Lõpuks müügis.
Hetkel ei suuda otsustada kas võtta PW-65 või võimsam 75.
Mootor läheks Kyosho PITTS SPECIALILE
http://www.modellhobby-shop.de/Engines- ... 394&c=2394
Muidugi motocalciga asjad sellised ja kõik see mulle ei meeldi eriti.
MotOpinion - Pitts Special Cyclon
32m above Sea Level, 101,3kPa, 14,8°C
Motor: Cyclon PW-65; 950rpm/V; 1,2A no-load; 0,036 Ohms.
Battery: Kokam 3200SHD (20C); 5 cells; 3200mAh @ 3,7V; 0,008 Ohms/cell.
Speed Control: Castle Creations Phoenix 80; 0,001 Ohms; High rate.
Drive System: Aero Naut 9x5; 9x5 (Pconst=1,31; Tconst=0,95) direct drive.
Airframe: Pitts Special; 43dm²; 2306g; 53,6g/dm²; Cd=0,049; Cl=0,16; Clopt=0,38; Clmax=0,89.
Stats: 259 W/kg in; 227 W/kg out; 10,2m/s stall; 15,6m/s opt @ 71% (19:59, 33°C); 23,9m/s level; 5,74m/s @ 21,6°; -2,88m/s @ -10,6°.
Warning:
MotoCalc was unable to determine a throttle setting for hands-off cruise airspeed, so the best lift-to-drag ratio airspeed and throttle setting will be used instead.
Inability to determine a throttle setting for an airspeed usually means the model is not capable of reaching the required speed with the given power system, or the airfoil information has not been specified correctly.
Possible Power System Problems:
The estimated steady-state still-air battery temperature at the best lift-to-drag ratio airspeed and throttle setting (approximately 51°C) is higher than the suggested maximum temperature for this cell type (50°C). This could result in battery pack damage unless adequate cooling airflow is provided and/or run times are kept short. A lower current would also decrease the battery temperature.
Current can be decreased by using fewer cells, a smaller diameter or lower pitched propeller, a higher gear ratio, or some combination of these methods.
Power System Notes:
The full-throttle motor current at the best lift-to-drag ratio airspeed (32A) falls approximately between the motor's maximum efficiency current (23,9A) and its current at theoretical maximum output (239,3A), thus making effective use of the motor.
The voltage (17,1V) exceeds 12V. Be sure the speed control is rated for at least the number of cells specified above.
Aerodynamic Notes:
The static pitch speed (31,1m/s) is within the range of approximately 2,5 to 3 times the model's stall speed (10,2m/s), which is considered ideal for good performance.
With a wing loading of 53,6g/dm², a model of this size will have trainer-like flying characteristics. It would make an ideal trainer, for use in calm to light wind conditions.
The static thrust (1806g) to weight (2306g) ratio is 0,78:1, which will result in very short take-off runs, no difficulty taking off from grass surfaces (assuming sufficiently large wheels), and steep climb-outs.
At the best lift-to-drag ratio airspeed, the excess-thrust (919g) to weight (2306g) ratio is 0,4:1, which will give strong climbs and rapid acceleration. This model will most likely readily loop from level flight, and have sufficient in-flight thrust for many aerobatic maneuvers.
General Notes:
This analysis is based on calculations that take motor heating effects into account.
These calculations are based on mathematical models that may not account for all limitations of the components used. Always consult the power system component manufacturers to ensure that no limits (current, rpm, etc.) are being exceeded.
