Yak54 25e


25e Class Aerobat  

 Overview   Specifications   Power Unit   Build comment   Flight Report

Overview

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25 Class 3D Aerobatic model "Yak54", this model is available both  of 0.21cu engine or 450T motor. My choice is  of cause Electric. Because No CO2 available ??? I like electric that's all !! (^^)
When I ordered, I found this model flying weight only 540g. But Kit weight is 690g !! Flying weight is over 1000g 450T motor is available 3D flight !? Of cause not. My 1st choice is 79g motor like a '10e class'. But this 79g motor able to input 420W(60S) ! But this is big problem. Head is too much light. Now Emax 2826 is used.

Specifications

Type Super scale aerobat
Specifications
Motor Emax BL2826
Waypoint E-3020
182g
155g
Propeller Master Airscrew 12x7
25g
Battery
Aerobatic Japan DP3200AB25-3S
256g
ESC Hobby Wing 60A (Switching Bec) 65g
Servo GWS NARO+F HP/BB (1.7Kg/cm)
10g
GWS PARK HPX F (3.0Kg/cm)
19g
Waypoint W-150 x 2  (2.5Kg/cm)
26.8g
Receiver JR 770S
20g
Size
Length 1090mm
Wingspan 1160mm
Wing Area 26dm²
Net Weight
approx 1080g
Flying Weight 1274g
Wing Loading 49.0g/dm²

Power Unit

Just now motor and battery have been changed. HP LVX 2500-3S doesn't have power now. It is aged !? New motor is Waypoint E3020-14. 3S LiPo gives static thrust approx 2Kg and pitch speed 71.3Km/h.
Motor
Waypoint E3020-14
988rpm/volt
155g

Amps rpm chart Amps thrust chart
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Waypoint E3020-14 Measurement data 


Buildup Report

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Flight Report

BL2826 is not powerful. The battery, 1 reason is 'HP LVX25003S is a little bit old' and Motor problem. I test DS1600AB25-3S that load current 30A. Result is very nice. When 30A load, 11.3V output ! Unbelievable good performance.
Anyhow, this model flight feeling is also good stable and easy to control.
Photo
Photo Flight Video
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Youtube
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