Sabremech Posted April 9, 2016 Report Share Posted April 9, 2016 It's been a long time coming for me to get some performance numbers for my cowling mod. Today I flew a performance flight in my modified C and took my numbers. Previous data had my airplane at 148 KTAS. Today's numbers put me at 154 KTAS. I'm pleased with the initial numbers and I plan to fly several more flights and take the data again to verify with more than one flight. With this and the decrease of CHT's by an average of 25-30 degrees Fahrenheit, I think I have a pretty good mod. The STC package is going together and I'm hoping to submit it in a couple of months and get the certification process going. David 14 Quote Link to comment Share on other sites More sharing options...
Guitarmaster Posted April 9, 2016 Report Share Posted April 9, 2016 That's awesome!! How is the spinner search/mod going? Sent from my iPad using Tapatalk Quote Link to comment Share on other sites More sharing options...
Sabremech Posted April 9, 2016 Author Report Share Posted April 9, 2016 Hi Matt, it's going slowly. That's the one big hang up from being able to get a handle on an estimate for a kit price. I will come up with a solution! Thank you, David 3 Quote Link to comment Share on other sites More sharing options...
Marauder Posted April 9, 2016 Report Share Posted April 9, 2016 David - thank you! I am, like Matt and many others, following your progress on the mod. In fact, I'm holding off on doing a paint job until I see if your mod will be available for an F. I know you posted some pre-paint photos. If you do paint it, I would love to see what the new cowl will look like. Sent from my iPad using Tapatalk Quote Link to comment Share on other sites More sharing options...
Sabremech Posted April 9, 2016 Author Report Share Posted April 9, 2016 Hi Marauder, I did paint and stripe it as I know it will be a while before I paint the whole airplane. Here's a few photos if you missed it. Thank you, David 6 Quote Link to comment Share on other sites More sharing options...
Marauder Posted April 9, 2016 Report Share Posted April 9, 2016 Thanks David. Do you have a close up of how it attaches? Looks like you are re-using the lower side covers. Does it use the CamLoc attachments in the top in front of the wind screen? Sent from my iPad using Tapatalk Quote Link to comment Share on other sites More sharing options...
gsxrpilot Posted April 10, 2016 Report Share Posted April 10, 2016 How do we get in line for one of these? Can I send you a deposit? Quote Link to comment Share on other sites More sharing options...
Sabremech Posted April 10, 2016 Author Report Share Posted April 10, 2016 Hi Marauder, I use all the original fasteners, although some are changed to a little longer lengths. I added 10 screws across the front to connect the upper and lower cowls. I retain much of the original cowling and structure. Hi gsxrpilot, I'm not going to take deposits as the certification timeframe is a huge unknown. This can cause problems for people who have money out and nothing to show for it. I'll post updates as the STC progresses so anyone interested can keep track of progress. Thank you, David 3 Quote Link to comment Share on other sites More sharing options...
flyntgr1 Posted April 10, 2016 Report Share Posted April 10, 2016 2 hours ago, Sabremech said: It's been a long time coming for me to get some performance numbers for my cowling mod. Today I flew a performance flight in my modified C and took my numbers. Previous data had my airplane at 148 KTAS. Today's numbers put me at 154 KTAS. I'm pleased with the initial numbers and I plan to fly several more flights and take the data again to verify with more than one flight. With this and the decrease of CHT's by an average of 25-30 degrees Fahrenheit, I think I have a pretty good mod. The STC package is going together and I'm hoping to submit it in a couple of months and get the certification process going. David If I remember correctly, you had the ARI cowl before you started the project. Is your preliminary 6 knot increase the Delta from the ARI to your new cowl? Quote Link to comment Share on other sites More sharing options...
Sabremech Posted April 10, 2016 Author Report Share Posted April 10, 2016 Hi Flyntgr1, Yes, I had the ARI enclosure to start with, so you are correct. Bob Kromer told me I'd see a good number. I'm going to do several more of the same test flights in the next few weeks to verify today's result. Thank you, David 3 Quote Link to comment Share on other sites More sharing options...
Supercop0184 Posted April 10, 2016 Report Share Posted April 10, 2016 Sabre - 1964 M20C model here - DEF want! Sent from my iPhone using Tapatalk 2 Quote Link to comment Share on other sites More sharing options...
Raptor05121 Posted April 10, 2016 Report Share Posted April 10, 2016 David, I might have missed it somewhere in this massive thread, but where did the air filter get relocated to? Also, I'm wondering what kind of bone you can throw us as far as pricing? Over $1,000, under $3,000, etc? Quote Link to comment Share on other sites More sharing options...
