leo_home
08-23-2016, 02:16 PM
Target:
Setup an eletric mono for oval racing in 80kmph range, full throttle right turn with confidence, at race course radius.
JetChopper30 electric setup instructions(view from deck, view from transom, view from port):
Motor and drive shaft offset to right by 5mm.
Drive shaft tilt left, form 1.54 degree with the centre line.(adjustment required)
Drive shaft angle slightly negative. Set hull angle of attack to a small positive angle, for stability.
Drive shaft length(transom to prop. hub) 75mm.
Rudder blade offset to right by 57mm.
Rudder blade length 48mm exceed right bottom plane, triangular cut.
Transom to rudder blade distance 55mm.
Positive rudder caster(bicycle fork).
Right turn rudder blade turn angle 10 degree, 8m turn radius.
Left turn rudder blade turn angle 18 degree, radius proportional to speed.
Turn fin tip 30mm from chine.
Upon triming done, uninstall the trim tab.
CG 30.5% from transom.
Weight bias on left side to produce 0.25Nm moment to counteract with the torque roll.
The hook near the transom shall be grinded off to make a near perfect straight line.
6S 3.3Ah 0.53kg 0.028m from centre line.
Battery cooling plate 0.14kg 0.028m from centre line.
Port iron plate 0.06kg 0.118m from centre line.
EMAX GT2820/04 1460KV 12N14P OUT RUNNER(ext. dim. 3544, over-voltage 6S).
HOBBYWING SKYWALKER 80A moded.
OCTURA X442(D41.4, detongued)
RTR weight 2.63kg.
https://www.youtube.com/watch?v=DsE1JV8IPBo&feature=youtu.be
145618
145619
145620
145622
145621
More drawing and picture coming.
Leo
Setup an eletric mono for oval racing in 80kmph range, full throttle right turn with confidence, at race course radius.
JetChopper30 electric setup instructions(view from deck, view from transom, view from port):
Motor and drive shaft offset to right by 5mm.
Drive shaft tilt left, form 1.54 degree with the centre line.(adjustment required)
Drive shaft angle slightly negative. Set hull angle of attack to a small positive angle, for stability.
Drive shaft length(transom to prop. hub) 75mm.
Rudder blade offset to right by 57mm.
Rudder blade length 48mm exceed right bottom plane, triangular cut.
Transom to rudder blade distance 55mm.
Positive rudder caster(bicycle fork).
Right turn rudder blade turn angle 10 degree, 8m turn radius.
Left turn rudder blade turn angle 18 degree, radius proportional to speed.
Turn fin tip 30mm from chine.
Upon triming done, uninstall the trim tab.
CG 30.5% from transom.
Weight bias on left side to produce 0.25Nm moment to counteract with the torque roll.
The hook near the transom shall be grinded off to make a near perfect straight line.
6S 3.3Ah 0.53kg 0.028m from centre line.
Battery cooling plate 0.14kg 0.028m from centre line.
Port iron plate 0.06kg 0.118m from centre line.
EMAX GT2820/04 1460KV 12N14P OUT RUNNER(ext. dim. 3544, over-voltage 6S).
HOBBYWING SKYWALKER 80A moded.
OCTURA X442(D41.4, detongued)
RTR weight 2.63kg.
https://www.youtube.com/watch?v=DsE1JV8IPBo&feature=youtu.be
145618
145619
145620
145622
145621
More drawing and picture coming.
Leo