Eflite UMX MiG 15 DF

 E-Flite, Horizon Hobby UK, Spektrum  Comments Off on Eflite UMX MiG 15 DF
May 042012
 

I received a new UMX MiG-15 DF from Eflite. This is the latest AS3X model from Eflite, it is also their first Ducted Fan Ultra Micro Aircraft.

It runs on a 2s 200mah 25c Lipo and is supplied as a BnF. Performance is great for this little aircraft and it feels steady and stable in the air. It comes with wheels fitted (along with a steerable nose leg), but these can easily be removed to reduce the drag.

I’ll upload some flying shots soon, here are some static images.

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Eflite UMX SBach 342

 E-Flite, Horizon Hobby UK  Comments Off on Eflite UMX SBach 342
Jun 072011
 

The newest offering from Eflite in the Ultra Micro Series (UMX) is the Sbach 342. This uses similar equipment to the already proven UMX Beast.

The newest offering from Eflite in the Ultra Micro Series (UMX) is the Sbach 342. This uses similar equipment to the already proven UMX Beast.

I received a pre production sample from Horizon Hobby UK to test, i’ll go through it step by step working from the box to the air.

Eflite’s Product Specifications
Wingspan: 17.0 in (432mm)
Overall Length: 16.6 in (422mm)
Wing Area: 65 sq in (4.2 sq dm)
Flying Weight: 1.95 oz (55g) without battery
Motor Size: 180-size 2500Kv brushless outrunner
Radio: 4-channel with expo and dual rates
Servos: Four (4) S2000L long-throw servos (installed)
Trim Scheme Colors: Red, white, and black
Wing Loading: 4.2 oz/sq ft
Prop Size: 5 x 2.75
Recommended Battery: 2S 7.4V 180mAh Li-Po (included)
Flaps: No
Retracts: No
Approx. Flying Duration: 6 minutes
Charger: DC powered 2S LiPo charger (included)
Steering: Yes
Minimum Age Recommendation: 14 years
Experience Level: Intermediate
Recommended Environment: Outdoor
Assembly Time: Less than 1 Hour
Is Assembly Required: No

As with all Eflite’s products, a colourful and informative box protects the product within.

A well thought out layout, means that there is no damage during shipping. I always keep the box, its the best protection long term for the model. Also in the box, is a 2cell changer, 2 cell 180mah lipo, instructions & 2 sets of SFG’s.

Working from the nose back, this is what we have. A neat removable magnetic battery hatch in the cowl area, encloses the battery and small brushless motor. A Z foam spinner is also a nice touch.

The motor is similar to the one used in the UMX Beast, but with a slightly higher 2500 Kv rating, it turns a 5 x 2.75 prop

Behind the cowl/hatch, it a removable canopy, this allows access to the Receiver/ESC & Servos. It is simple held in place with some tabs and clear sellotape. You really shouldn’t require to be in this area, but I couldn’t resist a look.

A close up of the Electronics. Unlike pevious UMX’s the SBach doesn’t utilize a combined RX/ESC & 2 linear servos, it has ports so we can plug servos into it, more like a conventional rx. The linear servos we can see are for the Rudder & Elevator, the RX forword of this. The built in ESC is capable of drawings 3 amp.

 

The elevator & rudder carbon control rods are supported midway along their length, to prevent them from deflecting in flight and in term the throw being reduced. This is a simple tip for anyone building an indoor to smaller electric model and using carbon rod, a few supports make a world of difference.

At the rear, we have a steerable tail wheel and large control surfaces. A carbon spar on the elevator/stab keeps it rigid in flight.

Eflite supply two sets of depron SFG, if you wish to use them, this will help with Knife Edge performance, I opted on Mike McConville’s advice to use the largest SFGs from the start.

My method of fixing was some Uhupor, it’s light and flexible, so if you knock them, your unlikely to damage them.

The wings have a pre installed groove, I’d say the SFGs would actually stay in place without any adhesive as they are a tight fit on the groove, but I’ll secure them none the less from the start.

The smallest amount of UHU on the underside, holds them secure.

The model complete with SFG’s from the top, I love the scheme, something different

Underneathm you can see the dual aileron servos and spats, in this view you maybe able to see the elevator carbon spar, just aft of the hinge line.

It’s ready to go, fingers crossed for a calm night to test.

Matthew