Thanks Mark ----- Original Message ----- From: "Mark Langford via KRnet" <[email protected]> To: "KRnet" <[email protected]> Cc: "Mark Langford" <[email protected]> Sent: Wednesday, January 25, 2017 8:18:11 PM Subject: Re: KR> stall speed
Bob Russell wrote: > What are realistic stall speeds with flaps? As Larry said, you'll want to go to altitude and stall it several times to get the "indicated" stall speed, because airspeed indicators are notoriously inaccurate at low speeds...even the fancy new electronic versions that I've used are off at the lower end of the spectrum. For example, N891JF stalls "hard" (nose over) at about 36 mph indicated, and that's on the MGL iEFIS. This isn't far from what Jim Faughn reported in his "how to land a KR" treatise, but those are indicated. GPS stall speed is closer to the low fifties, at the altitudes that I practice stalls at. If you are asking what's the difference in stall speed with "plans-built" flaps, my guess would be about two mph, three mph at the most, based on my experience with the much larger flaps on N56ML. KR2S N56ML stalls at 57 mph with barn door flaps, 62 mph clean at "average" loading conditions. KR2 N891JF stalls slightly slower, and even the belly board drops stall speed 1.5-2 mph. These are all GPS speeds, taken on calm days in two directions probably at 4000' or so, so it'll be a little less nearer to sea level...which you don't want to do. You can extrapolate it though...about a 2% difference per thousand feet. You probably already know this though. More stall speeds are listed at http://www.krnet.org/kr-info.html , although their accuracy is not assured. Speaking of which, nobody's sent me information for a newly minted airplane for probably five years. No new KRs are flying for five years? Please do some testing and send me your numbers... Mark Langford [email protected] http://www.n56ml.com _______________________________________________ Search the KRnet Archives at http://tugantek.com/archmailv2-kr/search. Please see LIST RULES and KRnet info at http://www.krnet.org/info.html. see http://list.krnet.org/mailman/listinfo/krnet_list.krnet.org to change options To UNsubscribe from KRnet, send a message to [email protected] _______________________________________________ Search the KRnet Archives at http://tugantek.com/archmailv2-kr/search. Please see LIST RULES and KRnet info at http://www.krnet.org/info.html. see http://list.krnet.org/mailman/listinfo/krnet_list.krnet.org to change options To UNsubscribe from KRnet, send a message to [email protected]
