Энергетические системы

-
Turnigy L5055B-600 Brushless Походный 600kv59,64 A$Turnigy L5055B-600 Brushless Походный 600kvLearn More
Характеристики:
Размер: 50мм х 55мм
Вес: 296g (с разъемами 4м)
Kv: 500rpm / V
Напряжение: 11.1V ~ 29.6v (3s ~ 8s)
Максимальная мощность: 1500 Вт
Максимальный ток: 55A
Максимальная эффективность: 85% @ 35A
Нет тока нагрузки: 2.6A
Внутреннее сопротивление: 0,22
Диаметр вала: 6мм
-
Turnigy ROTOMAX 100cc Размер Brushless Походный Мотор 167kv612,69 A$Обновите размер 100cc модель газового двигателя с скороход двигателя Turnigy ROTOMAX 100cc БПТ. Этот двигатель обеспечит чистую и эффективную мощность для крупномасштабного самолета без беспорядка и хлопот топлива.
В сочетании с 12s батареей LiPoly, 27x12 Пропеллер и 250Amp ESC Так ROTOMAX двигатель будет поставлять пробивной, отзывчивую мощность, что только электрическая установка может обеспечить.
Этот двигатель особенно подходит для углеродного волокна и деревянных пропеллеров и особенности стиля 6 дизайн отверстие под болт IC. Вал также прослушиваются в соответствии с 5 мм болт, чтобы сделать подгонки вертушку по вашему выбору легко.
Спекуляция
Learn More
Аккумулятор: 12 Cell / 44.4V
RPM: 167kv
Максимальный ток: 170А
Вт: 7992w
Нет ток нагрузки: 44V / 4.5A
Внутреннее сопротивление: 0,021 Ом
Вес: 2074g
Поляк Количество: 24
Диаметр вала: 10мм
Похожие ESC: 250A 12S Совместимость
Похожие Опора: 27x12 -
Turnigy RotoMax 50 куб. Бесщеточный двигатель аутраннера403,47 A$Обновите свою модель газового двигателя объемом 50 куб. См с помощью бесщеточного двигателя Turnigy RotoMax объемом 50 куб. См. Этот двигатель обеспечит чистую и эффективную мощность для вашего крупногабаритного самолета без беспорядка и проблем с топливом.
Learn More -
Micro Servo Разъем Свинец 1,25 Pitch - Штекер (5 шт / мешок)2,44 A$Micro Servo Разъем Свинец 1,25 Pitch - Штекер (5 шт / мешок)
Learn More
Спекуляция
Длина: 70мм
Тип штепсельной вилки: 1.25 Pitch Micro
-
Micro Servo Разъем Свинец 1,25 Pitch - мужчина штепсельной вилки (5 шт / мешок)2,44 A$Micro Servo Разъем Свинец 1,25 Pitch - мужчина штепсельной вилки (5 шт / мешок)
Learn More
Спекуляция
Длина: 70мм
Тип штепсельной вилки: 1.25 Pitch Micro -
NTM Prop Drive 42 серии Комплект принадлежностей6,90 A$Learn MoreСтандартная комплектация для двигателей 42 серии NTM Prop Drive.
CNC Обработанные (внимательно посмотреть на крест смонтировать, даже то, что подвергается механической обработке, а не пробивал) из заготовки 6061 сплава для прочности и баланса.Производится в доме по hexTronik, чтобы сократить расходы и обеспечить лучшее значение для Вас!
Диаметр вала: 8мм
Длина вала: 26мм
Перекрестные Болт пластины Отверстия: 49мм
Вес: 40.1g (Всего) -
Комплект принадлежностей для 63 серии Motors8,47 A$Learn MoreСтандартная комплектация для двигателей серии 63.
CNC Обработанные (внимательно посмотреть на крест смонтировать, даже то, что подвергается механической обработке, а не пробивал) из заготовки 6061 сплава для прочности и баланса.Производится в доме по hexTronik, чтобы сократить расходы и обеспечить лучшее значение для Вас!
