Shaun Walsh

And who do the people from County Kerry tell jokes about?

Think she's OK but the transmitter suffered a brown out.

Looks like this joke is definitely out then? http://www.heidecker.eu/MultiKulti/E_MultiHimmelHoelle.htm

So you're not "having a paddy" over it? 🤣 I seriously wonder how the easily offended manage to get through life looking to take insult at every opportunity.

An Englishman, a person of low IQ, and a parsimonious person go into a bar.................. That's got rid of the stereotypes.

Just remember to drop her off three doors down from where you picked her up.

I believe that diesel can be injected into the exhaust of jet engines to produce smoke (with dye if colour required) but I think that it's being replaced by more environmentally friendly white oil (paraffin oil) injected into the exhaust.

Would full size aviation smoke oil work? https://aviationsmokeoil.com/?gclid=Cj0KCQjwz8emBhDrARIsANNJjS7UlqvBe0c3EWlZCZGx34KdExTwWeB7-WMCbhFyhdWKqqiY9ptxVh4aAhuIEALw_wcB

I've used APC-E for the 2 blade props and Master Airscrew for the 3 blade. Other options are available.

I also measure thrust using a set of luggage scales attached to the tail of the model. something like this

I usually find that the eCalc figures are pretty close to those measured with my wattmeter. Remember that static current figures will be higher than those measured when the model is flying.

Correction Figures for 11x7 2 blade should be Battery Load: 7.26 C Voltage: 21.62 V Rated Voltage: 22.20 V Energy: 88.8 Wh Total Capacity: 4000 mAh Used Capacity: 3400 mAh min. Flight Time: 7.0 min Mixed Flight Time: 11.2 min Weight: 684 g 24.1 oz Motor @ Optimum Efficiency Current: 70.06 A Voltage: 20.50 V Revolutions*: 9042 rpm electric Power: 1436.0 W mech. Power: 1192.1 W Efficiency: 83.0 % Motor @ Maximum Current: 29.05 A Voltage: 21.49 V Revolutions*: 10052 rpm electric Power: 624.5 W mech. Power: 462.2 W Efficiency: 74.0 % est. Temperature: 75 °C 167 °F Wattmeter readings Current: 29.05 A Voltage: 21.62 V Power: 628.1 W Propeller Static Thrust: 2673 g 94.3 oz Revolutions*: 10052 rpm Stall Thrust: - g - oz avail.Thrust @ 0 km/h: 2673 g avail.Thrust @ 0 mph: 94.3 oz Pitch Speed: 107 km/h 66 mph Tip Speed: 529 km/h 329 mph specific Thrust: 4.28 g/W 0.15 oz/W Total Drive Drive Weight: 1132 g 39.9 oz Power-Weight: 239 W/kg 109 W/lb Thrust-Weight: 0.99 : 1 Current @ max: 29.05 A P(in) @ max: 645.0 W P(out) @ max: 462.2 W Efficiency @ max: 71.7 % Torque: 0.44 Nm 0.32 lbf.ft Climb Capacity: 3375 m 11073 ft Airplane All-up Weight: 2700 g 95.2 oz Wing Load: 54.0 g/dm² 17.7 oz/ft² Cubic Wing Load: 7.6 est. Stall Speed: 34 km/h 21 mph est. Speed (level): 86 km/h 53 mph est. Speed (vertical): - km/h - mph est. rate of climb: 8 m/s ( ~45...50° ) 1577 ft/min

You left out " But schtupid"

