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-   -   Great speeds in an RV (https://vansairforce.net/community/showthread.php?t=177413)

partner14 12-03-2019 07:39 AM

Great speeds in an RV
 
I was encouraged to post this on Van's Air Force's website, so here goes. After all the terrible weather last week, we needed a window of decent weather to return to Texas from SoCal. We had no idea of just how great the flight would be. Kind of wondering if anyone else has seen these kind of ground sppeds in their RV's. Flying with half throttle, 2,230rpm, climbing at 200fpm, at 15,480', and LOP, we saw . IAS = 154mph, TAS = 198mph, Ground Speed (GPS) = 266kts, or 306mph, wind speed = 110mph.
The second picture taken 72nm earlier shows 301mph, climbing 300fpm, and 8.7gph, which is almost 35mpg.
https://www.facebook.com/photo.php?fbid=3557500467608318&set=pcb.3557530554 271976&type=3&__tn__=HH-R&eid=ARChiHpFgvOyTT2DTMlmONLmpDoeN3HwBZa_ebCJrFHy 8PeMTFxBwMNSwxrWJ-6q6Z21bv0e_uVSabuQ[/IMG]
https://www.facebook.com/photo.php?fbid=3557507254274306&set=pcb.3557530554 271976&type=3&__tn__=HH-R&eid=ARAW_P0xD4pKnYu3G6N3XZBwJrN4ed_Fm7bXWLmLn0G2 U0x2nWjRUJHcOfSvgw4-6dTBN8xC4rw7aP9M[/IMG]

Don McDonald 0TX1
RV10 40636 1,100 hours and loving it.

brad walton 12-03-2019 08:19 AM

I guess we need a new category, the "300 mph club".

NewbRVator 12-03-2019 08:58 AM

?IAS = 154mph, TAS = 198mph, Ground Speed (GPS) =306mph?


I love it. Were you nervous in the event you hit unexpected turbulence at that speed?
Cheers

wcalvert 12-03-2019 09:04 AM

Winds were huge last week... as long as you were eastbound!

IAS is all that matters

wcalvert 12-03-2019 09:05 AM

"IAS is all that matters" when it comes to turbulence penetration speed is what I should say.

partner14 12-03-2019 09:19 AM

Turbulence
 
I guess I could have mentioned that the ride the entire 1044nm was as smooth as silk.... with the exception of the last 800' prior to landing in Texas.

Steve Melton 12-03-2019 10:18 AM

I think we need a 300 mph club. My max is 260 mph but I could have been closer to 300 if I had climbed. Yeah, it was smooth in-flight but wicked on the ground.

Paul 5r4 12-03-2019 11:57 AM

My max GPS ground speed to date is 240 mph. I agree with others that your IAS is all important regarding turbulence but on everything else I LOVE the ground speeds I see in these planes. After all, it IS the number that will tell you exactly when you'll arrive at the destination. I tell my non-aviation passengers that this speed is what you would see on the speedometer if you were driving. Thay can relate and it never fails to impress.

RVDan 12-03-2019 03:16 PM

Real aviators use knots and NM. :D
While the groundspeed data is reliable, a real measure of performance from the airplane is TAS. Of course PA and engine power have to be factored in.

partner14 12-03-2019 03:46 PM

;)Wow, hey thanks for the information. I'm sure hardly anyone flying an RV knew any of the things you mentioned.


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