---------------------------------------------------------- Kolb-List Digest Archive --- Total Messages Posted Mon 10/07/13: 4 ---------------------------------------------------------- Today's Message Index: ---------------------- 1. 01:23 AM - Re: Kolb FireFly at High Altitude (JC Gilpin) 2. 05:27 AM - Re: Firefly at High Altitude (Thom Riddle) 3. 06:36 AM - Re: Firefly at High Altitude (Thom Riddle) 4. 03:11 PM - Beauford's Firefly (George Alexander) ________________________________ Message 1 _____________________________________ Time: 01:23:19 AM PST US Subject: Kolb-List: Re: Kolb FireFly at High Altitude From: JC Gilpin I flew my 40hp FireFly off 7000+ft strips a couple of times, no problem. And many times climbed to 10,000ft, no problem, still climbing at 200fpm. And that's without re-jetting for that altitude, so EGTs were down around 800F..... I weigh 165lb. This wasn't on really hot days, but not brisk either. You really do need to heed the change in density altitude with increasing temp..... Longer wing FireStar would definitely be better. The real shortcoming of the FireFly is that too short 22ft wing..... JG ________________________________ Message 2 _____________________________________ Time: 05:27:19 AM PST US Subject: Kolb-List: Re: Firefly at High Altitude From: "Thom Riddle" I have a spreadsheet that was written by some aeronautical engineer and published either on EAA's website or CAFE website (can't remember after so many years) that predicts performance of a light aircraft when plugging in specific physical attributes of the airplane. I plugged in the known values for the 40 hp Rotax powered Firefly and this spreadsheet predicts a service ceiling(where climb degrades to 100 fpm) of about 12,010' density altitude at gross wt of 550 lb. These numbers seem reasonable to me. As Beauford said, the longer wing Firestar, though a bit heavier, should have a bit higher ceiling. With same engine and an extra 100 lb of airframe the spreadsheet predicts a service ceiling of about 13,300' DA. Having owned a 35 hp Firestar and also a 40 hp Firestar, these figures seem reasonable too, though I never flew either Firestar over about 8,000' DA. -------- Thom Riddle Buffalo, NY (9G0) Don't worry about old age... it doesn't last very long. - Anonymous Read this topic online here: http://forums.matronics.com/viewtopic.php?p=409984#409984 ________________________________ Message 3 _____________________________________ Time: 06:36:50 AM PST US Subject: Kolb-List: Re: Firefly at High Altitude From: "Thom Riddle" In case anyone is interested in the spreadsheet I mentioned in my previous post, here is a link to it on Google Docs. You should be able to down load it and modify it for your own use. https://docs.google.com/spreadsheet/ccc?key=0Ap6b4DzV2dGZdGVsWGxrdHJFRzBfT3V1N0dLWGp3N0E&usp=sharing The YELLOW fields are for the user to fill in. The BLUE fields are calculated estimates for various parameters. The numbers in the spreadsheet now are for the 40 hp Firestar I used to fly. -------- Thom Riddle Buffalo, NY (9G0) Don't worry about old age... it doesn't last very long. - Anonymous Read this topic online here: http://forums.matronics.com/viewtopic.php?p=409988#409988 ________________________________ Message 4 _____________________________________ Time: 03:11:19 PM PST US Subject: Kolb-List: Beauford's Firefly From: "George Alexander" Not nearly the quality of other videos being posted.... but not bad for a smart phone held by a not-so-smart operator. http://youtu.be/-NmaN9yLuOQ -------- George Alexander FS II R503 N709FS http://www.oh2fly.net Read this topic online here: http://forums.matronics.com/viewtopic.php?p=410021#410021 ------------------------------------------------------------------------------------- Other Matronics Email List Services ------------------------------------------------------------------------------------- Post A New Message kolb-list@matronics.com UN/SUBSCRIBE http://www.matronics.com/subscription List FAQ http://www.matronics.com/FAQ/Kolb-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/kolb-list Browse Digests http://www.matronics.com/digest/kolb-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.