PC21 50e Vario Prop


This is an assembly and customisation article of this popular and sleek military trainer from Sebart.  The model comes in three variations of colours.  The model featured is the third generation, version 3 which has all metal retracts.  The earlier versions were plastic and caused many pilots grief, modifications were mad eon theMKII but many swapped out their retracts for E-flite trike sets with anti-jam feature adding around £120 to the cost of the model. Sebart's third genration has all metal retractsand uses a sequencer circuit to operate the gear. On the sequencer there are two spare pins which  can be used for other items that need to be switched when the gear is triggered. Landing lights?

 However, in this article I am upping the scale looks with a super looking prop just like it's full size counterpart and some customisation.  Some info on the real beast first.

Super Chipmunk Engine Swap

Art Scholl Chipmunk

My 5 year old Super Chipmunk "Pennzoil" from Apache Aviation now supplied by SLEC had always had an ASP180FS up front.  Beautiful sound but I now feel that the model really needed something more substantial power wise.  The ASP180 should be producing around 2.6 hp when tweaked and tuned and I have to say I have tried many props on this motor and never felt really happy.  Plus the fact that the glow fuel residue inside the cowl would slowly weep out and eat the "so called" fuel proof paint on the cowl.  But what could I replace it with. DLE30 or DLE35RA or OS GT33?  After much deliberation I went for the OS GT33.  Coing close to four horse power from this tidy gas engine.  However, the conversion to petrol was not as simple as imagined!

Wots Wot Reverse Engineering?

wots wot ic

If you have read the previous article on the Wots Wot you will have read that this was the electric version.  The basic model comes without any mounting kit. You select the which kit you wish to use, i.e.; electric or glow. In the previous article I built my Wots Wot for electric using a SK3 5045, 660 kV motor.  The plane flew very nicely but I needed a that size motor for another project, and as much as I hate to "cannibalise" working models the motor had to come out.  not wanting a machine that does not fly I decided that a biplane such as this really needs a nice four stroke glow.  The following article describes the conversion back to glow, the opposite to what many do nowadays.

Observer UAV

observer uav

A project article on this Aerial or FPV aircraft from Hobbyking.  Formerly known as the Volantex Ranger it has been updated and re-marketed by HK as Quanum Observer.  The popularity of models with the abilty to carry video cameras has increased dramatically especially if you include multicopters.  However this fixed wing model looks more of a Drone, with it's new grey colouring and rather dramatic looks giving it that menacing appearance.  The airframe is made from blow moulded plastic, slippery surface like nylon, a texture similar to supermarket milk bottles.  The fuselage at just over a meter has a wide body up front and the wing is EPO at nearly 2 meters span with curved down wing tips.  The electric aircraft is of the pusher prop variety.