Niisiis võtsin ette lõpuks ka motocalci (ostsin ära),kuna teisiti tundus asi ikka liiga räige kobamisena pimeduses.
Aga probleeme kui palju!
Mootorite ja akude andmed väga erinevad,st.andmed calcis ja tootjate,edasimüüjate lehtede täiesti erinevad.
Millest lähtuda,osta mootor,aku,propeller,mudel ja vaata sellega kaasaolevat juhendit,mõõda ja kaalu ise,kust leida adekvaatseid andmeid?
Kavandatava mudeli puhul on kole raske kõike täpselt ette teada saada.
Kogemus endal MEGA brushlessiga,mille andmed tootjal,edasimüüjatel ja calcis erinevad(pöörded per volt eelkõige st. 2150-1350-1850)
Jälle akudest,mootoritest ja motocalcist!
Jälle akudest,mootoritest ja motocalcist!
Harjumaa-Tallinn-Harjumaa
Spectrum DX9 2,4G
FOX EPO Glider 2,3M
DISCUS CS 2,6M
PROXIMA II 2,8M
CONDOR 2,5M
VOLARE 230
ELIPSOID EVO 280
Hot Pepper 3D
Durafly™ HyperBipe 900mm EPO
Spectrum DX9 2,4G
FOX EPO Glider 2,3M
DISCUS CS 2,6M
PROXIMA II 2,8M
CONDOR 2,5M
VOLARE 230
ELIPSOID EVO 280
Hot Pepper 3D
Durafly™ HyperBipe 900mm EPO
Köige kindlamaks pean oma möödetud andmeid.
Kui midagi uut planeerima hakkan, siis korjan kokku olemasolevad möötmised, mid internetist leida on ja proovin nende baasil leida kesktee.
Osa teiste kasutajate poolt tehtud möötmisi päris reaalsed.
Seepärast uurin, kas nendel, "usaldusvääärsetel", on selle asja kohta juba andmeid pakkuda.
Mart.
Kui midagi uut planeerima hakkan, siis korjan kokku olemasolevad möötmised, mid internetist leida on ja proovin nende baasil leida kesktee.
Osa teiste kasutajate poolt tehtud möötmisi päris reaalsed.
Seepärast uurin, kas nendel, "usaldusvääärsetel", on selle asja kohta juba andmeid pakkuda.
Mart.
Mootori andmete mõõtmisest on lühidalt
http://forum.pistik.com/viewtopic.php?t=1167
lõpupoole ka kirjas.
Ega see keeruline polegi. Üks mõõtmine tühijooksul, teine mingi takistusega (kasvõi suvaline prop).
Ei hakanud uut teemat tegema,aga jändasin eile taas motocalciga.
Üritasin leida ideaalset propellerit max. diameetriga,jõudsin sellise tulemuseni.
MotOpinion - Condor 2,5 13x8 lipo
35m above Sea Level, 101,3kPa, 14,8°C
Motor: Dymond 3660; 1350rpm/V; 0,9A no-load; 0,0478 Ohms.
Battery: Kokam 3200SHD (18C); 3 cells; 3200mAh @ 3,7V; 0,008 Ohms/cell.
Speed Control: Generic Brushless ESC; 0,006 Ohms; High rate.
Drive System: Aero Naut 13x7; 13x7 (Pconst=1,31; Tconst=0,95) direct drive.
Airframe: Condor 2,5; 44,5dm²; 1443g; 32,4g/dm²; Cd=0,044; Cl=0,55; Clopt=0,76; Clmax=1,09.
Stats: 382 W/kg in; 196 W/kg out; 7,2m/s stall; 8,6m/s opt @ 31% (96:33, 17°C); 10,1m/s level @ 36% (72:11, 17°C); 8,1m/s @ 70,7°; -0,62m/s @ -4,1°.
Possible Power System Problems:
The static full-throttle current (59,2A) exceeds the capability of the specified battery (57,6A at 18C), which will most likely damage the battery and may cause a fire.
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:
At full-throttle and the best lift-to-drag ratio airspeed, the motor is operating approximately between its maximum efficiency current (13,3A) and its current at theoretical maximum output (98,1A). However, it is operating at only 53% efficiency, which is significantly less than its theoretical maximum efficiency (87%). Efficiency may improve at reduced throttle settings.
Aerodynamic Notes:
The static pitch speed (19,4m/s) is within the range of approximately 2,5 to 3 times the model's stall speed (7,18m/s), which is considered ideal for good performance.
