---------------------------------------------------------- Kolb-List Digest Archive --- Total Messages Posted Thu 05/09/13: 17 ---------------------------------------------------------- Today's Message Index: ---------------------- 1. 04:29 AM - Re: Lift Reserve Indicator (Thom Riddle) 2. 07:42 AM - Lift Reserve Indicator (Richard Girard) 3. 08:08 AM - Re: Lift Reserve Indicator (Dennis Rowe) 4. 01:32 PM - Firestar II stall speed... (Arizona Flyer) 5. 02:13 PM - Re: Firestar II stall speed... (Dennis Rowe) 6. 02:22 PM - Re: Firestar II stall speed... (David Kulp) 7. 04:22 PM - Finally (Rex Rodebush) 8. 04:41 PM - Re: Finally (kinne russ) 9. 04:42 PM - Re: Finally (Larlaeb) 10. 04:53 PM - Re: landing gear alignment (Rick Lewis) 11. 04:58 PM - Re: Firestar II stall speed... (t41pilot) 12. 05:04 PM - Re: Re: landing gear alignment (kinne russ) 13. 06:17 PM - Re: Finally (Dennis Rowe) 14. 06:32 PM - Re: Finally (Malcolm Brubaker) 15. 06:59 PM - Re: Finally (Brian and Karon Frey) 16. 07:23 PM - New Purchase of Used Xtra (Brad Nation) 17. 08:34 PM - Re: Firestar II stall speed... (wakataka) ________________________________ Message 1 _____________________________________ Time: 04:29:07 AM PST US Subject: Kolb-List: Re: Lift Reserve Indicator From: "Thom Riddle" Calculating the change in stall speed based on change in weight is pretty easy. The stall speed changes with the square root of the change in flying weight, all other things being equal. Example: Typical flying weight solo 900 lbs., stall speed 40 Add a 200 lb passenger, flying weight becomes 1100 lbs 1100/900 = 1.22 sqrt(1.22) = 1.11 therefore stall speed at 1100 lbs = 44.4 So, for these class of airplanes, adding 5 to indicated speed during approach when carrying a passenger, an often heard bit of advice, is about right. -------- 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=400188#400188 ________________________________ Message 2 _____________________________________ Time: 07:42:08 AM PST US Subject: Kolb-List: Lift Reserve Indicator From: Richard Girard I sent the article to start a discussion since the Kolb list has been pretty quiet these days and it achieved that goal. In defense of the idea, where is that most stall/spin accidents occur? At low speeds while approaching or departing an airport. Jim's indicator, as you can see from the picture, is located at the top of his panel where it can attract attention during that critical phase when the pilot's eyes should be outside the cockpit looking for traffic. We've lost one list member to a landing stall/spin on his very first flight in his newly completed IIIX. Would an LRI helped? No way to know, but angle of attack gauges are the latest rage to combat the stall/spin accident and Jim came up with a homebuilder's solution that's inexpensive and uncomplicated. Rick Girard -- Zulu Delta Mk IIIC Thanks, Homer GBYM It isn't necessary to have relatives in Kansas City in order to be unhappy. - Groucho Marx ________________________________ Message 3 _____________________________________ Time: 08:08:04 AM PST US Subject: Re: Kolb-List: Lift Reserve Indicator From: Dennis Rowe I read below that we lost a member in a stall spin accident, I've been off l ist for quite a while and had missed this. I'm saddened to hear, but have to ask who it was? Skid Rowe Mk 3 2si 690, PA Do not archive On May 9, 2013, at 10:41 AM, Richard Girard wrote: > I sent the article to start a discussion since the Kolb list has been pret ty quiet these days and it achieved that goal. > In defense of the idea, where is that most stall/spin accidents occur? At l ow speeds while approaching or departing an airport. Jim's indicator, as you can see from the picture, is located at the top of his panel where it can a ttract attention during that critical phase when the pilot's eyes should be o utside the cockpit looking for traffic. > We've lost one list member to a landing stall/spin on his very first fligh t in his newly completed IIIX. Would an LRI helped? No way to know, but angl e of attack gauges are the latest rage to combat the stall/spin accident and Jim came up with a homebuilder's solution that's inexpensive and uncomplica ted. > > Rick Girard > > -- > Zulu Delta > Mk IIIC > Thanks, Homer GBYM > > It isn't necessary to have relatives in Kansas City in order to be unhappy .. > - Groucho Marx > > > ========================== ========= ========================== ========= ========================== ========= ========================== ========= > ________________________________ Message 4 _____________________________________ Time: 01:32:36 PM PST US Subject: Kolb-List: Firestar II stall speed... From: "Arizona Flyer" I bought a pre owned Firestar II and all my research indicated a 30mph stall speed. I was shocked on my first landing at my short airstrip when it dropped from about 4ft. and bounced hard yikes! No damage but I approached at 42mph and backed it off just before the runway threshold, a quick glance showed 36mph right before it stalled which would be 35mph. My Firestar log book list the weight at 419 lbs. I am so fortunate I was not higher when this happened. This makes me concerned for other new Firestar pilots who may also experience this somewhat dangerous surprise with a 30mph stall speed in mind. I would have never tried to slow it down so much on a longer runway but I had to for the short strip. On the next 3 landings I kept 42mph approach and 40mph at threshold and held that speed until my wheels were 1ft or 2ft above the ground then cut power and did well then. Is 419 lbs heavy or around normal for this airplane? Is 35mph stall speed common? I've spent a few days extending my runway to accommodate for a 5 mph faster Firestar than I expected. I have learned a lot from the fine folks on this forum. I just joined to make my first post. I will do my best to be a valuable contributor here. Thanks for any replies :) -------- "Life should be lived as a bold adventure, I refuse to tiptoe through life just to arrive safely at death" Read this topic online here: http://forums.matronics.com/viewtopic.php?p=400204#400204 ________________________________ Message 5 _____________________________________ Time: 02:13:49 PM PST US Subject: Re: Kolb-List: Firestar II stall speed... From: Dennis Rowe Welcome, You have an experimental bird with an uncertified pitot static system. Test fly at the largest field available, practice stalls at altitude to learn the indicated airspeed at stall and as with all high drag, low weight aircraft fly it down to a foot high before you flare. Dennis Skid Rowe Mk3, PA On May 9, 2013, at 4:32 PM, "Arizona Flyer" wrote: > > I bought a pre owned Firestar II and all my research indicated a 30mph stall speed. I was shocked on my first landing at my short airstrip when it dropped from about 4ft. and bounced hard yikes! No damage but I approached at 42mph and backed it off just before the runway threshold, a quick glance showed 36mph right before it stalled which would be 35mph. My Firestar log book list the weight at 419 lbs. I am so fortunate I was not higher when this happened. This makes me concerned for other new Firestar pilots who may also experience this somewhat dangerous surprise with a 30mph stall speed in mind. I would have never tried to slow it down so much on a longer runway but I had to for the short strip. On the next 3 landings I kept 42mph approach and 40mph at threshold and held that speed until my wheels were 1ft or 2ft above the ground then cut power and did well then. Is 419 lbs heavy or around normal for this airplane? Is 35mph stall speed common? I've spent a few days extend! > ing my runway to accommodate for a 5 mph faster Firestar than I expected. I have learned a lot from the fine folks on this forum. I just joined to make my first post. I will do my best to be a valuable contributor here. Thanks for any replies :) > > -------- > "Life should be lived as a bold adventure, I refuse to tiptoe through life just to arrive safely at death" > > > > > Read this topic online here: > > http://forums.matronics.com/viewtopic.php?p=400204#400204 > > > > > > > > > > ________________________________ Message 6 _____________________________________ Time: 02:22:56 PM PST US From: David Kulp Subject: Re: Kolb-List: Firestar II stall speed... Also, something my flight instructor taught me taking GA lessons; if you stall too high above the runway, goose the throttle as soon as you feel it break and you'll touch down a lot gentler. Happened again a few hours later concentrating too hard on gusty cross winds, and it works!! Dave Kulp Bethlehem, PA FireFly 11DMK On 5/9/2013 5:13 PM, Dennis Rowe wrote: > > Welcome, > You have an experimental bird with an uncertified pitot static system. Test fly at the largest field available, practice stalls at altitude to learn the indicated airspeed at stall and as with all high drag, low weight aircraft fly it down to a foot high before you flare. > > Dennis Skid Rowe > Mk3, PA > > On May 9, 2013, at 4:32 PM, "Arizona Flyer" wrote: > >> >> I bought a pre owned Firestar II and all my research indicated a 30mph stall speed. I was shocked on my first landing at my short airstrip when it dropped from about 4ft. and bounced hard yikes! No damage but I approached at 42mph and backed it off just before the runway threshold, a quick glance showed 36mph right before it stalled which would be 35mph. My Firestar log book list the weight at 419 lbs. I am so fortunate I was not higher when this happened. This makes me concerned for other new Firestar pilots who may also experience this somewhat dangerous surprise with a 30mph stall speed in mind. I would have never tried to slow it down so much on a longer runway but I had to for the short strip. On the next 3 landings I kept 42mph approach and 40mph at threshold and held that speed until my wheels were 1ft or 2ft above the ground then cut power and did well then. Is 419 lbs heavy or around normal for this airplane? Is 35mph stall speed common? I've spent a few days exte! > nd! >> ing my runway to accommodate for a 5 mph faster Firestar than I expected. I have learned a lot from the fine folks on this forum. I just joined to make my first post. I will do my best to be a valuable contributor here. Thanks for any replies :) >> >> -------- >> "Life should be lived as a bold adventure, I refuse to tiptoe through life just to arrive safely at death" >> >> >> >> >> Read this topic online here: >> >> http://forums.matronics.com/viewtopic.php?p=400204#400204 >> >> >> >> >> >> >> >> >> >> > > ________________________________ Message 7 _____________________________________ Time: 04:22:15 PM PST US Subject: Kolb-List: Finally From: "Rex Rodebush" Finally received my Airworthiness Certificate today after about 13+ years of on and off building! Rex Rodebush Mark III X-tra with 912S Read this topic online here: http://forums.matronics.com/viewtopic.php?p=400217#400217 ________________________________ Message 8 _____________________________________ Time: 04:41:10 PM PST US Subject: Re: Kolb-List: Finally From: kinne russ Rex: Where are you located? Russ K On May 9, 2013, at 7:22 PM, Rex Rodebush wrote: > > Finally received my Airworthiness Certificate today after about 13+ years of on and off building! > > Rex Rodebush > Mark III X-tra with 912S > > > > > Read this topic online here: > > http://forums.matronics.com/viewtopic.php?p=400217#400217 > > > > > > > > > > ________________________________ Message 9 _____________________________________ Time: 04:42:19 PM PST US Subject: Kolb-List: Re: Finally From: "Larlaeb" Way to go! :D Read this topic online here: http://forums.matronics.com/viewtopic.php?p=400218#400218 ________________________________ Message 10 ____________________________________ Time: 04:53:32 PM PST US Subject: Kolb-List: Re: landing gear alignment From: "Rick Lewis" It would have been so nice, Russ, for you to have been honest with me about having no intension of buying my plane. This would have saved me a lot of work getting things ready for you to look at......... -------- Rick Lewis (VW Watercooled Engine) Read this topic online here: http://forums.matronics.com/viewtopic.php?p=400221#400221 ________________________________ Message 11 ____________________________________ Time: 04:58:31 PM PST US Subject: Kolb-List: Re: Firestar II stall speed... From: "t41pilot" I also had the same "Surprise" with my Firefly on the first couple of landings. The approach looks good and then Bango. My firefly puts on the brakes as soon as power is removed, so now I carry some rpm all the way to flare and then back it off for touchdown. I do my approaches between 45 and 50 with no flap. I know Kolbs can land short. It's just a matter of power management and flap. I'm still doing the no flap approach because my landings are better at the quicker speed. But with more experience I know I can land shorter. As far as Airspeed calibration, I compared my indicated airspeed to my GPS ground speed on a calm day and they were within 1 mph. I use a dual static port setup. One on each side of my nosecone. I made homemade ones by drilling out 1/4 inch Nylon bolts through the centers lengthwise and holding them in place with nylon nuts. Head of the bolt outside and the nuts inside with some thread to spare for air tubing hookup. Then I just slipped the static air tubing over the ends and clamped in place. The tubing fit tightly over the threads as it was but clamps make good insurance. The cost is next to nothing. If you find an airspeed problem, check