Figures for 12x8 Battery Load: 10.27 C Voltage: 21.39 V Rated Voltage: 22.20 V Energy: 88.8 Wh Total Capacity: 4000 mAh Used Capacity: 3400 mAh min. Flight Time: 5.0 min Mixed Flight Time: 9.8 min Weight: 684 g 24.1 oz Motor @ Optimum Efficiency Current: 70.06 A Voltage: 20.50 V Revolutions*: 9042 rpm electric Power: 1436.0 W mech. Power: 1192.1 W Efficiency: 83.0 % Motor @ Maximum Current: 41.09 A Voltage: 21.20 V Revolutions*: 9755 rpm electric Power: 871.1 W mech. Power: 694.6 W Efficiency: 79.7 % est. Temperature: 79 °C 174 °F Wattmeter readings Current: 41.09 A Voltage: 21.39 V Power: 878.9 W Propeller Static Thrust: 3735 g 131.7 oz Revolutions*: 9755 rpm Stall Thrust: - g - oz avail.Thrust @ 0 km/h: 3735 g avail.Thrust @ 0 mph: 131.7 oz Pitch Speed: 119 km/h 74 mph Tip Speed: 560 km/h 348 mph specific Thrust: 3.74 g/W 0.13 oz/W Total Drive Drive Weight: 1132 g 39.9 oz Power-Weight: 338 W/kg 153 W/lb Thrust-Weight: 1.38 : 1 Current @ max: 41.09 A P(in) @ max: 912.2 W P(out) @ max: 694.6 W Efficiency @ max: 76.1 % Torque: 0.68 Nm 0.5 lbf.ft Climb Capacity: 3174 m 10413 ft Airplane All-up Weight: 2700 g 95.2 oz Wing Load: 54.0 g/dm² 17.7 oz/ft² Cubic Wing Load: 7.6 est. Stall Speed: 34 km/h 21 mph est. Speed (level): 99 km/h 61 mph est. Speed (vertical): 36 km/h 22 mph est. rate of climb: 10.7 m/s ( ~85...90° ) 2097 ft/min Figures for 12x6 Battery Load: 8.34 C Voltage: 21.54 V Rated Voltage: 22.20 V Energy: 88.8 Wh Total Capacity: 4000 mAh Used Capacity: 3400 mAh min. Flight Time: 6.1 min Mixed Flight Time: 10.3 min Weight: 684 g 24.1 oz Motor @ Optimum Efficiency Current: 70.06 A Voltage: 20.50 V Revolutions*: 9042 rpm electric Power: 1436.0 W mech. Power: 1192.1 W Efficiency: 83.0 % Motor @ Maximum Current: 33.38 A Voltage: 21.39 V Revolutions*: 9945 rpm electric Power: 713.9 W mech. Power: 547.4 W Efficiency: 76.7 % est. Temperature: 76 °C 169 °F Wattmeter readings Current: 33.38 A Voltage: 21.54 V Power: 719 W Propeller Static Thrust: 2911 g 102.7 oz Revolutions*: 9945 rpm Stall Thrust: - g - oz avail.Thrust @ 0 km/h: 2911 g avail.Thrust @ 0 mph: 102.7 oz Pitch Speed: 91 km/h 57 mph Tip Speed: 571 km/h 355 mph specific Thrust: 4.08 g/W 0.14 oz/W Total Drive Drive Weight: 1132 g 39.9 oz Power-Weight: 274 W/kg 124 W/lb Thrust-Weight: 1.08 : 1 Current @ max: 33.38 A P(in) @ max: 740.9 W P(out) @ max: 547.4 W Efficiency @ max: 73.9 % Torque: 0.53 Nm 0.39 lbf.ft Climb Capacity: 3051 m 10010 ft Airplane All-up Weight: 2700 g 95.2 oz Wing Load: 54.0 g/dm² 17.7 oz/ft² Cubic Wing Load: 7.6 est. Stall Speed: 34 km/h 21 mph est. Speed (level): 84 km/h 52 mph est. Speed (vertical): 9 km/h 6 mph est. rate of climb: 8.3 m/s ( ~50...55° ) 1638 ft/min Figures for 11x6 Battery Load: 6.52 C Voltage: 21.68 V Rated Voltage: 22.20 V Energy: 88.8 Wh Total Capacity: 4000 mAh Used Capacity: 3400 mAh min. Flight Time: 7.8 min Mixed Flight Time: 11.4 min Weight: 684 g 24.1 oz Motor @ Optimum Efficiency Current: 70.06 A Voltage: 20.50 V Revolutions*: 9042 rpm electric Power: 1436.0 W mech. Power: 1192.1 W Efficiency: 83.0 % Motor @ Maximum Current: 26.07 A Voltage: 21.57 V Revolutions*: 10125 rpm electric Power: 562.1 W mech. Power: 402.2 W Efficiency: 71.5 % est. Temperature: 74 °C 165 °F Wattmeter readings Current: 26.07 A Voltage: 21.68 V Power: 565.2 W Propeller Static Thrust: 2324 g 82 oz Revolutions*: 10125 rpm Stall