---------------------------------------------------------- Europa-List Digest Archive --- Total Messages Posted Tue 04/06/21: 3 ---------------------------------------------------------- Today's Message Index: ---------------------- 1. 02:21 AM - Re: Weight and Balance question (John Wighton) 2. 02:58 AM - Re: Weight and Balance question (John Wighton) 3. 06:27 PM - Sun 'n Fun Lakeland 13-18 April, 2021 (budyerly@msn.com) ________________________________ Message 1 _____________________________________ Time: 02:21:16 AM PST US Subject: Europa-List: Re: Weight and Balance question From: "John Wighton" Gentlemen (and Ladies, if present), All this discussion on CG moment arm made my weekend, an absolute hoot from start to finish (is it finished yet?). This is not helped by the rather cack-handed approach prescribed in the POH. A reasonably common piece of data in this thread is the location of the datum. But even that may vary depending on who/how weighed/measured the aircraft - treat this as a variable across the fleet, but a constant for your aeroplane. Any calculation of W&B needs to use the actual mass as measured and the actual moment arm as measured. Weigh the item (you, pax, the dog, grannies apple pie or your bag of birdseed). Use that data in a spreadsheet. Link: http://www.lightaircraftassociation.co.uk/engineering/Weight%20and%20balance/w_and_b_main.html Skydemon also provides a very nice W&B calculator (it is legally necessary to do this for EVERY flight), which makes it easy-peazy. The moment arm I use for baggage is a measurement to the centre of the bay. However, the Europa Aircraft method of establishing the FS 0.0 datum is a comedy. A position 29.25" fwd of the "Rear of joggle for cowling in fuselage moulding" needs to be marked. This is totally unnecessary - the cowling to fuselage joint is as good a datum as any. It requires all moment arms forward of it to be given a negative sign (for the initial W&B calculation and any subsequent firewall forward mods) and all those aft of it to be positive. Just measure along the horizontal fuselage datum WL (level sill can be used as per POH) to the FS of the item to be measured. Attached is an extract from the POH (note the depicted Trigear also has a secreted mainwheel protruding from the fuselage!). -------- John Wighton Europa XS trigear G-IPOD Read this topic online here: http://forums.matronics.com/viewtopic.php?p=501289#501289 Attachments: http://forums.matronics.com//files/europa_wandb_303.jpg ________________________________ Message 2 _____________________________________ Time: 02:58:23 AM PST US Subject: Europa-List: Re: Weight and Balance question From: "John Wighton" Gentlemen (and Ladies, if present), All this discussion on CG moment arm made my weekend, an absolute hoot from start to finish (is it finished yet?). This is not helped by the rather cack-handed approach prescribed in the POH. A reasonably common piece of data in this thread is the location of the datum. But even that may vary depending on who/how weighed/measured the aircraft - treat this as a variable across the fleet, but a constant for your aeroplane. Any calculation of W&B needs to use the actual mass as measured and the actual moment arm as measured. Weigh the item (you, pax, the dog, grannies apple pie or your bag of birdseed). Use that data in a spreadsheet. Link: http://www.lightaircraftassociation.co.uk/engineering/Weight%20and%20balance/w_and_b_main.html Skydemon also provides a very nice W&B calculator (it is legally necessary to do this for EVERY flight), which makes it easy-peazy. The moment arm I use for baggage is a measurement to the centre of the bay. However, the Europa Aircraft method of establishing the FS 0.0 datum is a comedy. A position 29.25" fwd of the "Rear of joggle for cowling in fuselage moulding" needs to be marked. This is totally unnecessary - the cowling to fuselage joint is as good a datum as any. It requires all moment arms forward of it to be given a negative sign (for the initial W&B calculation and any subsequent firewall forward mods) and all those aft of it to be positive. Just measure along the horizontal fuselage datum WL (level sill can be used as per POH) to the FS of the item to be measured. Attached is an extract from the POH (note the depicted Trigear also has a secreted mainwheel protruding from the fuselage!). -------- John Wighton Europa XS trigear G-IPOD Read this topic online here: http://forums.matronics.com/viewtopic.php?p=501290#501290 Attachments: http://forums.matronics.com//files/europa_wandb_303.jpg ________________________________ Message 3 _____________________________________ Time: 06:27:30 PM PST US Subject: Europa-List: Sun 'n Fun Lakeland 13-18 April, 2021 From: "budyerly@msn.com" The weather here in central Florida is ideal. 60F in the morning and 80F in the afternoon. Sun 'n Fun should be an enjoyable time this year. I'm sorry so many of you are locked down, but in the land of Florida we have defied, are healthy and thrived and are flying. Anita and I have both had our vaccinations (but we both think we actually had Covid symptoms last year, luckily without serious problems) and are ready: "Have mask, Will Travel." I'm preparing to set up shop at Sun 'n Fun in spot N55 again compliments of Airmaster Propellers. The display aircraft was to be an Airmaster client with a brand new Pipistrel, but his aircraft has broken down (a 912iS having electrical issues). So I'm pushing as fast as I can to get my old plane cleaned up. Of course I decided to do a top overhaul on my Rotax, repaint some dings, and as one would expect, things are running, dripping and leaking under the hood, so I'm pushing to get 12AY buttoned up and test flown ASAP. >From the calls and emails I'm getting, it looks like a number of folks are hoping to come down. Weather for the week looks excellent, but pesky fronts to our north may make flying to Lakeland somewhat challenging. Personally, I've just heard my two sons are both going to be living in the Southeast US (Alabama and Virginia) for the next year or so and I will finally have someplace to fly on a weekend, weather permitting, for this summer and next year. It has been a long dry spell for me doing any cross country for sure. I only put 22 hours on my plane last year. Please open up over in Europe as my granddaughter and grandson's birthdays are in August/September and Oktoberfest in Germany would be a nice time to visit with my daughter near Ramstein Germany. Looking forward to seeing you all that can break out of lockdown. Bud and Anita Yerly Read this topic online here: http://forums.matronics.com/viewtopic.php?p=501297#501297 ------------------------------------------------------------------------------------- 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.