Диаметр вала: 10мм
Длина вала: 49мм
Перекрестные Болт пластины Отверстия: 70ммМонтаж двигателя Отверстия под болты: 30мм и 44мм
Вес: 85g (Всего) -
Turnigy Trackstar 540-13T Brushed Motor & 60A ESC Combo for 1/10th Crawler51,05 A$The motor is a powerful, high torque open brush gear 540 motor, brushes can be changed when they wear out and this is matched to a 60amp ESC. The Trackstar Crawler ESC has been specifically designed for RC crawlers and brushed motors. It gives an excellent linear response and driving feel, has a low internal resistance, excellent heat dissipation, and multiple protection features (see features below). It can be easily programmed with the optional pocket-sized LED program card (see related items) with a variety of different settings including; Initial Start Force, Low Voltage Cut-Off, Initial Drag Brake Force, Maximum Reverse Force, and 3 Start Modes.
Learn More -
Turnigy Trackstar 540-16T Brushed Motor & 60A ESC Combo for 1/10th Crawler51,05 A$The motor is a powerful, high torque open brush gear 540 motor, brushes can be changed when they wear out and this is matched to a 60amp ESC. The Trackstar Crawler ESC has been specifically designed for RC crawlers and brushed motors. It gives an excellent linear response and driving feel, has a low internal resistance, excellent heat dissipation, and multiple protection features (see features below). It can be easily programmed with the optional pocket-sized LED program card (see related items) with a variety of different settings including; Initial Start Force, Low Voltage Cut-Off, Initial Drag Brake Force, Maximum Reverse Force, and 3 Start Modes.
Learn More -
Turnigy Trackstar 540-20T Brushed Motor & 60A ESC Combo for 1/10th Crawler51,05 A$The motor is a powerful, high torque open brush gear 540 motor, brushes can be changed when they wear out and this is matched to a 60amp ESC. The Trackstar Crawler ESC has been specifically designed for RC crawlers and brushed motors. It gives an excellent linear response and driving feel, has low internal resistance, excellent heat dissipation and multiple protection features (see features below). It can be easily programmed with the optional pocket sized LED program card (see related items) with a variety of different settings including; Initial Start Force, Low Voltage Cut-Off, Initial Drag Brake Force, Maximum Reverse Force and 3 Start Modes.
Learn More -
Trackstar 540-1320KV 35T Carbon Brushed Motor for 1/10th Crawlers14,93 A$An excellent open carbon brush gear 540 35T motor that has been designed for, and is perfect for RC crawlers. Having the brush gear open means that maintenance, cleaning, and brush changing is a very simple task. The low 1320KV means masses of low down torque which makes it ideal for climbing steep and rough terrain at controllable low speeds.
Learn More -
PROPDRIVE V2 4258 500KV Reversed Shaft Brushless Outrunner Motor62,26 A$PROPDRIVE v2 motors are designed to perform right out of the box with tight windings, smooth bearings, correctly rated magnets, precision cut stator, and balanced rotors.
We design and build the PROPDRIVE v2 motors in-house, allowing us to control every aspect of production. We control the entire production line from material sourcing to machining, balancing, and final assembly. PROPDRIVE motors can be trusted to provide years of reliable service at a price every modeler can afford.Performance Data (5S):
15x6: 796W, 45A, 3338g static thrust
15x8: 970W, 56A, 4151g static thrust
16x7: 1053W, 60A, 4259g static thrust
Learn More
Performance Data (6S):
13x6.5: 896W, 42A, 3567g static thrust
13x8: 1042W, 50A, 4214g static thrust
14x7: 1170W, 56A, 4439g static thrust -
DYS D2225 2000KV Brushless Motor 2-3S For Multicopters RC Fixed-wing Aircraft19,41 A$DYS D2225/13 2000KV Brushless Outrunner Motor
Specs:
Learn More
Battery: 2~3 Cell /7.4~11.1V
RPM: 2000kv
Max current: 11A
Max power: 122W
Internal resistance: 0.143 ohm
Weight: 32g (including connectors)
Diameter of shaft: 3.17mm
Dimensions: 22x25mm
Prop size: 6x4/6x5 -
DYS D2225 1350KV Brushless Motor 2-3S For Multicopters RC Fixed-wing Aircraft19,41 A$DYS D2225/19 1350KV Brushless Outrunner Motor
Specs:
Learn More
Battery: 2~3 Cell /7.4~11.1V
RPM: 1350kv
Max current: 8.2A
Max power: 105W
Internal resistance: 0.203 ohm
Weight: 32g (including connectors)
Diameter of shaft: 3.17mm
Dimensions: 22x25mm
Prop size: 6x5/7x3 -
RocketRC 4082 1120KV 4 Pole Brushless Marine Motor w/Water Cooling Jacket (5mm Shaft)89,65 A$This original SURPASS HOBBY RocketRC 4082 4-pole marine brushless motor is designed to provide both quality and performance at an affordable price. It is built using high-quality aluminum alloy and has been designed for use with 600~1000mm RC boats. Its high power and rotation speeds provide long run times without compromising performance. This motor is a perfect fit for the Traxxas M41 Catamaran Spartan.
