Bell Driver Posted April 14, 2021 Share Posted April 14, 2021 About to go prop shopping. Savannah VG with Jabiru 2200. I'd appreciate members suggestions--what are your favorites? My bias is toward climb performance. 2 or 3 blade? Ground adjustable? If not, size and pitch. Link to comment Share on other sites More sharing options...
IBob Posted April 15, 2021 Share Posted April 15, 2021 I would recommend going to JG's website Stolspeed and reading the Props Comparison (scroll down to find the link on the left): https://www.stolspeed.com/ It's an interesting and informative read on props, tested on JG's Savannah VG In fact, the whole site is interesting and informative. 1 Link to comment Share on other sites More sharing options...
Bell Driver Posted April 15, 2021 Author Share Posted April 15, 2021 Thank you for the reminder. Great website! Link to comment Share on other sites More sharing options...
IBob Posted April 15, 2021 Share Posted April 15, 2021 Bell, there is real depth of Savannah experience in Australia, while here in New Zealand we are a bit later to the party. I think I'd be right in saying most Savannahs in this part of the world run 100hp Rotax 912 with a 3-bladed ground adjustable prop. Bolly, which is an Australian brand, are popular for the local builds, and I have been very happy with mine. As you can see on this site, there is also real interest in the E prop, which seems to be giving good results on various aircraft. And there is a fair bit of interesting and useful debate on how to arrive at best pitch. Let us know what you decide, and how you go! Link to comment Share on other sites More sharing options...
Kyle Communications Posted April 16, 2021 Share Posted April 16, 2021 He has a Jab engine so only certain props can be used because it is a direct drive engine Eprop are testing props for those style of engines now and will soon release their versions. There will be 2 and 3 blade available I am told Link to comment Share on other sites More sharing options...
Bell Driver Posted April 16, 2021 Author Share Posted April 16, 2021 I'd love to have another 15-20 hp (or more), but Jabiru 2200 is running well and problem free, so just looking to get the best possible performance possible from it-recognizing its limitations. If I were to change engines, the Viking 130 would probably be the frontrunner. Outstanding performance in Zenith 701. Link to comment Share on other sites More sharing options...
Bell Driver Posted April 17, 2021 Author Share Posted April 17, 2021 Looking forward to Eprop release for direct drive engines. Appreciate all comments and suggestions while I'm exploring this. Link to comment Share on other sites More sharing options...
IBob Posted April 17, 2021 Share Posted April 17, 2021 Maybe another way to phrase the question would be to ask what sort of props people here are running on Jabiru 2200 engines? Link to comment Share on other sites More sharing options...
Bell Driver Posted April 18, 2021 Author Share Posted April 18, 2021 Excellent suggestion. Love to hear from Jabiru 2200 powered Savannah VG owners. What prop are you running? Link to comment Share on other sites More sharing options...
Kyle Communications Posted April 18, 2021 Share Posted April 18, 2021 Here in OZ most seem to be running 2 blade wood props but some do use the carbon fibre 2 blades Link to comment Share on other sites More sharing options...
Bell Driver Posted April 18, 2021 Author Share Posted April 18, 2021 Presently using a wood 60X40 (from previous owner). Climb RPM 2900 (confirmed by Tiny Tach) Rate < 500fpm at sea level with weight at 1080 (have the increased gross wt. 1234 mod.) Don't presently have an accurate full throttle, level flight number. What performance are Jab 2200 operators getting. Climb rates of particular interest. Link to comment Share on other sites More sharing options...
eightyknots Posted April 18, 2021 Share Posted April 18, 2021 (edited) On 17/04/2021 at 12:23 AM, Bell Driver said: I'd love to have another 15-20 hp (or more), but Jabiru 2200 is running well and problem free, so just looking to get the best possible performance possible from it-recognizing its limitations. If I were to change engines, the Viking 130 would probably be the frontrunner. Outstanding performance in Zenith 701. Viking 130 engines, although really good, are heavy. If you changed to a Viking 130, you may just have enough weight remaining for the pilot and the tanks filled with fuel and you'd reach your extended 560 kg (1,234 lb) weight limit. You will only be able to carry a feather for a passenger. Edited April 18, 2021 by eightyknots Link to comment Share on other sites More sharing options...
Bell Driver Posted April 18, 2021 Author Share Posted April 18, 2021 True, weight would be tight--wallet would be much lighter though😋 Really hoping Jabiru soldiers on so no engine change has to be considered. Link to comment Share on other sites More sharing options...
IBob Posted April 18, 2021 Share Posted April 18, 2021 Bell, here is a publication from the British Microlight Assoc: https://www.bmaa.org/files/hads_hm10_savannah.pdf Right at the end are performance figures for the for the VG/Jabiru (but with no information on weight). They quote 860fpm for VG/Jabiru(1-4). If you go to the table near the top (you have to look for the VG, not the plain Savannah), the first has a 65" prop pitched very fine, the second and third have 62" props, and the fourth has 60" pitched fine They then quote 600fpm for VG/Jabiru (5 and LS). These are 61" props pitched medium. These figures are suspiciously rounded and consistent, but it looks from that as though you are better with a slightly larger prop pitched a little fine. Which would make sense: looking at JG's comparative study the only prop that didn't quite perform was the smaller diameter one. 1 Link to comment Share on other sites More sharing options...
Bell Driver Posted April 19, 2021 Author Share Posted April 19, 2021 Thanks for the link. Agree that it suggests larger diameter pitched fine. Helpful! Noted that max RPM is shown as 3100 and Max Gross weight is 450kg. Link to comment Share on other sites More sharing options...
IBob Posted April 19, 2021 Share Posted April 19, 2021 I should add that I don't pretend to know anything about props, Bell, apart from the one I'm currently using. Apparently the standard convention is to measure the pitch at 75% of the radius (out from the centre), but for some reason 2 of those props have been measured at or near the tip, so we can't say what the pitch is when compared to the others. About all I can make out from that document is that most of the props are slightly larger than what you have. Link to comment Share on other sites More sharing options...
Bell Driver Posted April 28, 2021 Author Share Posted April 28, 2021 Though still researching, Sensenich ground adjustable for Jab 2200 is front runner. Link to comment Share on other sites More sharing options...
eightyknots Posted April 28, 2021 Share Posted April 28, 2021 Did you consider using the E-props direct drive propeller? Link to comment Share on other sites More sharing options...
Kyle Communications Posted April 28, 2021 Share Posted April 28, 2021 Its not available yet Hank...they are almost finished testing though Link to comment Share on other sites More sharing options...
Kyle Communications Posted April 28, 2021 Share Posted April 28, 2021 Actually just ordered a Eprop for a guy over there in NZ about to build a savannah Link to comment Share on other sites More sharing options...
eightyknots Posted April 28, 2021 Share Posted April 28, 2021 2 hours ago, Kyle Communications said: Actually just ordered a Eprop for a guy over there in NZ about to build a savannah I will most likely line up for one as well. Link to comment Share on other sites More sharing options...
Recommended Posts
Create an account or sign in to comment
You need to be a member in order to leave a comment
Create an account
Sign up for a new account in our community. It's easy!
Register a new accountSign in
Already have an account? Sign in here.
Sign In Now