachine.com/images/completion/full/viewwingrivets.jpg Larry McFarland - 601HDS at www.macsmachine.com Doug Moellering wrote: > --> Zenith-List message posted by: "Doug Moellering" > > > A question for you scratchbuilders out there. How really necessary > are the 1/8 aluminum face plates on the forming blocks on the 601XL' > nose ribs. I need to form some nose ribs and routing 1/8" think > aluminum is scaring the crap out of me. I'm unable to hold the form > steady enough to push through the router table. > > How about some suggestions from the scratchbuilders who have passed > this point successfully. > > Doug _- _- _- _- _- _- ________________________________ Message 22 ____________________________________ Time: 08:09:05 PM PST US Subject: Zenith-List: Re: Nose Rib Forming Block From: "Ron Lendon" --> Zenith-List message posted by: "Ron Lendon" I used 3/4" MDF and polysealed em. Worked great. I did make up a small aluminum block to qualify the nose radius wrinkles. Picture attached: I used a polished face hammer and just shrunk out the wrinkles by gently tapping the material to conform with the backing block. Process on mykitlog here: -------- Ron Lendon, Clinton Township, MI Corvair Zodiac XL, ScrapBuilder ;-) http://www.mykitlog.com/rlendon Read this topic online here: http://forums.matronics.com/viewtopic.php?p=72337#72337 Attachments: http://forums.matronics.com//files/100_0718_171.jpg _- _- _- _- _- _-