---------------------------------------------------------- Zenith701801-List Digest Archive --- Total Messages Posted Sun 04/19/09: 10 ---------------------------------------------------------- Today's Message Index: ---------------------- 1. 02:22 AM - 701 Fuel line question (Mike Hoffman) 2. 07:04 AM - Re: Zenith Family Problems? (Tommy Walker) 3. 09:14 AM - Re: Zenith Family Problems? (Dan Wilde) 4. 09:37 AM - Re: 701 Fuel line question (Dan Wilde) 5. 10:29 AM - Re: 701 Fuel line question (fritz) 6. 02:32 PM - Chat Room Reminder For "Digesters" (George Race) 7. 04:43 PM - Re: test (Gary Gower) 8. 05:06 PM - Re: test (raymondj) 9. 10:28 PM - Re: Zenith Family Problems? (Gary Gower) 10. 10:35 PM - Re: Zenith Family Problems? (Gary Gower) ________________________________ Message 1 _____________________________________ Time: 02:22:45 AM PST US Subject: Zenith701801-List: 701 Fuel line question From: "Mike Hoffman" I am installing my new 912uls Rotax (100 hp) and am looking for a little advice on the proper fitting to use to transition through the firewall. Do you know if the fitting in the supplied motor fuel line is metric or US? I am not using a gas collator at the firewall. Thanks Read this topic online here: http://forums.matronics.com/viewtopic.php?p=240052#240052 ________________________________ Message 2 _____________________________________ Time: 07:04:30 AM PST US From: "Tommy Walker" Subject: Re: Zenith701801-List: Zenith Family Problems? I think the entire rigging of the Flaperon system in the 701 makes it resistant to flutter, provided the operator insures the linkage is secure. Steel rods tend to not lose their tension :-) . Also, the slow speed and drag should mitigate against flutter, again provided the various components are secure. However, I'm not an aeronautical engineer, though I've spent many nights in the HI Express chain. Tommy Walker Building 701 #2 and have eyes on a 750. Definitely Do Not Archive The term mayday used for signaling for help (after SOS), comes from the French word m'aidez, which is pronounced "may day" and means "Help Me." ________________________________ Message 3 _____________________________________ Time: 09:14:04 AM PST US From: Dan Wilde Subject: Re: Zenith701801-List: Zenith Family Problems? Yesterday I had my 701 at 102 mph and hit light turbulence at which point I slowed down. There was no shaking or flutter of anything. It was solid as a rock. Dan Wilde N948DW Tommy Walker wrote: > > I think the entire rigging of the Flaperon system in the 701 makes it > resistant to flutter, provided the operator insures the linkage is > secure. Steel rods tend to not lose their tension J . > > Also, the slow speed and drag should mitigate against flutter, again > provided the various components are secure. > > However, Im not an aeronautical engineer, though Ive spent many > nights in the HI Express chain. > > Tommy Walker > > Building 701 #2 and have eyes on a 750. > ________________________________ Message 4 _____________________________________ Time: 09:37:52 AM PST US From: Dan Wilde Subject: Re: Zenith701801-List: 701 Fuel line question Mike: My rubber fuel line just goes thru the firewall without a fitting. A rubber grommet protects the line from chaffing. Dan Wilde N948DW Mike Hoffman wrote: > > I am installing my new 912uls Rotax (100 hp) and am looking for a little advice on the proper fitting to use to transition through the firewall. Do you know if the fitting in the supplied motor fuel line is metric or US? I am not using a gas collator at the firewall. > > Thanks > > > ________________________________ Message 5 _____________________________________ Time: 10:29:08 AM PST US From: "fritz" Subject: Re: Zenith701801-List: 701 Fuel line question very dangerous setup ----- Original Message ----- From: "Dan Wilde" Sent: Sunday, April 19, 2009 12:36 PM Subject: Re: Zenith701801-List: 701 Fuel line question > > Mike: My rubber fuel line just goes thru the firewall without a fitting. > A rubber grommet protects the line from chaffing. > > Dan Wilde > N948DW > > Mike Hoffman wrote: >> >> >> I am installing my new 912uls Rotax (100 hp) and am looking for a little >> advice on the proper fitting to use to transition through the firewall. >> Do you know if the fitting in the