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Blue Baby 33 Inch

Started by Mjet, August 26, 2012, 09:36:54 PM

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Mjet

Hi All,
I am a beginner and started to build Blue Baby 33 Inch as my first attempt. I have completed fuselage and body parts.
I would like to thanks Ankur a lot to guide me on each and every points in right direction. I just got his no in this forum and called him for help. he helped me lot without knowing me.
Electronics : Emax 2215 , ESC 30 AMP, Battery – 2200 mah 35 C
Thanks and Regards
Mohan

Mjet

I have done its maiden flight. Take off was OK . but after takeoff , when we try to turn , she will shaky and back to ground. Vertical lift was ok.

So I added ailerons on that and covered the wings by packing tape.

hangingtough

I think main problem is your battery

i think a small battery like 1000-1300 would reduce wait and help you to fly slow

rastsaurabh

Very Nice built......
Yes battery weight, motor & prop size have to be such that they provide enough thrust.....

2215 is a nice motor and recommended prop is of 11x3.8  with 1300mA battery.
try with small battery ( you will face critical CG balancing problem) you may have to increase the nose lenght Adding weight will be equivalent to using 2200mA battery !!!!!

Mjet

Thanks to Saurabh and hangingtough,

True , the battery is heavy. But I don't have the other option or I have to order new one. My Motor is of 313 watt and suggested prop is 10 x 4.7 SF by LHS. So planning to use 2S 2200 mah ,35 C and 3S 2200 mah on that.
I have added small weight ( 10-20 gms ) on nose to balance the plane. If not enough , Pl advise.

Thanks and Regards

rastsaurabh

I personally hate adding weight where we struggle to reduce weight.......
Any weight addition is a penalty in model performance and a desd weight is further -ve.

Anyway at times there is no go.... I had been into this situation but then rather than adding weight i opted to elongate the nose so that the battery pushes more in front to balance CG...

abhay

i persoonally appretiate your reflexes Mjet as a beginner. I would not have been able to control such a large weight for so small wing span wit no dihedral..
for the vibration, i doubt your wing. if you observe from nose, your left wing has a curve.
and how have you reinforced the wing??
I can take off and fly well. Its landing which sucks :banghead::banghead:

Mjet

Hi All,
You were right , I have crashed the blue baby in two pieces  :banghead:. It was has the tendency to go right just after leaving the ground and back to ground with nose. We tried 3-4 times and crashed it.
Small wing and 700 gms weight may the responsible for crash. I could not take Video of Crash.
Need helps from senior members.

Regards