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01-29-2018, 10:55 PM
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Join Date: Jan 2015
Location: uk
Posts: 57
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Quote:
Originally Posted by N941WR
207 mph TAS is not beyond the Vne of 210 mph TAS. It is close, very very close.
Allan must have some tricks up his sleeve because my O-360 powered -9 tail dragger will hit the wall right at 200 MPH / 175 knots, which is just fine by me.
His comments about flying high are right on the mark. Even at 17.5 the -9 is still flying nose down. Whereas the short wing RV's are flying nose up at those altitudes.
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The point is that those speeds are getting near the edge for the RV9. Read the warning on the Vans web page link. That is dangerous territory for the 9. Good luck if you go there deliberately.
It?s not chance that link is only on the 9 page. The dangers are there for any aircraft but it?s a tighter corner for the 9.
As for how Alan gets that extra 7mph. Well I?ve seen all sorts of things claimed on the internet, I certainly don?t believe it all. Let?s hope however it?s done that he has covered the dangers inherent in that speed in the 9.
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01-30-2018, 06:35 AM
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Join Date: Sep 2010
Location: Redlands, Ca.
Posts: 1,458
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Quote:
Originally Posted by ChiefPilot
Tom wasn't referencing Vne. Max structural cruise speed, Vno, is something different.
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....Only cruise in smooth air at the quoted speeds, and have
performed many mods to add some extra strength in critical
areas. We may offer some more of these mods on our website
in the future. We see lots of interest in these, but are still in
the testing stage at present. Thanks, Allan 
__________________
Allan Nimmo
AntiSplatAero.com
Innovative Aircraft Safety
Products, Tools & ServicesInfo@AntiSplatAero.com Southern California (KREI)
RV-9A / Edge-540 
(909) 824-1020
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01-30-2018, 09:07 AM
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Join Date: Jan 2005
Location: SC
Posts: 12,887
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Quote:
Originally Posted by ChiefPilot
The picture you posted earlier in this thread, in post #8, shows this to be false.
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Looks pretty level to me. Besides, the -9 seems to fly more nose down than the short wing RV's. At that altitude, it is still nose down, just not as much as at 8,500'
__________________
Bill R.
RV-9 (Yes, it's a dragon tail)
O-360 w/ dual P-mags
Build the plane you want, not the plane others want you to build!
SC86 - Easley, SC
www.repucci.com/bill/baf.html
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01-30-2018, 09:13 AM
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Join Date: Jan 2005
Location: SC
Posts: 12,887
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Quote:
Originally Posted by ChiefPilot
Tom wasn't referencing Vne. Max structural cruise speed, Vno, is something different.
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Good point but is Vno TAS or IAS?
__________________
Bill R.
RV-9 (Yes, it's a dragon tail)
O-360 w/ dual P-mags
Build the plane you want, not the plane others want you to build!
SC86 - Easley, SC
www.repucci.com/bill/baf.html
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01-30-2018, 09:18 AM
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Join Date: Jan 2005
Location: SC
Posts: 12,887
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[quote=tomww;1235892]The point is that those speeds are getting near the edge for the RV9. ... [/url]
Yep, they are close but not over.
It is up to the pilot to manage the speed. Even an O-235 powered -9(A) can hit those numbers going downhill.
__________________
Bill R.
RV-9 (Yes, it's a dragon tail)
O-360 w/ dual P-mags
Build the plane you want, not the plane others want you to build!
SC86 - Easley, SC
www.repucci.com/bill/baf.html
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01-30-2018, 09:18 AM
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Join Date: May 2012
Location: Ga
Posts: 662
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AIRSPeed
Vno is indicated and Vne is true. Interesting huh?
Somewhere north of 8500ft, Indicated becomes secondary to True AIRSPeed.
__________________
Craig
RV-3 Sold
RV-4 Sold
RV-6a Sold
RV-9 IO-360 CS, Built and Flying
Aerostar 600A, Family Hotrod
Last edited by grubbat : 01-30-2018 at 09:21 AM.
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01-30-2018, 09:43 AM
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Join Date: Jan 2005
Location: Twin Cities, MN
Posts: 1,565
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Quote:
Originally Posted by N941WR
Looks pretty level to me. Besides, the -9 seems to fly more nose down than the short wing RV's. At that altitude, it is still nose down, just not as much as at 8,500'
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The PFD does not show any kind of "nose down" indication. And, "Looks pretty level to me" would seem to contradict "it is still nose down".
__________________
Brad Benson, Maplewood MN.
RV-6A N164BL, Flying since Nov 2012!
If you're not making mistakes, you're probably not making anything
Last edited by ChiefPilot : 01-30-2018 at 09:53 AM.
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01-30-2018, 10:34 AM
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Join Date: Jan 2005
Location: SC
Posts: 12,887
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Quote:
Originally Posted by ChiefPilot
The PFD does not show any kind of "nose down" indication. And, "Looks pretty level to me" would seem to contradict "it is still nose down".
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That might be because "level flight" is nose down and the EFIS is so calibrated.
__________________
Bill R.
RV-9 (Yes, it's a dragon tail)
O-360 w/ dual P-mags
Build the plane you want, not the plane others want you to build!
SC86 - Easley, SC
www.repucci.com/bill/baf.html
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01-30-2018, 10:58 AM
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Join Date: Jul 2005
Location: Hubbard Oregon
Posts: 9,035
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Regarding smooth air......
The two worst turbulence events I have had in my flying career (both while flying RV's at high speed cruise and bad enough to cause major head impact on the canopy even with very tight belts) were surely encounters with wake turbulence, since the air had been glassy smooth for the previous 1/2 hr and it was for the half hour after the event.
__________________
Opinions, information and comments are my own unless stated otherwise. They do not necessarily represent the direction/opinions of my employer.
Scott McDaniels
Van's Aircraft Engineering Prototype Shop Manager
Hubbard, Oregon
RV-6A (aka "Junkyard Special ")
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01-30-2018, 11:42 AM
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Join Date: Jan 2005
Location: SC
Posts: 12,887
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Quote:
Originally Posted by rvbuilder2002
The two worst turbulence events I have had in my flying career (both while flying RV's at high speed cruise and bad enough to cause major head impact on the canopy even with very tight belts) were surely encounters with wake turbulence, since the air had been glassy smooth for the previous 1/2 hr and it was for the half hour after the event.
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Ditto for me. Even bruised my shins from hitting the bottom of the panel.
__________________
Bill R.
RV-9 (Yes, it's a dragon tail)
O-360 w/ dual P-mags
Build the plane you want, not the plane others want you to build!
SC86 - Easley, SC
www.repucci.com/bill/baf.html
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