supplied motor fuel line is metric or >> US? I am not using a gas collator at the firewall. >> >> Thanks >> >> >> >> >> > > > ________________________________ Message 6 _____________________________________ Time: 02:32:24 PM PST US From: "George Race" Subject: Zenith701801-List: Chat Room Reminder For "Digesters" Live Chat Room every Monday evening around 8:00 EDT www.mykitairplane.com Click on the Chat Room link on the page. George Do Not Archive ________________________________ Message 7 _____________________________________ Time: 04:43:39 PM PST US From: Gary Gower Subject: Re: Zenith701801-List: test This week end we decided to replace the pieces of tyre from the main gear s upport. we made a piece of nylamid betwen the fuselage and the main gear, =C2- we then flew it and works great. =C2- We did this:=C2- We installed the formed nylon piece (made with the Bridg eport) betwen the fuselage support and the gear, then we installed a (new) piece of tyre in the lower side, to avoid rigidity. Works great. =C2- Saludos Gary Gower. Flying from Chapala,=C2-Mexico 701 912S=C2-=C2- 238 hrs. Still building 601 XL=C2- 3300 Jab. =C2- --- On Fri, 4/17/09, Bob Collins wrote: From: Bob Collins Subject: Re: Zenith701801-List: test That's because everyone is on the Zenith-List, reacting to the NTSB report on the 601XL. There have been more than a hundred messages in last several days! Bob Collins Sunnyvale CA USA Bob Percival wrote: > > I=99ve not seen any messages since Tuesday =93 so =93 t esting. > > Bob Percival > > 701/Vair > > * > > > * =0A=0A=0A ________________________________ Message 8 _____________________________________ Time: 05:06:19 PM PST US From: "raymondj" Subject: Re: Zenith701801-List: test Gary, Could you post pictures or drawings of the parts and the installation? Raymond Julian Kettle River, MN "Hope for the best, but prepare for the worst." do not archive ----- Original Message ----- From: "Gary Gower" Sent: Sunday, April 19, 2009 6:43 PM Subject: Re: Zenith701801-List: test This week end we decided to replace the pieces of tyre from the main gear support. we made a piece of nylamid betwen the fuselage and the main gear, we then flew it and works great. We did this: We installed the formed nylon piece (made with the Bridgeport) betwen the fuselage support and the gear, then we installed a (new) piece of tyre in the lower side, to avoid rigidity. Works great. Saludos Gary Gower. Flying from Chapala, Mexico 701 912S 238 hrs. Still building 601 XL 3300 Jab. --- On Fri, 4/17/09, Bob Collins wrote: From: Bob Collins Subject: Re: Zenith701801-List: test That's because everyone is on the Zenith-List, reacting to the NTSB report on the 601XL. There have been more than a hundred messages in last several days! Bob Collins Sunnyvale CA USA Bob Percival wrote: > > Ive not seen any messages since Tuesday so testing. > > Bob Percival > > 701/Vair > > * > > > * -------------------------------------------------------------------------------- Checked by AVG - www.avg.com 19:52:00 ________________________________ Message 9 _____________________________________ Time: 10:28:32 PM PST US From: Gary Gower Subject: RE: Zenith701801-List: Zenith Family Problems? Dead stick landing technique is a must to practice in ALL airplanes. Here i s part of our training,- once "learned" should be practiced. - Might save your life, if any doubt, just ask the Hudson River Pilots. - Get some glider training will do you no harm. - Saludos Gary Gower Flying from Chapala, Mexico 701 912S 2 cycle engined ultralights "survivor" :-) :-) --- On Sun, 4/19/09, Bob Percival wrote: From: Bob Percival Subject: RE: Zenith701801-List: Zenith Family Problems? Bob, I'm no expert, but a quick browse of the NTSB accident database over the last 20 years returned 27 '701' accidents. As Craig said, only one fatality and a quick read of the probable cause on that accident would not lead you to suspect the design. I saw no mention of flutter or vibration in any of the reports. However, it appears that dead stick landing technique might be worth practicing. Bob Percival 701/Vair -----Original Message----- From: owner-zenith701801-list-server@matronics.com [mailto:owner-zenith701801-list-server@matronics.com] On Behalf Of Bob Collins Sent: Saturday, April 18, 2009 