Learn More
Features:
• Hand-wound for maximum copper fill.
• Precision-balanced rotor
• Built from CNC machined 6061 T6 billet aluminum
• Super thin (0.2mm) laminations stator
• Fitted with a super efficient cooling-jacket -
Rocket Surpass 2826-2000KV Sensorless Brushless Outrunner Motor30,90 A$The Rocket Surpass range of brushless motors is precision-made using the latest manufacturing processes. The heatsink can is CNC machined from a solid billet of 6061 T6 aluminum, high-purity copper is used for the windings for improved efficiency, and oversized bearings are used for durability. The stator has super thin (0.2mm) laminations, and the rotor is then precision balanced for reliability, and ultra-smooth running at maximum RPMs.
Learn More -
Rocket Surpass 4076-2025KV 1/8 Scale Monster Truck/Truggy Sensorless Brushless Motor73,21 A$The Rocket Surpass range of brushless motors is precision-made using the latest manufacturing processes. The heatsink can is CNC machined from a solid billet of 6061 T6 aluminum, high-purity copper is used for the windings for improved efficiency, and oversized bearings are used for durability. The stator has super thin (0.2mm) laminations, and the rotor is then precision balanced for reliability, and ultra-smooth running at maximum RPMs.
Learn More
The Rocket Surpass 4076-2025KV motor has been specially built for 1/8th scale monster trucks and truggies. This 4-pole, 12-slot high-torque motor is water and dust-proof and features a universal mounting system to fit just about all 1/8th-scale vehicles. -
Rocket Surpass 2822-1740KV Sensorless Brushless Outrunner Motor26,88 A$The Rocket Surpass range of brushless motors is precision-made using the latest manufacturing processes. The can is CNC machined from a solid billet of 6061 T6 aluminum, high-purity copper is used for the windings for improved efficiency, and oversized bearings are used for durability. The stator has super thin (0.2mm) laminations, and the rotor is then precision balanced for reliability, and ultra-smooth running at maximum RPMs.
Learn More
The Rocket Surpass 2822-1740KV motor suits sport, scale, and 3D-type models. This robust motor suits LiPo batteries from 2~3S, and a range of props from 4~6". This motor on test with a 3S battery gave 100W of power at 9.5A, making it a great motor for small models. The motor is supplied with a machined prop adapter, complete with mounting bolts, allowing it to be mounted either way round. -
Rocket Surpass 2830-1130KV Sensorless Brushless Outrunner Motor37,33 A$The Rocket Surpass range of brushless motors is precision-made using the latest manufacturing processes. The can is CNC machined from a solid billet of 6061 T6 aluminum, high-purity copper is used for the windings for improved efficiency, and oversized bearings are used for durability. The stator has super thin (0.2mm) laminations, and the rotor is then precision balanced for reliability, and ultra-smooth running at maximum RPMs.
Learn More
The Rocket Surpass 2830-1130KV motor suits sport, scale, and 3D-type models. This robust motor suits LiPo batteries from 2~3S, and a range of props from 8~12". This motor on test with a 3S battery gave 200W of power at 19A, making it a great motor for small to medium size models. The motor is supplied with a machined prop adapter, complete with mounting bolts, allowing it to be mounted either way round. -
Rocket Surpass 3536-1050KV Sensorless Brushless Outrunner Motor40,33 A$The Rocket Surpass range of brushless motors is precision-made using the latest manufacturing processes. The can is CNC machined from a solid billet of 6061 T6 aluminum, high-purity copper is used for the windings for improved efficiency, and oversized bearings are used for durability. The stator has super thin (0.2mm) laminations, and the rotor is then precision balanced for reliability, and ultra-smooth running at maximum RPMs.
