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05-08-2008, 06:06 PM
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Join Date: Jul 2005
Location: Detroit, MI
Posts: 1,587
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TruTrak Std Rate Turn Again
According to TruTrak, the maximum bank angle if you choose the highest available in the configuration is about 18 degrees. You can't set it for a standard rate turn. Mine is the DigiFlight II. Others have said theirs differ.
I was curious what speed was the upper limit to still get a standard rate turn if bank angle is limited to 18 degrees.
I got the formula from Selkirk College.
According to my computation, the answer is 117-118 KTAS. If you go faster the turn won't be as much as standard rate. Spreadsheet available if you email or PM me.
Just in case anyone wondered. I'm going to test this tomorrow if the WX holds up.
__________________
H. Evan's RV-7A N17HH 240+ hours
"We can lift ourselves out of ignorance, we can find ourselves as creatures of excellence and intelligence and skill. We can be free! We can learn to fly!" -J.L. Seagull
Paid $25.00 "dues" net of PayPal cost for 2015, 2016, 2017 and 2018 (December).
This airplane is for sale: see website. my website
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05-09-2008, 08:20 AM
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Join Date: Jan 2008
Location: Sheridan, IN
Posts: 94
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A rule of thumb for figuring the bank angle required for standard rate turns is:
airspeed in kts/10 +5
118/10 +5 = 17degrees
this is not as accurate as your speadsheet, but is practical
__________________
Drew Cook - K9QV
Sheridan, IN
RV-7 N673AC
Superior IO-360 Horizontal Induction
Hartzell C/S Blended Airfoil
IFR Steam gauges
TruTrak Digiflight IIVS
500 Hours on airframe
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05-09-2008, 01:20 PM
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Join Date: Oct 2007
Location: Alviso, CA
Posts: 405
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How do I set it?
I'd like to turn mine all the way up
__________________
Steve Brown
N598SD - RV9A second owner
O-320, 9:1 pistons, Catto 3 blade
KRHV - Reid Hillview airport, San Jose, CA
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05-09-2008, 03:54 PM
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Join Date: Jul 2005
Location: Detroit, MI
Posts: 1,587
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Three points
Quote:
Originally Posted by SkywayCaptain
A rule of thumb for figuring the bank angle required for standard rate turns is:
airspeed in kts/10 +5
118/10 +5 = 17degrees
this is not as accurate as your speadsheet, but is practical
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The article to which I linked shows the difference between the correct formula and a rule of thumb.
I tried it today. Much to my surprise it held standard rate or more all the way up to 135 kts and looked like it could go even faster. Obviously, the 18 degree thing was wrong. I used it to fly an ILS approach and a hold with excellent results. I can only couple the lateral guidance, not the vertical, of course.
Quote:
Originally Posted by Steve Brown
I'd like to turn mine all the way up
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For the DigiFlight series, hold the mode button in until it enters configuration mode, press other button to advance to next option and so on.
__________________
H. Evan's RV-7A N17HH 240+ hours
"We can lift ourselves out of ignorance, we can find ourselves as creatures of excellence and intelligence and skill. We can be free! We can learn to fly!" -J.L. Seagull
Paid $25.00 "dues" net of PayPal cost for 2015, 2016, 2017 and 2018 (December).
This airplane is for sale: see website. my website
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05-10-2008, 08:38 AM
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Join Date: Jul 2006
Location: Corvallis Oregon
Posts: 3,547
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Pictorial pilot
Have to turn mine up too..I only get half standard rate turns and sometimes I want to fly everything the ATC tells me on the A/P...But I can't cus I'm turning too slow.
How do u max the bank on the PP????
Frank
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