6:50 PM Subject: Zenith701801-List: Zenith Family Problems? I have a question for you long-time STOL aficionados. Is there any reason to worry about flutter of the flaperon on the Zenith STOL designs? I have been following the "discussion" about potential 601XL aileron flutter problems on the Zenith-List. One point seems to come through is that using a mass-balanced aileron is a relatively common practice in modern designs to reduce/eliminate flutter and, apparently, the 601XL depends on proper tension on the control cables to satisfy this need (Zenith has stated this). My personal observation is that, if what I just stated is true, using mass-balanced ailerons would be preferable because they require less frequent inspection and oversight. My current interest is in the CH750, which of course has no history other than what may be extrapolated from the 701 and 801. I don't see any evidence of mass-balancing on the STOL models. Now, in many ways the STOL planes are different than the 600 series designs, but is there any reason to worry about similar issues on the 750? My first pass observation is that the STOL planes are slower, have heavier control surfaces, and the flaperon linkage (probably) has more inherent mass. These would all point to flutter being less likely a problem on the STOL designs that on the 600 designs. In addition to concern about any (potential) real design issues, there is the effect this whole issue might have on the reputation of Zenith and the Zenith designs. A strong selling point for the Zenith designs is the sterling reputation of the chief designer. If there are valid criticisms of his design choices, particularly in an area that affects safety, this would affect the whole Zenith ecosystem. I am interested in your thoughts. Also, for those of you going to Sun'N'Fun, please report anything you learn that would be of help to us in the Zenith STOL community. Thank you, Bob Collins Sunnyvale CA USA Checked by AVG - www.avg.com 04/18/09 09:55:00 =0A=0A=0A ________________________________ Message 10 ____________________________________ Time: 10:35:18 PM PST US From: Gary Gower Subject: Re: Zenith701801-List: Zenith Family Problems? Hello Dan, =C2- Getting ready for the San Diego Red Bull Race?=C2- :-)=C2- :-)=C2- :- ) =C2- Saludos Gary Gower Do not archive. --- On Sun, 4/19/09, Dan Wilde wrote: From: Dan Wilde Subject: Re: Zenith701801-List: Zenith Family Problems? Yesterday I had my 701 at 102 mph and hit light turbulence at which point I slowed down. There was no shaking or flutter of anything. It was solid as a rock. Dan Wilde N948DW Tommy Walker wrote: > > I think the entire rigging of the Flaperon system in the 701 makes it resistant to flutter, provided the operator insures the linkage is secure. Steel rods tend to not lose their tension J . > > Also, the slow speed and drag should mitigate against flutter, again provided the various components are secure. > > However, I=99m not an aeronautical engineer, though I=99ve sp ent many nights in the HI Express chain. > > Tommy Walker > > Building 701 #2 and have eyes on a 750. > =0A=0A=0A ------------------------------------------------------------------------------------- Other Matronics Email List Services ------------------------------------------------------------------------------------- Post A New Message zenith701801-list@matronics.com UN/SUBSCRIBE http://www.matronics.com/subscription List FAQ http://www.matronics.com/FAQ/Zenith701801-List.htm Web Forum Interface To Lists http://forums.matronics.com Matronics List Wiki http://wiki.matronics.com Full Archive Search Engine http://www.matronics.com/search 7-Day List Browse http://www.matronics.com/browse/zenith701801-list Browse Digests http://www.matronics.com/digest/zenith701801-list Browse Other Lists http://www.matronics.com/browse Live Online Chat! http://www.matronics.com/chat Archive Downloading http://www.matronics.com/archives Photo Share http://www.matronics.com/photoshare Other Email Lists http://www.matronics.com/emaillists Contributions http://www.matronics.com/contribution ------------------------------------------------------------------------------------- These Email List Services are sponsored solely by Matronics and through the generous Contributions of its members.