Jsavage3 Posted January 28, 2015 Report Share Posted January 28, 2015 Fellow Mooniacs, Regarding the long list of different Mooney models available, something that has always seemed to elude us have been what could one REALLY expect Mooney model x, y or z to really do. So, for those of us who are current or future Mooney owners, I'd like to propose that we establish this thread for that purpose. I would like to see actual Mooney owners post what they routinely see for performance from the various Mooney models out there. Let's say power settings, LOP/Peak/ROP, GPH, TAS at what altitude, etc... I'll start. My wife & I own a 1986 J model with GAMI's, powerflow exhaust and K&N air filter with an engine that is under 200 hours since O/H... she runs strong and I routinely see the following: At 25 ROP off of #2 (first to peak) using a UBG-16 and I like to run 65% power at WOT (using the "47" number) around 9,000 feet...usually 22" & 2500 RPM or 21" & 2600 RPM. My CHTs are usually 340-360, cowl flaps closed, ram air open, 9.3 to 9.6 GPH and 161 KTAS. My GAMI spread is 0.2. I usually cruise between 8 and 12 thousand feet for nearly 20 sm per gallon. 8 and 9 thousand seems to be my J's sweet spot (also mine without O2) and I typically see WOT at 8 and 9 thousand feet giving me 22 or 21" MP, respectively. Of particular interest to me will be the performance specs for turbo J models, Eagles, 231s, 252/Encores, Ovations and TLS Bravos... Here's our bird... Quote Link to comment Share on other sites More sharing options...
Flymu2 Posted January 28, 2015 Report Share Posted January 28, 2015 Unmodified M20S FT, 2400 RPM. 170 KTAS, FF about 12.5 at 4000, 11.3 at 10000, 50 LOP low, 20 LOP high BTW, quoting a percent power is meaningless. Quote Link to comment Share on other sites More sharing options...
Mooneymite Posted January 28, 2015 Report Share Posted January 28, 2015 Unmodified M-20C 2300X23" 8.2 GPH .21 Mach. 8 Quote Link to comment Share on other sites More sharing options...
Jsavage3 Posted January 28, 2015 Author Report Share Posted January 28, 2015 Nice numbers FlyMU2. Near as I can tell, you're getting 17.3 sm per gallon at 10K w/ 20 LOP. BTW, I've heard the talk, but % power does mean something to me. To each their own, right? When you say unmodified -- what do you mean? Quote Link to comment Share on other sites More sharing options...
kerry Posted January 28, 2015 Report Share Posted January 28, 2015 M20A does mach .224 at 2400, ALT 10.5 burning 9 GPH 1 Quote Link to comment Share on other sites More sharing options...
Joe Zuffoletto Posted January 28, 2015 Report Share Posted January 28, 2015 M20TN with 310hp conversion. Conversion affects takeoff distance and climb rate, but not cruise speeds. At FL180, 70LOP I see 205KTAS at 14.5gph. At FL180, 50ROP I see 215KTAS at 17.3gph. 1 Quote Link to comment Share on other sites More sharing options...
helitim Posted January 28, 2015 Report Share Posted January 28, 2015 What EGT's are you seeing at cruise? Quote Link to comment Share on other sites More sharing options...
rbridges Posted January 28, 2015 Report Share Posted January 28, 2015 C model. I see roughly 152 knots at 9-10.5 gph depending on altitude. 201 cowling, windshield and powerflo exhaust. I usually cruise at 2400 rpm, full MP. I keep CHT <380, closer to 360. I don't watch EGT too much. 1 Quote Link to comment Share on other sites More sharing options...
dfgreene61 Posted January 28, 2015 Report Share Posted January 28, 2015 '82 J Model with GAMIs. 152 Knots @ 10,500 Feet, 2,500 RPM, WOT, LOP, 8.5 GPH NOTE: As soon as I get my plane back from the paint shop I expect it to be 10 knots faster Quote Link to comment Share on other sites More sharing options...
Marauder Posted January 28, 2015 Report Share Posted January 28, 2015 '82 J Model with GAMIs. 152 Knots @ 10,500 Feet, 2,500 RPM, WOT, LOP, 8.5 GPH NOTE: As soon as I get my plane back from the paint shop I expect it to be 10 knots faster It should be faster. Not from all the money you put in, rather from how much lighter your wallet is 1 Quote Link to comment Share on other sites More sharing options...
N252WD Posted January 28, 2015 Report Share Posted January 28, 2015 '85 M20K 252TSE w/ Reman Yesterday, from KPVJ (Pauls Valley) to KCXO (Conroe), 11,500', IA 165kts, GS 195kts, sq 25, 11.2 gph. Quote Link to comment Share on other sites More sharing options...
Cruiser Posted January 28, 2015 Report Share Posted January 28, 2015 1999 Ovation w/TKS and 310hp 9000' indicated 10,868 DA 20.4x2330 58% hp 12.0 gph 29.97" 12°C -15 LOP 169 KTAS Quote Link to comment Share on other sites More sharing options...
dfgreene61 Posted January 29, 2015 Report Share Posted January 29, 2015 It should be faster. Not from all the money you put in, rather from how much lighter your wallet is Owning an airplane is a great way to turn a big pile of money into a small pile of money...but what is money for? 1 Quote Link to comment Share on other sites More sharing options...