the incidence of the pitot tube. If your indicated airspeed is Ok then you are in the same boat as me. Just practice...practice...practice with a little sight seeing in between. -------- Gregg Kaat 2011 Firefly Read this topic online here: http://forums.matronics.com/viewtopic.php?p=400223#400223 ________________________________ Message 12 ____________________________________ Time: 05:04:32 PM PST US Subject: Re: Kolb-List: Re: landing gear alignment From: kinne russ I am hurt by your comments! -- I DID have intentions of buying your plane, and am an honest man. I wouldn't do that to you, or anyone else. I'm not that kind of person. Russ K On May 9, 2013, at 7:53 PM, Rick Lewis wrote: > > It would have been so nice, Russ, for you to have been honest with me about having no intension of buying my plane. This would have saved me a lot of work getting things ready for you to look at......... > > -------- > Rick Lewis > > (VW Watercooled Engine) > > > > > Read this topic online here: > > http://forums.matronics.com/viewtopic.php?p=400221#400221 > > > > > > > > > > ________________________________ Message 13 ____________________________________ Time: 06:17:26 PM PST US Subject: Re: Kolb-List: Finally From: Dennis Rowe Big Congrats!!!!!! Do not archive Skid Rowe On May 9, 2013, at 7:22 PM, "Rex Rodebush" wrote: > > Finally received my Airworthiness Certificate today after about 13+ years of on and off building! > > Rex Rodebush > Mark III X-tra with 912S > > > > > Read this topic online here: > > http://forums.matronics.com/viewtopic.php?p=400217#400217 > > > > > > > > > > ________________________________ Message 14 ____________________________________ Time: 06:32:10 PM PST US From: Malcolm Brubaker Subject: Re: Kolb-List: Finally =0A=0A=0AMalcolm & Jeanne Brubaker =0AMichigan Sport Pilot Repair =0Ahttp: //michigansportpilotrepair.com/ =0ALSRM-A, PPC, WS=0AGreat Sails - Sailmake r =0Afor Ultralight & Light Sport=0A(989)513-3022 =0A- =0A=0A=0A=0A =0A =0A________________________________=0A From: Rex Rodebush =0ATo: kolb-list@matronics.com =0ASent: Thursday, May 9, 2013 7:22 PM Rex Rodebush" =0A=0AFinally received my Airworthiness Certificate today after about 13+ years of on and off building!=0A=0ARex R odebush=0AMark III X-tra- with 912S=0A=0A=0A=0A=0ARead this topic online here:=0A=0Ahttp://forums.matronics.com/viewtopic.php?p=400217#400217=0A =========================0A =================== ________________________________ Message 15 ____________________________________ Time: 06:59:06 PM PST US From: "Brian and Karon Frey" Subject: Re: Kolb-List: Finally Congrats Rex Brian Frey ----- Original Message ----- From: "Rex Rodebush" Sent: Thursday, May 09, 2013 6:22 PM Subject: Kolb-List: Finally > > Finally received my Airworthiness Certificate today after about 13+ years > of on and off building! > > Rex Rodebush > Mark III X-tra with 912S > > > Read this topic online here: > > http://forums.matronics.com/viewtopic.php?p=400217#400217 > > > ________________________________ Message 16 ____________________________________ Time: 07:23:34 PM PST US From: Brad Nation Subject: Kolb-List: New Purchase of Used Xtra I will be purchasing a used Xtra with a 912 100hp Rotax shortly as this will be my first airplane purchase this will be unfamiliar territory. Any pointers and suggestions on the buying process and evaluating the airplane would be appreciated. Are there any specifics related to the Kolb/Kolb Xtra or Rotax that I should be looking for? I'm so excited! Once again, thanks in advance, Brad ________________________________ Message 17 ____________________________________ Time: 08:34:40 PM PST US Subject: Kolb-List: Re: Firestar II stall speed... From: "wakataka" I had the same experience on the first few landings with my Firestar 1. If you bring it in slow, it will just quit flying all at once about the time you expect it to begin to settle. So far, I've found that wheel landings work better the stall landings. That way you can bring it in a little hot and avoid that sinking feeling when it quits flying before you're ready. That doesn't work so well on short fields, though. I've only got about 30 hours in the Firestar so I'm sure there's things I've yet to learn about it, but so far it seems like a very honest little airplane with only a few minor quirks. -------- There is something fascinating about science. One gets such wholesale returns of conjecture out of such a trifling investment of fact. 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