---------------------------------------------------------- Zenith701801-List Digest Archive --- Total Messages Posted Mon 04/13/09: 6 ---------------------------------------------------------- Today's Message Index: ---------------------- 1. 01:04 AM - Re: Engine Choice (jetboy) 2. 05:19 AM - Wing spar drill to A5? (Mark Colbeck) 3. 06:11 AM - Re: Wing spar drill to A5? (Randall Hebert) 4. 09:13 AM - Re: Wing spar drill to A5? (Max Johansson) 5. 10:24 AM - Re: Wing spar drill to A5? (Randall Hebert) 6. 01:49 PM - Chat Room Reminder (George Race) ________________________________ Message 1 _____________________________________ Time: 01:04:00 AM PST US Subject: Zenith701801-List: Re: Engine Choice From: "jetboy" Mike, I agree with whats been said. I use the 2200 and the choice came down to whether I wanted to maintain a liquid cooled setup with gearbox and multiple carbs where one will do, or go air cooled direct drive layout with some loss of prop efficiency and top end performance. Another reason is the cost locally to me is 2:1 in favour of the Jabiru, and parts cost is also low - and I havent needed anything much. The plane can fly and perform on any powerplant that meets the plan's specs., just read them carefully its really expensive to change engine mounts and cowls later. Ralph -------- Ralph - CH701 / 2200a Read this topic online here: http://forums.matronics.com/viewtopic.php?p=238879#238879 ________________________________ Message 2 _____________________________________ Time: 05:19:17 AM PST US Subject: Zenith701801-List: Wing spar drill to A5? From: "Mark Colbeck" Guys I am not totally happy with the holes through the top skin and nose skin into the spar top. I would like to drill out to A5 on the spar only. Does anyone see any issue with this? -------- CH701 70% Complete www.mykitlog.com/mcolbeck Read this topic online here: http://forums.matronics.com/viewtopic.php?p=238886#238886 ________________________________ Message 3 _____________________________________ Time: 06:11:55 AM PST US From: "Randall Hebert" Subject: RE: Zenith701801-List: Wing spar drill to A5? I had to do that on my pilot side wing. Randall J Hebert -----Original Message----- From: owner-zenith701801-list-server@matronics.com [mailto:owner-zenith701801-list-server@matronics.com] On Behalf Of Mark Colbeck Guys I am not totally happy with the holes through the top skin and nose skin into the spar top. I would like to drill out to A5 on the spar only. Does anyone see any issue with this? ________________________________ Message 4 _____________________________________ Time: 09:13:37 AM PST US From: Max Johansson Subject: Re: Zenith701801-List: Wing spar drill to A5? Mark, it is perhaps not a good idea to enlarge the spar cap holes. My inspector refused even to let me add a new set of holes in a spar cap between old ones. Anywhere else it would have been OK but not in the spar cap ! Call ZAC, they probably have an opinion on this. rgrds, Max Mark Colbeck kirjoitti: > > Guys I am not totally happy with the holes through the top skin and nose skin into the spar top. I would like to drill out to A5 on the spar only. Does anyone see any issue with this? > > -------- > CH701 > 70% Complete > > www.mykitlog.com/mcolbeck > > > ________________________________ Message 5 _____________________________________ Time: 10:24:35 AM PST US From: "Randall Hebert" Subject: RE: Zenith701801-List: Wing spar drill to A5? One row of holes whether two holes or 20 does not affect the strength of the spar. If you try to put two Rows side by side (even if this were possible) then the strength would be severely affected. Think about looking at the cross section of the extrusion. You deduct the diameter of the hole times the thickness from the cross sectional area of the extrusion. This ignores the length and number of holes. Randall J Hebert Randall J Hebert & Associates, Inc Consulting Engineers Ph 337-261-1976 Fx 337-261-1977 -----Original Message----- From: owner-zenith701801-list-server@matronics.com [mailto:owner-zenith701801-list-server@matronics.com] On Behalf Of Max Johansson Sent: Monday, April 13, 2009 11:02 AM Subject: Re: Zenith701801-List: Wing spar drill to A5? Mark, it is perhaps not a good idea to enlarge the spar cap holes. My inspector refused even to let me add a new set of holes in a spar cap between old ones. Anywhere else it would have been OK but not in the spar cap ! Call ZAC, they probably have an opinion on this. rgrds, Max Mark Colbeck kirjoitti: > > Guys I am not totally happy with the holes through the top skin and nose skin into the spar top. I would like to drill out to A5 on the spar only. Does anyone see any issue with this? > > -------- > CH701 > 70% Complete > > www.mykitlog.com/mcolbeck > > > ________________________________ Message 6 _____________________________________ Time: 01:49:11 PM PST US From: "George Race" Subject: Zenith701801-List: Chat Room Reminder Live Chat Room every Monday evening around 8:00 EDT www.mykitairplane.com Click on the link on the page. 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