Thursday, June 13, 2019

Steve's Radian build cheat sheet


Radian Custom Build




The Horizon Hobby Radian is an epic plane, beloved by experienced pilots and newbies.  In the summer months, what better plane to build?   Should you buy the Night Radian?  If you find yourself replacing the EC3 battery connector, and the Spektrum receiver why not just build it from the ground up?   And don't even get me started on the stock motor or the propellers built onto the spinner.  So, here's my source list of "Dream parts" for the plane  From start to finish this is what it will cost.


The Foam & Canopy  `$78

(All Pirces in US Dollars)

The foam comes in three pieces that are sold the price doesn't include the decal set.   This is for the non-Night Radian  If you feel like painting it and laminating it or putting on Plastidip or something else be sure to use Krylon Foam Primer.   Inventory fluctuates, but parts can often be found at hobby stores if you haappen to have one close by.




Main wings w/ spar- $35https://www.horizonhobby.com/main-wing-with-spar%3A-radian-pkz4720



Radian Fuselage-  $28
https://www.horizonhobby.com/bare-fuselage%3A-radian-pkz4767


Radian Horizontal Stabilizer  $10 
https://www.horizonhobby.com/horizontal-tail%3A-radian-pro-pkz4725

Canopy $4
https://www.horizonhobby.com/canopy%3A-radian-pro-pkz4713



All the other parts



Servos  - $18 for two

JX PDI-1171MG 17g Metal Gear Core Motor Micro Digital Servo





 If you happen to have some 15-17g servos laying around you can use them.  Or you can use the  Hitec HS-81.   Staying clear of the plastic servos for this build I am suggesting this one, a metal gear servo.   You will need two.   Be sure to cut the servo arms down so that the arms don't make contact with each other in the fuselage.



https://www.banggood.com/JX-PDI-1171MG-17g-Metal-Gear-Core-Motor-Micro-Digital-Servo-for-RC-Models-p-1075298.html?rmmds=search&cur_warehouse=USA


Speed controller-$15
Though you could get away with a 30A ESC for this build, we'll plat it safe.  For this price it comes with either an XT60 connector or a Deans connector.

Image result for fms speed controller

https://www.banggood.com/FMS-Predator-40A-Brushless-ESC-With-3A-Switch-BEC-T-XT60-Plug-for-RC-Models-p-1105060.html?rmmds=search&ID=512584&cur_warehouse=CN


Spinner-$13
If you are following along with the suggested build parts




Option C for the 4mm shaft for the suggested motor. Leapord motor or

Option D for the suggested Emax motor.

Otherwise, select the option that works with your shaft.  The size of the spinner for hte Radian is 50mm

https://www.banggood.com/Gemfan-Aluminium-CNC-Spinner-3mm-Pitch-50mm-Diameter-For-Folding-Propeller-1Pcs-p-1156633.html?rmmds=search&ID=510594&cur_warehouse=CN

Propellers  $4
The 11 inch propeller is slightly oversized for the motor.   It's an 11x8 when it calls for an 11x7.   This is for a 3S battery.  Be certain to pick up a few sets of props.

https://www.banggood.com/Gemfan-Electric-Nylon-Folding-Propeller-7060-7540-8050-9050-1060-1180-1280-1380-1-Pair-p-983784.html?rmmds=search&ID=517471&cur_warehouse=CN


Radian Motor Mount  $16

In order to fit an aftermarket Radian motor onto your plane you'll need a Radian motor mount sold by Small Parts CNC.     You will not need this option if you select the Emax motor, it will bolt onto the Radian without the need of an adapter.

http://smallpartscnc.com/index.php?route=product/product&filter_name=Radian&product_id=97

If he's out of stock, write to Terry @  Info@smallpartscnc.com  He'll get right back to you.



Motor

Leapord LC3536 960KV-Best motor!!!!  $30

This is a premium motor, and it's worth every penny!  It's well made  It's a 2-4S motor.  It will provide around 1800g (63oz) `4lbs  of thrust.  The flying weight of a Night Radian (a heavier build) is half this weight.  Thus, you'll have enough thrust to keep you out of trouble, and yes it will fly nice on 2S.




https://www.altitudehobbies.com/products/leopard-3536-8t-960kv-brushless-airplane-motor

Also good

Emax $25

This is the Emax version, it can take up to 3S.  The motor mount will work but the shaft size of this is 5mm as oppoosed to the 4mm for the Leapord motor.





Adding it up

The cost of the foam  $78

Everything else

Emax Version  $75
Leapord Version $95



Overall $150-$180

You will still need a receiever.  But, this is a complete build.   Other than the decal set which you can decidet buy or not, there are no missing parts.





















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