Learn More
The Rocket Surpass 3536-1050KV motor suits sport, scale, and 3D-type models. This robust motor suits LiPo batteries from 2~4S, and on test with a 4S battery gave 650W of power at 49A, making it a great motor for medium-size models. The motor is supplied with a machined prop adapter, complete with mounting bolts, allowing it to be mounted either way round. -
Rocket Surpass 3542-1250KV Sensorless Brushless Outrunner Motor43,32 A$The Rocket Surpass range of brushless motors is precision-made using the latest manufacturing processes. The can is CNC machined from a solid billet of 6061 T6 aluminum, high-purity copper is used for the windings for improved efficiency, and oversized bearings are used for durability. The stator has super thin (0.2mm) laminations, and the rotor is then precision balanced for reliability, and ultra-smooth running at maximum RPMs.
Learn More
The Rocket Surpass 3542-1250KV motor suits sport, scale, and 3D-type models. This robust motor suits LiPo batteries from 3~4S, and on test with a 4S battery gave 707 watts of power at 52A, making it a great motor for medium-size models. The motor is supplied with a machined prop adapter, complete with mounting bolts, allowing it to be mounted either way round. -
Rocket surpass 3548-840kv Brushless Outrunner Motor59,76 A$The Rocket Surpass range of brushless motors is precision-made using the latest manufacturing processes. The heatsink can is CNC machined from a solid billet of 6061 T6 aluminum, high-purity copper is used for the windings for improved efficiency, and oversized bearings are used for durability. The stator has super thin (0.2mm) laminations, and the rotor is then precision balanced for reliability, and ultra-smooth running at maximum RPMs.
Learn More
The Rocket Surpass 3548-840KV motor suits sport, scale, and 3D-type models. This robust motor suits LiPo batteries from 3~4S, and on test with a 4S battery gave 685 watts of power at 50A, making it a great motor for medium-size models. The motor is supplied with a machined prop adapter, complete with mounting bolts, allowing it to be mounted either way round. -
Rocket Surpass 5045-500KV Sensorless Brushless Outrunner Motor75,30 A$The Rocket Surpass range of brushless motors is precision-made using the latest manufacturing processes. The heatsink can is CNC machined from a solid billet of 6061 T6 aluminum, high-purity copper is used for the windings for improved efficiency, and double-shielded oversized bearings are used for durability. The motor includes sintered neodymium magnets, the stator has super thin (0.2mm) laminations, and the rotor is precision balanced for reliability, and ultra-smooth running at maximum RPMs.
Learn More
The Rocket Surpass 5045-500KV motor suits sport, scale, and 3D-type models. This robust motor suits LiPo batteries from 5~7S, and on test with a 6S battery gave 1217 watts of power at 58A, making it a great motor for the larger models. The motor is supplied with a machined prop adapter, complete with mounting bolts, allowing it to be mounted either way round. -
Rocket Surpass 5065-236KV Sensorless Brushless Outrunner Motor91,14 A$The Rocket Surpass range of brushless motors is precision-made using the latest manufacturing processes. The heatsink can is CNC machined from a solid billet of 6061 T6 aluminum, high-purity copper is used for the windings for improved efficiency, and double-shielded oversized bearings are used for durability. The motor includes sintered neodymium magnets, the stator has super thin (0.2mm) laminations, and the rotor is precision balanced for reliability, and ultra-smooth running at maximum RPMs.
Learn More
The Rocket Surpass 5065-236KV motor suits sport, scale, and 3D-type models. This robust motor suits LiPo batteries up to 10S, on test with a 10S battery it produced an incredible 2000 watts of power at 57A, making it a great motor for the larger models. The motor is supplied with a machined prop adapter, complete with mounting bolts, allowing it to be mounted either way round. -
Rocket Surpass 5065-275KV Sensorless Brushless Outrunner Motor91,14 A$The Rocket Surpass range of brushless motors is precision-made using the latest manufacturing processes. The heatsink can is CNC machined from a solid billet of 6061 T6 aluminum, high-purity copper is used for the windings for improved efficiency, and double-shielded oversized bearings are used for durability. The motor includes sintered neodymium magnets, the stator has super thin (0.2mm) laminations, and the rotor is precision balanced for reliability, and ultra-smooth running at maximum RPMs.
