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« Reply #25 on: August 08, 2013, 02:30:57 AM »
FlyingBrick
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Great build !

Since you have already flown the model, please share your views on theoritical calculations vis a vis your practical measurements http://adamone.rchomepage.com/calc_motor.htm . How close are these ?

thanks !
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« Reply #26 on: August 08, 2013, 08:00:33 AM »
sanjayrai55
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This software says my motor current is out of range.

See, the way I work it:

High winger sports model, so 75 W per lb = 300 W
Reserve power @ 20%, total power = 360 W

Motor with 10*7 prop gives 440 W

So I use this motor. In practice, the model in normal flight flies with ~ 200 W.I get 10 min flight time with 3300 mAh pack.

Actually measured: Flying time 3:51 minutes, battery consumption was 33% as measured.

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« Reply #27 on: August 08, 2013, 10:20:59 AM »
vishalrao
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Congratulations on the successful maiden. Very funny indeed Smiley Even I was expecting the motor to be underpowered. However, all's well that ends well  Thumbs Up
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« Reply #28 on: August 08, 2013, 10:32:05 AM »
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Wonderful build sir. I always like sticks  Clap Clap Clap
When I come back, I may build this and put an O.S. 46 in it.
That would definitely be a screamer.  Tongue
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« Reply #29 on: August 08, 2013, 12:19:13 PM »
VC
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Sirjee, the way you are going, you will soon need another house to keep your models. Its getting to be a habit of admiring your masterpieces at such short intervals. Beautiful bird, as usual. Girish bhai.................. Thumbs Up
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« Reply #30 on: August 08, 2013, 12:50:23 PM »
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Pretty neat and nice build sir! Thumbs Up
instead of electric motor , you could have planned glow sir!
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« Reply #31 on: August 08, 2013, 02:16:38 PM »
girishsarwal
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It was amazing to maiden this. On the field, we just chanted a little and I gave full throttle. It just took off, less than 15 ft. In fact the initial climb was almost vertical so it is for sure not underpowered. And then to counter that we ended up overtrimming. Visibility was less so I lost orientation when the model was about 300m and it tumbled around a little before orientation was restored. Fun flying this model;

And nincompoops on the landing strip have their own definition of "I have a plane to catch"...Cheesy:D
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« Reply #32 on: August 08, 2013, 02:33:40 PM »
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Sanjay Sir, very clean and beautiful build Clap

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« Reply #33 on: August 08, 2013, 05:57:42 PM »
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Sanjay sir, i like your building skill Drool Clap Hats Off superb finish Bow
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« Reply #34 on: August 08, 2013, 09:17:56 PM »
sanjayrai55
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Congratulations on the successful maiden. Very funny indeed Smiley Even I was expecting the motor to be underpowered. However, all's well that ends well  Thumbs Up

Thanks Vishal

Actually, in my very little experience with electrics, what I have seen is a high winger, even a sports model, with a large wing area like the Spadstick needs only about 50 W per lb to fly. You do need 75 though, for take-off and mild aerobatics
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« Reply #35 on: August 08, 2013, 09:19:38 PM »
sanjayrai55
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Beautiful bird, as usual. Girish bhai.................. Thumbs Up

VC sir, it's always a feel-good to read your compliments
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« Reply #36 on: August 08, 2013, 09:20:53 PM »
sanjayrai55
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Sanjay Sir, very clean and beautiful build Clap



Mohan...thanks so much! Time for you to start the Spadet again, only this time keep it light, light, light Cheesy
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« Reply #37 on: August 08, 2013, 09:26:57 PM »
sanjayrai55
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Pretty neat and nice build sir! Thumbs Up
instead of electric motor , you could have planned glow sir!

