---------------------------------------------------------- RV7-List Digest Archive --- Total Messages Posted Thu 12/15/05: 2 ---------------------------------------------------------- Today's Message Index: ---------------------- 1. 08:25 AM - Re: Phantasm Facts (Norman Younie) 2. 09:06 AM - Re: Phantasm Facts (LessDragProd@aol.com) ________________________________ Message 1 _____________________________________ Time: 08:25:45 AM PST US From: Norman Younie Subject: Re: RV7-List: Phantasm Facts --> RV7-List message posted by: Norman Younie I hope you guys all realize that the only way to make these planes fly faster is money. Merry Christmas all. Dan Checkoway wrote: > Huh?! > Vne on the RV-7[A] is 230mph or 200knots. You mean to tell us you're > getting 200 knots true? Sorry, I don't buy it. I assume you're > kidding, in the spirit of this silly thread & made-up data? > )_( Dan > RV-7 N714D (724 hours) > http://www.rvproject.com > > ----- Original Message ----- > *From:* T Bryant > *To:* rv7-list@matronics.com > *Sent:* Wednesday, December 14, 2005 3:09 PM > *Subject:* Re: RV7-List: Phantasm Facts (was: changing props (Dear > Jim why MT?)) > > Yep that it is... entertaining! AFA props and engines etc. What I > know is that the 72 inch CS Hartzell Blended airfoil prop on a > AeroSport IO360/180 will drive a RV7A past Vne TAS at 7000 ft. > What else matters? > Tyler B N442TM > > > Rick Rammos wrote: > >> You cant pay for this kind of entertainment. Hell, I might even >> learn something. >> >> >> *From:* owner-rv7-list-server@matronics.com >> [mailto:owner-rv7-list-server@matronics.com] *On Behalf Of >> *LessDragProd@aol.com >> *Sent:* Wednesday, December 14, 2005 3:21 PM >> *To:* rv7-list@matronics.com >> *Subject:* RV7-List: Phantasm Facts (was: changing props (Dear >> Jim why MT?)) >> >> Good Morning Again George, >> >> You said, "YOU CAN'T GO FASTER ON LESS HP!" >> >> Using the data point you choose, and I quote: >> >> SWEET SPOT? You show the MTV-12 at 2300 RPM at 2500 going 186 >> mph, but at 12,500 you are going 191mph????? Impossible! Why? >> You have >> 156HP @ 2300 RPM at 2,500 ft. At 12,500 ft the best you could >> do is >> 115HP (@ 2300 RPM). 6 MPH faster on 40HP less power! >> >> According to the Lycoming data for the O-360 engine used and the >> actual flight conditions, the engine was producing 134 hp at >> 2,500 feet and 103 hp at 12,500 feet. >> >> As might be expected, the indicated airspeed at 2,500 feet was >> higher than the indicated airspeed at 12,500 feet. >> >> Specifically, 176 mph ias at 2,500 feet and 150 mph ias at 12,500 >> feet. >> >> When corrected for the density altitude, the True Indicated >> Airspeed was 187 mph at 2,500 feet and 191 mph at 12,500 feet. >> (These are the summary numbers shown in the website data.) >> >> And that's how you go faster on less power. >> >> And theatrically, on 2.6 gph less fuel. (With a greater fuel >> savings at altitude, if the aircraft owner is unwilling to lean >> to 30 degrees C ROP at the lower altitudes and higher power >> settings achievable 3.3 gph decrease shown in the website data.) >> >> Regards, >> >> Jim Ayers >> >> www.lessdrag.com >> >> The website data being discussed is on the "Lycoming O-360 >> propeller" page. Just open the page and scroll down to it. >> > ________________________________ Message 2 _____________________________________ Time: 09:06:24 AM PST US From: LessDragProd@aol.com Subject: Re: RV7-List: Phantasm Facts Everyone keeps telling me that MT Propeller has already figured that out. :-) Happy Holidays all, Jim Ayers In a message dated 12/15/2005 8:32:03 AM Pacific Standard Time, rv6capt@pacificcoast.net writes: --> RV7-List message posted by: Norman Younie I hope you guys all realize that the only way to make these planes fly faster is money. Merry Christmas all.