Learn More
The Rocket Surpass 5065-275KV motor suits sport, scale, and 3D-type models. This robust motor suits LiPo batteries from 6 to 10S, on test with a 10S battery it produced an incredible 2300 watts of power at 65A, making it a great motor for the larger models. The motor is supplied with a machined prop adapter, complete with mounting bolts, allowing it to be mounted either way round. -
Rocket Surpass 2826-1000KV Sensorless Brushless Outrunner Motor31,37 A$The Rocket Surpass range of brushless motors is precision-made using the latest manufacturing processes. The heatsink can is CNC machined from a solid billet of 6061 T6 aluminum, high-purity copper is used for the windings for improved efficiency, and double-shielded oversized bearings are used for durability. The motor includes sintered neodymium magnets, the stator has super thin (0.2mm) laminations, and the rotor is precision balanced for reliability, and ultra-smooth running at maximum RPMs.
Learn More
The Rocket Surpass 2826-1000KV motor suits sport, scale, and 3D-type models. This robust motor suits LiPo batteries from 2 to 3S, on test with a 3S battery it produced 173 watts of power at 16A, making it a great motor for the smaller models. The motor is supplied with a machined prop adapter, complete with mounting bolts, allowing it to be mounted either way round. -
Rocket Surpass 3536-1300KV Sensorless Brushless Outrunner Motor49,30 A$The Rocket Surpass range of brushless motors is precision-made using the latest manufacturing processes. The heatsink can is CNC machined from a solid billet of 6061 T6 aluminum, high-purity copper is used for the windings for improved efficiency, and double-shielded oversized bearings are used for durability. The motor includes sintered neodymium magnets, the stator has super thin (0.2mm) laminations, and the rotor is precision balanced for reliability, and ultra-smooth running at maximum RPMs.
Learn More
The Rocket Surpass 3536-1300KV motor suits sport, scale, and 3D-type models. This robust motor suits LiPo batteries from 3 to 4S, on test with a 4S battery it produced 526 watts of power at 38A, making it a great motor for the medium size models. The motor is supplied with a machined prop adapter, complete with mounting bolts, allowing it to be mounted either way round. -
Rocket Surpass KK2845-5900KV 1/12~14th Scale Waterproof Car/Truck Sensorless Brushless Motor30,92 A$The Rocket Surpass range of brushless motors is precision-made using the latest manufacturing processes. The heatsink can is CNC machined from a solid billet of 6061 T6 aluminum, high-purity copper is used for the windings for improved efficiency, and oversized ABEC5 high-speed bearings are used for durability. The stator has super thin (0.35mm) laminations, and the rotor is then precision balanced for reliability and ultra-smooth running at maximum RPMs.
Learn More
The Rocket Surpass KK2845-5900KV motor has been specially built for 1/12~14th size RC cars and trucks and is totally waterproof for use in extreme conditions. This powerful 4-pole, 12-slot motor features a universal mounting system so that it will fit just about all 1/12~14th scale vehicles. -
Rocket Surpass 3650-5400KV 1/10th Scale RC Car/Truck Sensorless Brushless Motor43,32 A$The Rocket Surpass range of brushless motors is precision-made using the latest manufacturing processes. The heatsink can is CNC machined from a solid billet of 6061 T6 aluminum, high-purity copper is used for the windings for improved efficiency, and oversized ABEC5 high-speed bearings are used for durability. The stator has super thin (0.35mm) laminations, and the rotor is then precision balanced for reliability and ultra-smooth running at maximum RPMs.
Learn More
The Rocket Surpass 3650-5400KV motor has been specially built for 1/10th size RC cars and trucks and is water and dust-resistant for use in demanding conditions. This powerful 4-pole, 12-slot motor features a universal mounting system so that it will fit just about all 1/10th scale vehicles. -
Rocket Surpass 3650-4500KV 1/10th Scale RC Car/Truck Sensorless Brushless Motor43,32 A$The Rocket Surpass range of brushless motors is precision-made using the latest manufacturing processes. The heatsink can is CNC machined from a solid billet of 6061 T6 aluminum, high-purity copper is used for the windings for improved efficiency, and oversized ABEC5 high-speed bearings are used for durability. The stator has super thin (0.35mm) laminations, and the rotor is then precision balanced for reliability and ultra-smooth running at maximum RPMs.