Flymu2 Posted January 29, 2015 Report Share Posted January 29, 2015 Nice numbers FlyMU2. Near as I can tell, you're getting 17.3 sm per gallon at 10K w/ 20 LOP. BTW, I've heard the talk, but % power does mean something to me. To each their own, right? When you say unmodified -- what do you mean? Not converted to 280 or 310 hp. Also has 2 blade prop. The only "percent power" that makes any sense to me is when LOP, using the 14.9 x gph formula to get horsepower, then dividing by max power for percent power. There is a formula for ROP ops that somehow estimates mass air flow, but I don't have it at my fingertips. In my POH there are charts for max power and max economy that give the same percent power at the same MP and RPM whether ROP or LOP. That to me is meaningless. Quote Link to comment Share on other sites More sharing options...
cliffy Posted January 29, 2015 Report Share Posted January 29, 2015 64' M20 D/C WOT, 2500 RPM, 50 ROP, 9500 MSL 137-138 KTS TAS 8.5 GPH, @18MPG. 3 blade prop. Checked it many times both with wiz wheel and GPS On a good day maybe 140 KTS on a bad day 135 KTS. No mods. Quote Link to comment Share on other sites More sharing options...
Jsavage3 Posted January 30, 2015 Author Report Share Posted January 30, 2015 '85 M20K 252TSE w/ Reman Yesterday, from KPVJ (Pauls Valley) to KCXO (Conroe), 11,500', IA 165kts, GS 195kts, sq 25, 11.2 gph. N252W, regarding your numbers, what true airspeed are you seeing? If it's about where I think it should be, 11.2 GPH is quite impressive. Quote Link to comment Share on other sites More sharing options...
N252WD Posted January 30, 2015 Report Share Posted January 30, 2015 From my #'s, TAS was around 190-195. Quote Link to comment Share on other sites More sharing options...
Jsavage3 Posted January 30, 2015 Author Report Share Posted January 30, 2015 From my #'s, TAS was around 190-195. Assuming you mean KTAS, then I'm thinking your 252 is getting about 19.5 to 20 sm per gallon. Very impressive; the epitome of efficiency for a 4-seat airplane! Quote Link to comment Share on other sites More sharing options...
schule Posted January 31, 2015 Report Share Posted January 31, 2015 M20K 115KTAS, 2100rpm, 25", 6.5gph 160KTAS, 2500rpm, 31", 9.5gph 165KTAS, 2500rpm, 33", 10.2gph 170KTAS, 2550rpm, 33", 11gph 180KTAS, 2700rpm, 40", 24gph M20F 145KTAS, 2500rpm, Max MP, 8.2gph 155KTAS, 2500rpm, Max MP, 11gph The last couple knots are expensive. Might look up the Vz threads for a good paper on efficiency. Quote Link to comment Share on other sites More sharing options...
carusoam Posted January 31, 2015 Report Share Posted January 31, 2015 Nothing beats a turbo Mooney flown LOP at altitude... Quote Link to comment Share on other sites More sharing options...
rbridges Posted January 31, 2015 Report Share Posted January 31, 2015 What is LOP, I keep seeing everywhere? lean of peak. fuel injected guys can do it. tons of threads about how to do it, but it lets you run a little slower burning substantially less fuel. Quote Link to comment Share on other sites More sharing options...
aaronk25 Posted February 1, 2015 Report Share Posted February 1, 2015 1977 J powerflow exhaust, boarding step removed: 8000ft 2700rpm, full throttle, 50rop 12.3gph 168kts true Same as above but at peak egt, 10.9gph 164kts Same but 20 lop 159kts 10.1gph Take 3kts off for 2500rpm and about 1gph less give or take. Sweet spot is 22"mp 2400rpm 10lop at 8.2gph turning 152kts. Between 7-11k. Mp at 11k Is less so operate at peak egt but same fuel flow of 8.2gph same 152ish kts 1 Quote Link to comment Share on other sites More sharing options...
aaronk25 Posted February 16, 2015 Report Share Posted February 16, 2015 At -6c 2400f WOT 2740rpm 80rop the 170kts gauge peg was completely covered. These powerflow exhaust systems rock! This is a bone stock 77j 2 Quote Link to comment Share on other sites More sharing options...
Bob - S50 Posted February 16, 2015 Report Share Posted February 16, 2015 Stock '78 J except a Donaldson air filter (which I recommend): 8000 - 10000' WOT 2400 RPM 10-30 LOP 150 KTAS 8.7 GPH 17.24 nm/gal = 19.8 sm/gal... better than my truck Bob Quote Link to comment Share on other sites More sharing options...
AndyFromCB Posted February 16, 2015 Report Share Posted February 16, 2015 My TKSed Bravo is a 190knot bird at FL180, consuming about 18gph (30/2400) to accomplish that at 1650TIT, or a 200knot bird eating about 22gph AT 34/2400 but that's 89% power, so I never run it that hard. A lot of times I'll stay down at 12,000, running about 27/2400, around 15.5 gph doing 175knots, or do 185knots on the same fuel flow at FL180. If I'm really shooting for max millage, I can cruise at 24/2400, around 13.5 gph, doing 155knots at 12,000 or 165knots at FL180. A lot of times my cruise setting for when I get good tailwinds. I do not like running the Bravo below 2400rpm due to weird vibration. At 2400 mine is turbine smooth. Quote Link to comment Share on other sites More sharing options...
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