Anyone who has followed the build thread for 94CR will know that I am very new to flying this RV, and will likely be full of questions in the near future. The first of these relates to some testing I did yesterday at altitude.
I climbed to 8k msl (DA was lower due to the cold, but I forgot to look and see how much) and performed four runs (N, S, E & W) at the same indicated airspeed to compare with groundspeed, check TAS, 75% performance, etc.
(Almost) Full throttle running just ROP, I snapped the following photos:
I have all of the fairings on the plane except the one that transitions between nose leg faring and bottom of the cowl. Running the numbers through an online calculator, I'm showing that 154 indicated in those conditions = about 171kts TAS. I saw "almost" full throttle because all-in, the Sensenich FP on this carbureted o-360 wants to spin 2900rpm, so I pulled it back slightly at first, and then even more which is why two of the runs show an indicated of about 150kts.
My questions are these: Is this typical performance from a 6A thusly equipped? Am I looking at the correct performance markers (MP/IAS/TAS/%power, etc)?
Perhaps more importantly, is the Sensenich prone to overspeeding in the RV, and what would be the pro's and cons of having it (or putting on something else which is) pitched to turn right at 2700 rpm max?
I hope these aren't total NOOB ?'s, but, as they say, you don't know what you don't know... Not to mention, I've got a ton of learning to do just to figure out how to set up this GRT! I'm mostly just flying the plane at this point, but I did enough digging around the AP to set it to fly a 500fpm descent. Kind of cool to see it nail the VS and keep it there, and to be able to steer using the heading bug! What someone needs to do is to put together some instructional video's on the GRT Sport and upload them to youtube! It's one thing to read the manual, but another entirely to really understand what's going on...
I climbed to 8k msl (DA was lower due to the cold, but I forgot to look and see how much) and performed four runs (N, S, E & W) at the same indicated airspeed to compare with groundspeed, check TAS, 75% performance, etc.
(Almost) Full throttle running just ROP, I snapped the following photos:
I have all of the fairings on the plane except the one that transitions between nose leg faring and bottom of the cowl. Running the numbers through an online calculator, I'm showing that 154 indicated in those conditions = about 171kts TAS. I saw "almost" full throttle because all-in, the Sensenich FP on this carbureted o-360 wants to spin 2900rpm, so I pulled it back slightly at first, and then even more which is why two of the runs show an indicated of about 150kts.
My questions are these: Is this typical performance from a 6A thusly equipped? Am I looking at the correct performance markers (MP/IAS/TAS/%power, etc)?
Perhaps more importantly, is the Sensenich prone to overspeeding in the RV, and what would be the pro's and cons of having it (or putting on something else which is) pitched to turn right at 2700 rpm max?
I hope these aren't total NOOB ?'s, but, as they say, you don't know what you don't know... Not to mention, I've got a ton of learning to do just to figure out how to set up this GRT! I'm mostly just flying the plane at this point, but I did enough digging around the AP to set it to fly a 500fpm descent. Kind of cool to see it nail the VS and keep it there, and to be able to steer using the heading bug! What someone needs to do is to put together some instructional video's on the GRT Sport and upload them to youtube! It's one thing to read the manual, but another entirely to really understand what's going on...