Sabremech Posted April 10, 2016 Author Report Share Posted April 10, 2016 Hi Raptor05121, The air filter is relocated to the left cooling air inlet. That's the reason for needing the 201 style spinner and backplate. That gives the room needed to locate the air filter in the front baffling. I'm hesitant to give a price estimate yet as there's still a few unknown costs for parts. When I have those costs known, then I can give an estimate. Thank you, David Quote Link to comment Share on other sites More sharing options...
mike20papa Posted April 10, 2016 Report Share Posted April 10, 2016 The performance speed you give, would you share altitude, engine settings and fuel burn or EGT's Quote Link to comment Share on other sites More sharing options...
mike_elliott Posted April 10, 2016 Report Share Posted April 10, 2016 David, thanks again for your efforts and for allowing the Mooney Summit to be your unveiling! This year, please fly down to the Summit and show this beauty off again! 1 Quote Link to comment Share on other sites More sharing options...
Sabremech Posted April 10, 2016 Author Report Share Posted April 10, 2016 Hi mike20papa, The performance flight was done at 6500 feet, 2500 rpm (using a prop tach), and full throttle. I don't have a fuel flow to measure the fuel burn and I didn't pay attention to EGT's on this flight. Hi Mike E, we have vacation on the calendar for the Summit and hope for good weather to fly! Thanks, David 3 Quote Link to comment Share on other sites More sharing options...
bonal Posted April 10, 2016 Report Share Posted April 10, 2016 Good one Daver 1 Quote Link to comment Share on other sites More sharing options...
Bob_Belville Posted April 10, 2016 Report Share Posted April 10, 2016 Just now, daver328 said: Waiting for E, F and J owners to call you a liar ... Err ... Accuse you of Exaggerating your airspeed. It happens every time a C owner claims anything faster than 135. You had to have had a tailwind in all three/four directions! Oh unfair. We're as anxious as you C owners are to get another 6 kts or more free speed. For my decrepit old E that would be about 164 kts. 2 Quote Link to comment Share on other sites More sharing options...
Sabremech Posted April 10, 2016 Author Report Share Posted April 10, 2016 2 hours ago, daver328 said: Waiting for E, F and J owners to call you a liar ... Err ... Accuse you of Exaggerating your airspeed. It happens every time a C owner claims anything faster than 135. You had to have had a tailwind in all three/four directions! So why can't my C be as fast as an E, F or J ? Quote Link to comment Share on other sites More sharing options...
Ned Gravel Posted April 10, 2016 Report Share Posted April 10, 2016 Because its missing 20 ponies? 1 Quote Link to comment Share on other sites More sharing options...
Marauder Posted April 10, 2016 Report Share Posted April 10, 2016 19 hours ago, Sabremech said: It's been a long time coming for me to get some performance numbers for my cowling mod. Today I flew a performance flight in my modified C and took my numbers. Previous data had my airplane at 148 KTAS. Today's numbers put me at 154 KTAS. I'm pleased with the initial numbers and I plan to fly several more flights and take the data again to verify with more than one flight. With this and the decrease of CHT's by an average of 25-30 degrees Fahrenheit, I think I have a pretty good mod. The STC package is going together and I'm hoping to submit it in a couple of months and get the certification process going. David Waiting for E, F and J owners to call you a liar ... Err ... Accuse you of Exaggerating your airspeed. It happens every time a C owner claims anything faster than 135. You had to have had a tailwind in all three/four directions! Liar!!! Pants on fire!!! Feel better Dave? 1 Quote Link to comment Share on other sites More sharing options...
Sabremech Posted April 10, 2016 Author Report Share Posted April 10, 2016 1 hour ago, Ned Gravel said: Because its missing 20 ponies? I have a lot of that slippery go fast stuff on mine to make up for the missing ponies. Quote Link to comment Share on other sites More sharing options...
gsxrpilot Posted April 10, 2016 Report Share Posted April 10, 2016 I flew the Bob Axiom Memorial Air Race yesterday in Taylor, TX. According to race officials, I averaged 154 kts. over the course. Some C's are slipperier than others. 2 Quote Link to comment Share on other sites More sharing options...
Raptor05121 Posted April 10, 2016 Report Share Posted April 10, 2016 1 hour ago, Marauder said: Liar!!! Pants on fire!!! Feel better Dave? What kind of ASI is in the top left photo? Quote Link to comment Share on other sites More sharing options...
Marauder Posted April 10, 2016 Report Share Posted April 10, 2016 1 hour ago, Marauder said: Liar!!! Pants on fire!!! Feel better Dave? What kind of ASI is in the top left photo? It is the original Mooney ASI. I sent it out to have it refaced a few years ago. Since my POH is in knots and MPH, I was able to have it refaced with the knots placed on the outside ring. 1 Quote Link to comment Share on other sites More sharing options...
Recommended Posts
Join the conversation
You can post now and register later. If you have an account, sign in now to post with your account.