---------------------------------------------------------- Europa-List Digest Archive --- Total Messages Posted Thu 09/03/20: 7 ---------------------------------------------------------- Today's Message Index: ---------------------- 1. 06:42 AM - Airbox for 912S (Steven Pitt) 2. 07:31 AM - Re: Airbox for 912S (Jeff B) 3. 07:47 AM - Re: Airbox for 912S (david park) 4. 09:39 AM - Re: Airbox for 912S (D McFadyean) 5. 09:59 AM - Nose Wheel Shimmy (Matt Dovey) 6. 10:14 AM - Re: Nose Wheel Shimmy (Alan Burrill) 7. 02:27 PM - Re: Nose Wheel Shimmy (Jeff B) ________________________________ Message 1 _____________________________________ Time: 06:42:11 AM PST US From: Steven Pitt Subject: Europa-List: Airbox for 912S I have had to repair my airbox as it split under the clamp. Can anyone tell me how critical the airflow into the carburettors via the box is? Do I need to ensure a smooth and equal airflow? I suspect not as the quality of the airbox is somewhat rudimentary. For information I made up some bid' tube and epoxied it into the existing airflow tube. I have tried to make the entrance a smooth as possible. Thank you. Steve Pitt G-SMDH ________________________________ Message 2 _____________________________________ Time: 07:31:26 AM PST US Subject: Re: Europa-List: Airbox for 912S From: Jeff B Steve, you should be fine as long as the internal diameter of the tube is equal to or greater than the internal diameter of the carb opening. Jeff "I believe that forgiving them is God's function. Our job is to arrange the meeting." -Gen. Norman Schwarzkopf On 9/3/2020 8:40 AM, Steven Pitt wrote: > > I have had to repair my airbox as it split under the clamp. > Can anyone tell me how critical the airflow into the carburettors via the box is? Do I need to ensure a smooth and equal airflow? > > I suspect not as the quality of the airbox is somewhat rudimentary. > > For information I made up some bid' tube and epoxied it into the existing airflow tube. I have tried to make the entrance a smooth as possible. > > Thank you. > Steve Pitt > G-SMDH > > > ________________________________ Message 3 _____________________________________ Time: 07:47:46 AM PST US From: david park Subject: Re: Europa-List: Airbox for 912S When I had a airbox on initial build I bonded alloy tupe in to exits to strengthen them. Dave Park > On 3 Sep 2020, at 15:37, Jeff B wrote: > > > Steve, you should be fine as long as the internal diameter of the tube is equal to or greater than the internal diameter of the carb opening. > > Jeff > > "I believe that forgiving them is God's function. Our job is to arrange the meeting." > > -Gen. Norman Schwarzkopf > >> On 9/3/2020 8:40 AM, Steven Pitt wrote: >> I have had to repair my airbox as it split under the clamp. >> Can anyone tell me how critical the airflow into the carburettors via the box is? Do I need to ensure a smooth and equal airflow? >> I suspect not as the quality of the airbox is somewhat rudimentary. >> For information I made up some bid' tube and epoxied it into the existing airflow tube. I have tried to make the entrance a smooth as possible. >> Thank you. >> Steve Pitt >> G-SMDH > > > ________________________________ Message 4 _____________________________________ Time: 09:39:21 AM PST US From: D McFadyean Subject: Re: Europa-List: Airbox for 912S Steve, The air entry to the carbs is quite critical and should ideally be smooth and tapering inwards from a larger diameter, which the Europa airbox more or less achieves. Generally a 2 degree inward taper will help to preserve lamina flow in the runner, as is often seen on the runners of injected engines. This is further evidenced by the adverse impact on carburation that sharply curved SCAT tube and/or long parallel-sided runners has, such as on some Jabiru and VW installations. Duncan McF. > On 03 September 2020 at 15:30 Jeff B wrote: > > > > Steve, you should be fine as long as the internal diameter of the tube > is equal to or greater than the internal diameter of the carb opening. > > Jeff > > "I believe that forgiving them is God's function. Our job is to arrange > the meeting." > > -Gen. Norman Schwarzkopf > > On 9/3/2020 8:40 AM, Steven Pitt wrote: > > > > I have had to repair my airbox as it split under the clamp. > > Can anyone tell me how critical the airflow into the carburettors via the box is? Do I need to ensure a smooth and equal airflow? > > > > I suspect not as the quality of the airbox is somewhat rudimentary. > > > > For information I made up some bid' tube and epoxied it into the existing airflow tube. I have tried to make the entrance a smooth as possible. > > > > Thank you. > > Steve Pitt > > G-SMDH > > > > > > > > > ________________________________ Message 5 _____________________________________ Time: 09:59:38 AM PST US Subject: Europa-List: Nose Wheel Shimmy From: "Matt Dovey" When landing on a hard runway I always get nose wheel shimmy. I've checked the friction on the on the nose wheel fork and found no problem. Has anyone else had similar problems? Read this topic online here: http://forums.matronics.com/viewtopic.php?p=498144#498144 ________________________________ Message 6 _____________________________________ Time: 10:14:54 AM PST US From: Alan Burrill Subject: Re: Europa-List: Nose Wheel Shimmy I have never experienced any problems and have the friction set as per the book. I do have a nose wheel spat, standard speed kit, and also hold the nose off the runway until the authority of the tailplane is lost. Alan G-OBJT > On 3 Sep 2020, at 17:58, Matt Dovey wrote: > > > When landing on a hard runway I always get nose wheel shimmy. I've checked the friction on the on the nose wheel fork and found no problem. Has anyone else had similar problems? > > > > > Read this topic online here: > > http://forums.matronics.com/viewtopic.php?p=498144#498144 > > > > > > > > > ________________________________ Message 7 _____________________________________ Time: 02:27:34 PM PST US Subject: Re: Europa-List: Nose Wheel Shimmy From: Jeff B A little swipe of Nyogel 774VH on both sides of the fiber washer then torqued to spec will solve the problem. Jeff "I believe that forgiving them is God's function. Our job is to arrange the meeting." -Gen. Norman Schwarzkopf On 9/3/2020 11:58 AM, Matt Dovey wrote: > > When landing on a hard runway I always get nose wheel shimmy. I've checked the friction on the on the nose wheel fork and found no problem. Has anyone else had similar problems? > > > > > Read this topic online here: > > http://forums.matronics.com/viewtopic.php?p=498144#498144 > > > > > > > > > ------------------------------------------------------------------------------------- Other Matronics Email List Services ------------------------------------------------------------------------------------- Post A New Message europa-list@matronics.com UN/SUBSCRIBE http://www.matronics.com/subscription List FAQ http://www.matronics.com/FAQ/Europa-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/europa-list Browse Digests http://www.matronics.com/digest/europa-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.