With a wing loading of 32,4g/dm², a model of this size will have very sedate flying characteristics. It will be suitable for relaxed flying, in calm or very light wind conditions.
The static thrust (1788g) to weight (1443g) ratio is 1,24:1, which will result in extremely short take-off runs, no difficulty taking off from grass surfaces (assuming sufficiently large wheels), and vertical climb-outs. This model will probably be able to perform a hover or torque roll.
At the best lift-to-drag ratio airspeed, the excess-thrust (1284g) to weight (1443g) ratio is 0,89:1, which will give very steep climbs and incredible acceleration. This model can easily do consecutive loops, and has sufficient in-flight thrust for any aerobatic maneuver.
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.
Proovisin,mis ma proovisin ideaalset ei leidnudki,küll jäi lahjaks,küll läks põlema,küll oli väike ja väheefektiivne jne.
Ühesõnaga abiks nagu oleks aga......
Kas teie teadjad olete suutnud saavutada ideaalseid kalkulatsioone?
Üritasin leida ideaalset propellerit max. diameetriga,jõudsin sellise tulemuseni.
MotOpinion - Condor 2,5 13x8 lipo
35m above Sea Level, 101,3kPa, 14,8°C
Motor: Dymond 3660; 1350rpm/V; 0,9A no-load; 0,0478 Ohms.
Battery: Kokam 3200SHD (18C); 3 cells; 3200mAh @ 3,7V; 0,008 Ohms/cell.
Speed Control: Generic Brushless ESC; 0,006 Ohms; High rate.
Drive System: Aero Naut 13x7; 13x7 (Pconst=1,31; Tconst=0,95) direct drive.
Airframe: Condor 2,5; 44,5dm²; 1443g; 32,4g/dm²; Cd=0,044; Cl=0,55; Clopt=0,76; Clmax=1,09.
Stats: 382 W/kg in; 196 W/kg out; 7,2m/s stall; 8,6m/s opt @ 31% (96:33, 17°C); 10,1m/s level @ 36% (72:11, 17°C); 8,1m/s @ 70,7°; -0,62m/s @ -4,1°.
Possible Power System Problems:
The static full-throttle current (59,2A) exceeds the capability of the specified battery (57,6A at 18C), which will most likely damage the battery and may cause a fire.
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:
At full-throttle and the best lift-to-drag ratio airspeed, the motor is operating approximately between its maximum efficiency current (13,3A) and its current at theoretical maximum output (98,1A). However, it is operating at only 53% efficiency, which is significantly less than its theoretical maximum efficiency (87%). Efficiency may improve at reduced throttle settings.
Aerodynamic Notes:
The static pitch speed (19,4m/s) is within the range of approximately 2,5 to 3 times the model's stall speed (7,18m/s), which is considered ideal for good performance.
With a wing loading of 32,4g/dm², a model of this size will have very sedate flying characteristics. It will be suitable for relaxed flying, in calm or very light wind conditions.
The static thrust (1788g) to weight (1443g) ratio is 1,24:1, which will result in extremely short take-off runs, no difficulty taking off from grass surfaces (assuming sufficiently large wheels), and vertical climb-outs. This model will probably be able to perform a hover or torque roll.
At the best lift-to-drag ratio airspeed, the excess-thrust (1284g) to weight (1443g) ratio is 0,89:1, which will give very steep climbs and incredible acceleration. This model can easily do consecutive loops, and has sufficient in-flight thrust for any aerobatic maneuver.
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.
Proovisin,mis ma proovisin ideaalset ei leidnudki,küll jäi lahjaks,küll läks põlema,küll oli väike ja väheefektiivne jne.
Ühesõnaga abiks nagu oleks aga......
Kas teie teadjad olete suutnud saavutada ideaalseid kalkulatsioone?
Harjumaa-Tallinn-Harjumaa
Spectrum DX9 2,4G
FOX EPO Glider 2,3M
DISCUS CS 2,6M
PROXIMA II 2,8M
CONDOR 2,5M
VOLARE 230
ELIPSOID EVO 280
Hot Pepper 3D
Durafly™ HyperBipe 900mm EPO
Spectrum DX9 2,4G
FOX EPO Glider 2,3M
DISCUS CS 2,6M
PROXIMA II 2,8M
CONDOR 2,5M
VOLARE 230
ELIPSOID EVO 280
Hot Pepper 3D
Durafly™ HyperBipe 900mm EPO