Learn More
The Rocket Surpass 3650-4500KV motor has been specially built for 1/10th size RC cars and trucks and is water and dust-resistant for use in demanding conditions. This powerful 4-pole, 12-slot motor features a universal mounting system so that it will fit just about all 1/10th scale vehicles. -
Rocket Surpass 3660-4500KV 3T 1/10th Scale RC Car/Truck Sensorless Brushless Motor40,33 A$The Rocket Surpass range of brushless motors is precision-made using the latest manufacturing processes. The heatsink can is CNC machined from a solid billet of 6061 T6 aluminum, high-purity copper is used for the windings for improved efficiency, and oversized ABEC5 high-speed bearings are used for durability. The stator has super thin (0.35mm) laminations, and the rotor is then precision balanced for reliability and ultra-smooth running at maximum RPMs.
Learn More
The Rocket Surpass 3660-4500KV motor has been specially built for 1/10th size RC cars and trucks and is water and dust-resistant for use in demanding conditions. This powerful 3T, 4-pole, 12-slot motor features a universal mounting system so that it will fit just about all 1/10th scale vehicles. -
Rocket Surpass 3665-4500KV 2T 1/10th Scale RC Car/Truck Sensorless Brushless Motor44,82 A$The Rocket Surpass range of brushless motors is precision-made using the latest manufacturing processes. The heatsink can is CNC machined from a solid billet of 6061 T6 aluminum, high-purity copper is used for the windings for improved efficiency, and oversized ABEC5 high-speed bearings are used for durability. The stator has super thin (0.35mm) laminations, and the rotor is then precision balanced for reliability and ultra-smooth running at maximum RPMs.
Learn More
The Rocket Surpass 3665-4500KV motor has been specially built for 1/10th size RC cars and trucks and is water and dust-resistant for use in demanding conditions. This powerful 3T, 4-pole, 12-slot motor features a universal mounting system so that it will fit just about all 1/10th scale vehicles. -
Turnigy TrackStar Modified 540 4.5T (1~2S) 1/10th Scale Sensored Brushless Motor119,54 A$Specs:
Learn More
Type: Turnigy TrackStar Modified 540 Sensored Brushless Motor
Scale: 1/10th (modified class)
Poles: 2
Turns: 4.5
KV: 7800KV
Sensored: Yes (Standard 6-pin lead)
Sensor Lead: Included
Input Voltage: 3.7~7.4V (1~2S)
Max Current: 108A
Max Watts: 490
Resistance: 0.0029 ODM
Motor Diameter: 35.8mm
Motor Length: 52mm
Shaft Diameter: 3.175mm
Shaft Length: 13.9mm
Mounting Screw Threads: 6 x M3
Mounting Screw Centers: 25.2mm
Weight: 165g -
Turnigy TrackStar Modified 540 5.5T (1~2S) 1/10th Scale Sensored Brushless Motor119,54 A$Specs:
Learn More
Type: Turnigy TrackStar Modified 540 Sensored Brushless Motor
Scale: 1/10th (modified class)
Poles: 2
Turns: 5.5
KV: 6300KV
Sensored: Yes (Standard 6-pin lead)
Sensor Lead: Included
Input Voltage: 3.7~7.4V (1~2S)
Max Current: 108A
Max Watts: 430
Resistance: 0.0041 ODM
Motor Diameter: 35.8mm
Motor Length: 52mm
Shaft Diameter: 3.175mm
Shaft Length: 13.9mm
Mounting Screw Threads: 6 x M3
Mounting Screw Centers: 25.2mm
Weight: 165g -
Turnigy TrackStar Modified 540 8.5T (1~3S) 1/10th Scale Sensored Brushless Motor119,54 A$Specs:
Learn More
Type: Turnigy TrackStar Modified 540 Sensored Brushless Motor
Scale: 1/10th (modified class)
Poles: 2
Turns: 8.5
KV: 4350KV
Sensored: Yes (Standard 6-pin lead)
Sensor Lead: Included
Input Voltage: 3.7~11.1V (1~3S)
Max Current: 80A
Max Watts: 340
Resistance: 0.0098 ODM
Motor Diameter: 35.8mm
Motor Length: 52mm
Shaft Diameter: 3.175mm
Shaft Length: 13.9mm
Mounting Screw Threads: 6 x M3
Mounting Screw Centers: 25.2mm
Weight: 165g
Login and Registration Form