---------------------------------------------------------- Europa-List Digest Archive --- Total Messages Posted Sun 05/12/24: 3 ---------------------------------------------------------- Today's Message Index: ---------------------- 1. 06:29 AM - Re: Hi and ADSB-Out in my Europa (Area-51) 2. 11:44 AM - Re: Hi and ADSB-Out in my Europa (n7188u) 3. 03:13 PM - Re: Re: Hi and ADSB-Out in my Europa (Peter Z) ________________________________ Message 1 _____________________________________ Time: 06:29:49 AM PST US Subject: Europa-List: Re: Hi and ADSB-Out in my Europa From: "Area-51" FWIW 181's 80hp touches 120kt IAS at 5200rpm WOT on a 3 blade Bolly set to 19deg blade angle. I'd be happy with 135kt cruise on 24 MAP Read this topic online here: http://forums.matronics.com/viewtopic.php?p=513580#513580 ________________________________ Message 2 _____________________________________ Time: 11:44:04 AM PST US Subject: Europa-List: Re: Hi and ADSB-Out in my Europa From: "n7188u" OK, so in the interest of accurateness, I went up this morning when it was relatively calm and did 3 and 4 leg runs and used the very handy National Test Pilot School (NTPS) GPS Pitot-Static-Error spreadsheet to calculate Vtrue and the results are not quite as optimistic as my previous quick estimate but not too bad anyway. I include the output from the spreadsheet so you can look at it there. As a summary, I normally plan for 130 knots true at 5100 RPM at 4500-5500 feet as I mentioned. The check this morning shows that at 5100 I get 127 knots at 3000' and 128 knots at 4500' (MP 23.5 and 22.5 respectively). At 5200 RPM the speeds do go up to 129 knots at 3000' and 130 knots at 4500' (MP 24 and 23 respectively). I looked at measurements I took in 2021 with the same prop with a little more pitch and the speed kit (which I still have to paint and re-install) and I was getting 135 knots true at 4200' and 5100-5200 rpm. I reduced the pitch slightly which did make me loose some of this speed, but I like the takeoff performance better now, although it wasn't that bad before. I could get about the same climb with both finer and coarser pitch but the transition from 60 knots to 110 knots used to be a little sluggish and the RPM would drop to max torque at 4900 RPM. Now it stays at 5100+ RPM, the ground run is much shorter and no longer do I experience sluggishness when I retract the flaps and accelerate to cruise climb speed. It just feels better. Overall, I am very pleased with this engine/prop combination and the current setup. Chris Read this topic online here: http://forums.matronics.com/viewtopic.php?p=513581#513581 Attachments: http://forums.matronics.com//files/240512_n11eu_true_airspeed_505.png ________________________________ Message 3 _____________________________________ Time: 03:13:30 PM PST US From: Peter Z Subject: Re: Europa-List: Re: Hi and ADSB-Out in my Europa Thx for that Chris! When I have time I will attempt the same to compare with my eprop. Cheers! Pete > On May 12, 2024, at 2:52PM, n7188u wrote: > > > OK, so in the interest of accurateness, I went up this morning when it was relatively calm and did 3 and 4 leg runs and used the very handy National Test Pilot School (NTPS) GPS Pitot-Static-Error spreadsheet to calculate Vtrue and the results are not quite as optimistic as my previous quick estimate but not too bad anyway. I include the output from the spreadsheet so you can look at it there. > > As a summary, I normally plan for 130 knots true at 5100 RPM at 4500-5500 feet as I mentioned. The check this morning shows that at 5100 I get 127 knots at 3000' and 128 knots at 4500' (MP 23.5 and 22.5 respectively). At 5200 RPM the speeds do go up to 129 knots at 3000' and 130 knots at 4500' (MP 24 and 23 respectively). > > I looked at measurements I took in 2021 with the same prop with a little more pitch and the speed kit (which I still have to paint and re-install) and I was getting 135 knots true at 4200' and 5100-5200 rpm. I reduced the pitch slightly which did make me loose some of this speed, but I like the takeoff performance better now, although it wasn't that bad before. I could get about the same climb with both finer and coarser pitch but the transition from 60 knots to 110 knots used to be a little sluggish and the RPM would drop to max torque at 4900 RPM. Now it stays at 5100+ RPM, the ground run is much shorter and no longer do I experience sluggishness when I retract the flaps and accelerate to cruise climb speed. It just feels better. > > Overall, I am very pleased with this engine/prop combination and the current setup. > > Chris > > > > > Read this topic online here: > > http://forums.matronics.com/viewtopic.php?p=513581#513581 > > > > > Attachments: > > http://forums.matronics.com//files/240512_n11eu_true_airspeed_505.png > > > > > > ------------------------------------------------------------------------------------- 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.