Thank you Praveen. This model is actually meant for a 40 size glow! However, due to field problems, I prefer Electric nowadays. They are also more convenient, no starting paraphernalia, no mess to clean up Cheesy
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« Reply #38 on: August 08, 2013, 09:28:42 PM »
sanjayrai55
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Sanjay sir, i like your building skill Drool Clap Hats Off superb finish Bow

Thank you RC Maker
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« Reply #39 on: August 08, 2013, 09:36:40 PM »
girishsarwal
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VC sir, thanks for the thumbs up. I didn't do much though. The build speaks for itself. The stick flew on its own once it was trimmed.
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« Reply #40 on: August 08, 2013, 09:37:27 PM »
sanjayrai55
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It was amazing to maiden this. On the field, we just chanted a little  

And nincompoops on the landing strip have their own definition of "I have a plane to catch"...Cheesy:D

Girish: Those were not chants, they were magical mantras of great power Cheesy Cheesy

To manage crowd control, we will keep a mascot: a huge dog - Great Dane seems good Grin
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« Reply #41 on: August 08, 2013, 09:43:40 PM »
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You're feeling so German sir! nicht?
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« Reply #42 on: August 08, 2013, 09:47:20 PM »
sanjayrai55
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Jawohl!  ROFL
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« Reply #43 on: August 09, 2013, 09:15:31 AM »
vishalrao
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To manage crowd control, we will keep a mascot: a huge dog - Great Dane seems good Grin

 Giggle Ha ha ha. That's an excellent idea. Sure will keep bystanders from touching and messing with the models.
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« Reply #44 on: August 09, 2013, 09:30:29 AM »
sanjayrai55
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http://www.debiwolfreeves.co.uk/wp-content/uploads/2012/10/Dog_attack21.jpg
Spadstick - Electric (full size)


Flew her again today after reducing throws. A sporty model is a sporty model. Flies smooth and fast, even at less than half throttle. Very responsive to controls.
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« Reply #45 on: August 09, 2013, 09:34:05 AM »
sanjayrai55
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Maahin   Thanks

If you are going to build it in Nitro, use a 4 mm Corro fuse.
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« Reply #46 on: August 09, 2013, 10:22:01 AM »
girishsarwal
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Someones getting the run of his life, for his life...farhans next movie plot is ready
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« Reply #47 on: April 26, 2014, 01:36:54 PM »
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I would like to get suggestion regarding the electric parts  for SpadStick that i am  building. Currently i have the following parts with me.

propeller I am going to place

Master Airscrew propeller 6x4 OR TGS Sport 6x4E Precision propeller

Motor

NTM Prop Drive Series 2836 2200kv

Battery

Turnigy nano-tech 2200mah 3S 35~70C Lipo Pack

Should i go with this setup or can anyone Please suggest another.

Thank you.
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« Reply #48 on: April 26, 2014, 01:48:26 PM »
sanjayrai55
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This model was originally designed for a 40-46 size engine, ie about 750 Watts+

When I built it, I really worked on reducing the weight, and got it to about 1.8 Kg, against the original 2.5 Kg ++

Thus it would need a motor of at least 1.5 Kg thrust, not being a trainer but in fact a sports model. Going by the usual norms of 125 Watts/lb for the sports model, you need a motor of about 500 W. Looking at the size too, a prop of minimum 10*7 is needed, with 11*7 preferred

The proposed NTM motor and it's recommended prop will give nowhere near the kind of thrust needed. In fact with the battery you propose, you will get only about 600 gms of thrust, that too at full throttle! The model will not fly.

You need a lower speed, higher torque motor. I used a 3542-1250 KV I think, and it was adequate with a 10*7 prop, and 60 A ESC, giving me about 7 minutes normal flying on a 3300 mAh 35-60 C Lipo

I am not trying to dissuade you, but remember, heavier models need higher torque motors; high speed motors are better suited for light fast models like jets typically

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« Reply #49 on: April 26, 2014, 02:01:56 PM »
avinvarghese
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The electric parts i mentioned above was actually brought for Axon FPV. I will go for lower speed, higher torque motor and other parts mentioned by you for SpadStick. @sanjayrai55 Thank you.
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