---------------------------------------------------------- Glasair-List Digest Archive --- Total Messages Posted Wed 07/18/07: 4 ---------------------------------------------------------- Today's Message Index: ---------------------- 1. 07:55 AM - Re: Props (Craymondw@aol.com) 2. 08:39 AM - speed mods (Craymondw@aol.com) 3. 03:05 PM - more on props (Craymondw@aol.com) 4. 03:59 PM - direction (Craymondw@aol.com) ________________________________ Message 1 _____________________________________ Time: 07:55:32 AM PST US From: Craymondw@aol.com Subject: Re: Glasair-List: Props icovery, IO360 200 hp Lyc and Hartzell ************************************** Get a sneak peek of the all-new AOL at http://discover.aol.com/memed/aolcom30tour ________________________________ Message 2 _____________________________________ Time: 08:39:33 AM PST US From: Craymondw@aol.com Subject: Glasair-List: speed mods I talked to a racer that tried using a lower profile wind screen on his GL 2 TD and claimed the craft didn't have any speed increases with the modification. Ken Johnson said NASA didn't find a problem with the wind screen on his GL 3. Stoddard Hamilton reported an increase in speed by removing the lower belly cowling from the lower cowl. Merrit Island NASA engineers found Glasair two's and three's without wing fairings faster that one's with them. The former aeronautical engineer that worked for Stoddard Hamilton had a retrofit wing fairing that he claimed would add up to fifteen miles per hour to the cruise. Wheel pants on Glasair three's and two's look pretty but aren't well designed. Stoddard Hamilton didn't supply an "upper" nose strut fairing. That fairing is important because it keeps pressurized air out of the cowling. Glasair's retro fitted with RV wheel fairings report several mph increases. The exhaust outlet on the two's face down. Cirrus found that by facing the exhaust out lets to the rear it added thrust and speed. Last night I talked to the builder using a McCauley prop on his Gl 2. He reported that he didn't like the round part of the Hartzell and the thin tip. He went on to say that the last third of a prop does all the work and likes the "tennis racket" look of the McCauly. He also sawed off his wing fairings. His Gl 2 FT is very fast with a cruise speed of 220 mph using a 200 hp Lyc. He is going to remove the Hartzel from his three and install a McCauley and thinks his cruise speed will increase. My best cruise speed with my Hartzell is 2375 rpm. When I increase the RPM the plane goes slower. I think my Hartzel at higher RPM's creates turbulence. ************************************** Get a sneak peek of the all-new AOL at http://discover.aol.com/memed/aolcom30tour ________________________________ Message 3 _____________________________________ Time: 03:05:51 PM PST US From: Craymondw@aol.com Subject: Glasair-List: more on props Formula one racer Don Sharp, tried several prop variations and kept the details of his winning prop a secret. Engine power is another factor. With each replacement to my engine, my plane went faster. I replaced the over hauled Bendix mags on my engine with new Slick mags and experienced better performance. I experimented with engine timing until I noticed increases in speed. I experimented with various spark plugs until settling on Autolight XL UREM38S fine wire plugs. I replaced my injectors with Airflow Performance nozzles and saw a large increase. I ground my exhaust flanges smooth and saw an increase. Maximum power can not be had unless the engine is properly leaned. I lean 50 degrees cool of peak. When I first flew my plane I noticed that my freshly over hauled servo wouldn't hold a setting. So I sent it to a respected overhaul shop and they found the servo had not been properly over hauled and that it wasn't properly adjusted. Even though I had good compression on all cylinders, I suspected one wasn't right when I pulled the prop through. I sent the cylinder in and the mechanic discovered one of the valves had been improperly ground and replaced it and reground the seat. ************************************** Get a sneak peek of the all-new AOL at http://discover.aol.com/memed/aolcom30tour ________________________________ Message 4 _____________________________________ Time: 03:59:07 PM PST US From: Craymondw@aol.com Subject: Glasair-List: direction A GL 2 FT builder that also owns a Gl111 informed me that Stoddard Hamilton decided to get away from high performance aircraft and look into the Glasstar after the manufacturers of the Kitfox convinced them that their way was the better direction. I didn't care for that new direction at all and felt that Stoddard Hamilton was abandoning the Glasair builders and their composite direction. After listening to sales pitches in the late 1980's about how inferior alumni mum was and the future was in composite, Stoddard Hamilton introduced the steel tube, aluminum winged Glasstar. I was part of a group of builders that felt that was a mistake and that a four seat high performance composite version should have been offered instead, followed by a certified version. Also carbon fiber versions of the Gl 2 series and Gl three's should have been introduced. The management of Cirrus and Lancair decided to stick with composites and the Cirrus series of aircraft have become one of the best selling light planes in aviation history closely followed by Columbia aircraft. What a lost opportunity!! I feel that Glasairs with proper speed modifications would not only out perform Lancairs but have superior handling characteristics better than both Lancair and Cirrus designs. Further more, unlike Cirrus designs, I have never heard of unexplained loss of control in adverse weather of any of the Glasair series. And lastly, in the event of an off field landing the survivability in Glasairs appears to greater than their counterparts. ************************************** Get a sneak peek of the all-new AOL at http://discover.aol.com/memed/aolcom30tour ------------------------------------------------------------------------------------- Other Matronics Email List Services ------------------------------------------------------------------------------------- Post A New Message glasair-list@matronics.com UN/SUBSCRIBE http://www.matronics.com/subscription List FAQ http://www.matronics.com/FAQ/Glasair-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/glasair-list Browse Digests http://www.matronics.com/digest/glasair-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.