Thrust: - g - oz avail.Thrust @ 0 km/h: 2324 g avail.Thrust @ 0 mph: 82 oz Pitch Speed: 93 km/h 58 mph Tip Speed: 533 km/h 331 mph specific Thrust: 4.14 g/W 0.15 oz/W Total Drive Drive Weight: 1132 g 39.9 oz Power-Weight: 214 W/kg 97 W/lb Thrust-Weight: 0.86 : 1 Current @ max: 26.07 A P(in) @ max: 578.6 W P(out) @ max: 402.2 W Efficiency @ max: 69.5 % Torque: 0.38 Nm 0.28 lbf.ft Climb Capacity: 3222 m 10571 ft Airplane All-up Weight: 2700 g 95.2 oz Wing Load: 54.0 g/dm² 17.7 oz/ft² Cubic Wing Load: 7.6 est. Stall Speed: 34 km/h 21 mph est. Speed (level): 79 km/h 49 mph est. Speed (vertical): - km/h - mph est. rate of climb: 6.9 m/s ( ~40...45° ) 1351 ft/min Figures for 11x7 Battery Load: 6.52 C Voltage: 21.68 V Rated Voltage: 22.20 V Energy: 88.8 Wh Total Capacity: 4000 mAh Used Capacity: 3400 mAh min. Flight Time: 7.8 min Mixed Flight Time: 11.4 min Weight: 684 g 24.1 oz Motor @ Optimum Efficiency Current: 70.06 A Voltage: 20.50 V Revolutions*: 9042 rpm electric Power: 1436.0 W mech. Power: 1192.1 W Efficiency: 83.0 % Motor @ Maximum Current: 26.07 A Voltage: 21.57 V Revolutions*: 10125 rpm electric Power: 562.1 W mech. Power: 402.2 W Efficiency: 71.5 % est. Temperature: 74 °C 165 °F Wattmeter readings Current: 26.07 A Voltage: 21.68 V Power: 565.2 W Propeller Static Thrust: 2324 g 82 oz Revolutions*: 10125 rpm Stall Thrust: - g - oz avail.Thrust @ 0 km/h: 2324 g avail.Thrust @ 0 mph: 82 oz Pitch Speed: 93 km/h 58 mph Tip Speed: 533 km/h 331 mph specific Thrust: 4.14 g/W 0.15 oz/W Total Drive Drive Weight: 1132 g 39.9 oz Power-Weight: 214 W/kg 97 W/lb Thrust-Weight: 0.86 : 1 Current @ max: 26.07 A P(in) @ max: 578.6 W P(out) @ max: 402.2 W Efficiency @ max: 69.5 % Torque: 0.38 Nm 0.28 lbf.ft Climb Capacity: 3222 m 10571 ft Airplane All-up Weight: 2700 g 95.2 oz Wing Load: 54.0 g/dm² 17.7 oz/ft² Cubic Wing Load: 7.6 est. Stall Speed: 34 km/h 21 mph est. Speed (level): 79 km/h 49 mph est. Speed (vertical): - km/h - mph est. rate of climb: 6.9 m/s ( ~40...45° ) 1351 ft/min Figures for 11x7 3 blade Battery Load: 9.17 C Voltage: 21.47 V Rated Voltage: 22.20 V Energy: 88.8 Wh Total Capacity: 4000 mAh Used Capacity: 3400 mAh min. Flight Time: 5.6 min Mixed Flight Time: 10.1 min Weight: 684 g 24.1 oz Motor @ Optimum Efficiency Current: 70.06 A Voltage: 20.50 V Revolutions*: 9042 rpm electric Power: 1436.0 W mech. Power: 1192.1 W Efficiency: 83.0 % Motor @ Maximum Current: 36.67 A Voltage: 21.31 V Revolutions*: 9864 rpm electric Power: 781.4 W mech. Power: 611.0 W Efficiency: 78.2 % est. Temperature: 78 °C 172 °F Wattmeter readings Current: 36.67 A Voltage: 21.47 V Power: 787.3 W Propeller Static Thrust: 3283 g 115.8 oz Revolutions*: 9864 rpm Stall Thrust: - g - oz avail.Thrust @ 0 km/h: 3283 g avail.Thrust @ 0 mph: 115.8 oz Pitch Speed: 105 km/h 65 mph Tip Speed: 520 km/h 323 mph specific Thrust: 4.20 g/W 0.15 oz/W Total Drive Drive Weight: 1132 g 39.9 oz Power-Weight: 302 W/kg 137 W/lb Thrust-Weight: 1.22 : 1 Current @ max: 36.67 A P(in) @ max: 814.1 W P(out) @ max: 611.0 W Efficiency @ max: 75.1 % Torque: 0.59 Nm 0.44 lbf.ft Climb Capacity: 3170 m 10400 ft Airplane All-up Weight: 2700 g 95.2 oz Wing Load: 54.0 g/dm² 17.7 oz/ft² Cubic Wing Load: 7.6 est. Stall Speed: 34 km/h 21 mph est. Speed (level): 91 km/h 57 mph est. Speed (vertical): 22 km/h 14 mph est. rate of climb: 9.5 m/s ( ~60...65° ) 1870 ft/min

