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09-12-2017, 03:21 PM
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Join Date: Jan 2005
Location: Ontario, Canada
Posts: 1,544
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RV14 V speeds
My final inspection is coming up and I need to get some airspeed numbers to enter into the Garmin system.
Specifically I need the top and bottom of the green and white arcs and the Vne of for the aircraft
Thanks in advance.
__________________
Tom Martin RV1 pilot 4.6hours!
CPL & IFR rated
EVO F1 Rocket 1000 hours,
2010 SARL Rocket 100 race, average speed of 238.6 knots/274.6mph
RV4, RV7, RV10, two HRIIs and five F1 Rockets
RV14 Tail dragger
Fairlea Field
St.Thomas, Ontario Canada, CYQS
fairleafield@gmail.com
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09-12-2017, 05:33 PM
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Join Date: Jan 2005
Location: 57AZ - NW Tucson area
Posts: 10,011
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Quote:
Originally Posted by Tom Martin
My final inspection is coming up and I need to get some airspeed numbers to enter into the Garmin system.
Specifically I need the top and bottom of the green and white arcs and the Vne of for the aircraft
Thanks in advance.
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Perhaps the manufacturer knows...
http://vansaircraft.com/pdf/letters/RV-14_V_speeds.pdf
__________________
Gil Alexander
EAA Technical Counselor, Airframe Mechanic
Half completed RV-10 QB purchased
RV-6A N61GX - finally flying
Grumman Tiger N12GA - flying
La Cholla Airpark (57AZ) Tucson AZ
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09-12-2017, 06:16 PM
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Join Date: Jan 2005
Location: Ontario, Canada
Posts: 1,544
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Thanks Gil. I looked at the website and was not able to find it and called the help desk and got some of the numbers but your list is much better.
__________________
Tom Martin RV1 pilot 4.6hours!
CPL & IFR rated
EVO F1 Rocket 1000 hours,
2010 SARL Rocket 100 race, average speed of 238.6 knots/274.6mph
RV4, RV7, RV10, two HRIIs and five F1 Rockets
RV14 Tail dragger
Fairlea Field
St.Thomas, Ontario Canada, CYQS
fairleafield@gmail.com
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09-13-2017, 06:37 AM
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Join Date: May 2012
Location: Ga
Posts: 662
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TAS vs IAS
Carl,
Just wondering what altitude /temp I should use as a reference. Is there some sort of standard? I was thinking about 14,500ft as I usually never go higher even with O2 but my service sealing is 18,000+. I agree completely that we should be using IAS/CAS just like all the other certified manufactures do. Years ago, the speed range was the big selling point. Today, the RV reputation can stand on its own and it's time to put TAS to bed.
Quote:
Originally Posted by RV8JD
I see Van's still lists Vne in terms of True Airspeed (TAS) even for its latest model. I don't think it is enough for Van's to merely state that Vne is in TAS. Pilot's shouldn't have to think in terms of TAS while flying. I think that Van's should state their Vne (Redline) in terms of IAS (or CAS) as a function of altitude, up to the service ceiling of the airplane. Builders may even want to mark their airspeed indicators accordingly.
I know modern EFIS panels with an OAT sensor input can calculate and display TAS, but Van's (or any designer) should accommodate all levels of instrument sophistication.
I would like to see Van's incorporate that change in its future PAP (production acceptance procedure) for the RV-14/14A that it references in their V-Speeds link quoted above.
See this post for a little more discussion:
http://www.vansairforce.com/communit...5&postcount=69
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__________________
Craig
RV-3 Sold
RV-4 Sold
RV-6a Sold
RV-9 IO-360 CS, Built and Flying
Aerostar 600A, Family Hotrod
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09-13-2017, 05:44 PM
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Join Date: May 2012
Location: Ga
Posts: 662
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Cessna Piper
I used 160 on the EFIS as a starting point. Thanks.
I wonder what PIper or Cessna uses for altitude to determine Vne? I'm assuming they use the service ceiling altitude to determine IAS/CAS for Vne. Any ideas?
Quote:
Originally Posted by RV8JD
Craig,
Since Van's now says that Vne is stated as True Airspeed, it is just the conversion of Vne in TAS at each altitude to Calibrated Airspeed (CAS).
I see you have an RV-9, which has a Vne of 210 MPH TAS. So here are the Vne's at several altitudes in terms of MPH IAS. (Note that I have not considered any instrument or position error, therefore Indicated Airspeed equals Calibrated Airspeed. And it uses the Standard Atmosphere.)
I hope that answers your question.
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__________________
Craig
RV-3 Sold
RV-4 Sold
RV-6a Sold
RV-9 IO-360 CS, Built and Flying
Aerostar 600A, Family Hotrod
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