I can run some numbers through eCalc for a 12x6 when I get home this evening.

And the dog.

Exactly, and if a 12" prop is too large a 3 blade 11" prop can be substituted. Don't panic Captain Mainwaring!

That would be a Kiel Kraft Phantom Mite powered by a DC Merlin diesel engine in 1969.

Will be intrigued to see a video of it flying 🙂

Will probably fly better inverted. The front of the fuselage will produce a lot of drag, cut the motor and it will probably stop dead. The tailplane on the model doesn't correspond to the drawing. That's a lot of fuselage area ahead oh the CofG and not a great deal of tail fin/rudder behind it.

These are the 12x8 figures. Really depends on whether there's enough ground clearance to ensure that the prop doesn't hit the ground. Battery Load: 8.85 C Voltage: 21.51 V Rated Voltage: 22.20 V Energy: 99.9 Wh Total Capacity: 4500 mAh Used Capacity: 3825 mAh min. Flight Time: 5.8 min Mixed Flight Time: 11.1 min Weight: 768 g 27.1 oz Motor @ Optimum Efficiency Current: 70.54 A Voltage: 20.66 V Revolutions*: 9112 rpm electric Power: 1457.0 W mech. Power: 1209.7 W Efficiency: 83.0 % Motor @ Maximum Current: 39.83 A Voltage: 21.33 V Revolutions*: 9833 rpm electric Power: 849.5 W mech. Power: 673.6 W Efficiency: 79.3 % est. Temperature: 79 °C 174 °F Wattmeter readings Current: 39.83 A Voltage: 21.51 V Power: 856.7 W Propeller Static Thrust: 3596 g 126.8 oz Revolutions*: 9833 rpm Stall Thrust: - g - oz avail.Thrust @ 0 km/h: 3596 g avail.Thrust @ 0 mph: 126.8 oz Pitch Speed: 120 km/h 75 mph Tip Speed: 565 km/h 351 mph specific Thrust: 3.69 g/W 0.13 oz/W Total Drive Drive Weight: 1224 g 43.2 oz Power-Weight: 327 W/kg 148 W/lb Thrust-Weight: 1.33 : 1 Current @ max: 39.83 A P(in) @ max: 884.2 W P(out) @ max: 673.6 W Efficiency @ max: 76.2 % Torque: 0.65 Nm 0.48 lbf.ft Climb Capacity: 3684 m 12087 ft Airplane All-up Weight: 2700 g 95.2 oz Wing Load: 54.0 g/dm² 17.7 oz/ft² Cubic Wing Load: 7.6 est. Stall Speed: 35 km/h 22 mph est. Speed (level): 99 km/h 61 mph est. Speed (vertical): 33 km/h 20 mph est. rate of climb: 10.7 m/s ( ~75...80° ) 2097 ft/min

If you see my post on page 4 I've already given you the figures for a 12x8 prop. If a 12" prop gives too little ground clearance you could drop to an 11x7" three blade Master Airscrew prop. Figures for this are below. Don't be limited by the props you already have, sometimes you have to choose between buying the right prop for the motor or the right motor for the prop. Battery Load: 8.82 C Voltage: 21.50 V Rated Voltage: 22.20 V Energy: 88.8 Wh Total Capacity: 4000 mAh Used Capacity: 3400 mAh min. Flight Time: 5.8 min Mixed Flight Time: 10.2 min Weight: 684 g 24.1 oz Motor @ Optimum Efficiency Current: 70.06 A Voltage: 20.50 V Revolutions*: 9042 rpm electric Power: 1436.0 W mech. Power: 1192.1 W Efficiency: 83.0 % Motor @ Maximum Current: 35.28 A Voltage: 21.34 V Revolutions*: 9899 rpm electric Power: 752.9 W mech. Power: 584.2 W Efficiency: 77.6 % est. Temperature: 77 °C 171 °F Wattmeter readings Current: 35.28 A Voltage: 21.5 V Power: 758.5 W Propeller Static Thrust: 3133 g 110.5 oz Revolutions*: 9899 rpm Stall Thrust: - g - oz avail.Thrust @ 0 km/h: 3133 g avail.Thrust @ 0 mph: 110.5 oz Pitch Speed: 106 km/h 66 mph Tip Speed: 521 km/h 324 mph specific Thrust: 4.16 g/W 0.15 oz/W Total Drive Drive Weight: 1132 g 39.9 oz Power-Weight: 290 W/kg 132 W/lb Thrust-Weight: 1.16 : 1 Current @ max: 35.28 A P(in) @ max: 783.1 W P(out) @ max: 584.2 W Efficiency @ max: 74.6 % Torque: 0.56 Nm 0.41 lbf.ft Climb Capacity: 3237 m 10620 ft Airplane All-up Weight: 2700 g 95.2 oz Wing Load: 54.0 g/dm² 17.7 oz/ft² Cubic Wing Load: 7.6 est. Stall Speed: 35 km/h 22 mph est. Speed (level): 92 km/h 57 mph est. Speed (vertical): 18 km/h 11 mph est. rate of climb: 9.3 m/s ( ~55...60° ) 1836 ft/min

And there's me thinking a Bottom Quark was what you did after three pints of Guinness and a chicken vindaloo!