Register

Product Finder

Settings

Useful links

 
[["US","AU","GB","DE"]]
Register
Shipped From:
  • Global
  • USA

Sigma 2 Meter Electric Sailplane ALES (ARF)

Sigma 2 Meter Electric Sailplane ALES (ARF)

QTY:

Now save save $95.31 $95.31

Special Price $229.99 $229.99

You save save $95.31 $95.31

Was  $325.30

Rating:
Stock:
Weight:
1190 g
SKU:
9339000013-0

Suggestion Box

Please let us know if you found any issues with this product listing.
We take our customer comments very seriously and in many cases our website modifications and product updates are a result of your comments!

Price War

If you've seen a product elsewhere for a better price, please let us know! HobbyKing pride themselves on offering the best price, so if there if you see something cheaper elsewhere, let us know!

Product
Description

The Sigma is 2meter lightweight electric thermal soarer designed to be competitive in small outrunner electric glider classes. Full-house controls (rudder, elevator, ailerons and motor) allow for precise control and the Mark Drela designed AG series airfoil sections give the Sigma a class-leading performance.

By incorporating many of the innovations developed for discus launched gliders (DLG) the Sigma is capable of outstanding performance and is perfect for searching out and making the most of small pockets of lift as well as those booming thermals. The model is very suitable for the popular 200W/kg and ALES class of soaring as well as the internationally accredited F5J class.

As with any sailplane, the heart of the model is the wing and this is taken straight from the DLG school of thought to give an immensely strong wing with maximum efficiency and minimal drag. Extruded foam cores are fitted with carbon fiber top and bottom spars, carbon leading and trailing edges before being vacuum bagged into Kevlar/Carbon cloth skins laid on a 45° bias for maximum torsional rigidity.

For lightness and rigidity, the tail surfaces of the Sigma are made from a Rohacell foam core laminated between glass cloth skins. Both the upright and horizontal surfaces incorporate carbon fiber spars for strength and feature kevlar tape hinges for a fully sealed surface.

The Kevlar aramid cloth fuselage pod is reinforced with longitudinal carbon spars and has a carbon molded canopy for easy access.

Building the model is quick and straightforward thanks to the comprehensive manual and will result in a sailplane to compete with the best!

Features:
• Lightweight construction
• Fully composite construction
• Vacuum bagged wings
• Drela airfoils
• Quick to build
• Mark Drela designed AG series airfoil sections

Specs:
Wingspan: 2000mm
Length: 1130mm
Wing area: 30.5dm sq
Wing section: AG 35-36-37
Flying weight: 600~620g
Wing loading: 19.7g/dm sq
Suggested motor: 2212 1000kv

Required:
4 x 9g Metal Servos (Aileron cut-out L24xW11xH33) (Rud-Ele W24xL12) 
2212 1000kv outrunner motor
34mm spinner
Folding prop (size to match chosen motor - 9~12")
25A ESC w/BEC
800~1200 2/3s LiPoly battery
Transmitter/receiver
Adhesives

Product
Specifications

Additional Information

  • SKU:
    9339000013-0
  • Brand:
    No
  • Weight(g)
    1190.00
  • Length
    1180.00
  • Width:
    110.00
  • Height:
    280.00
Community
Discussions
Rate&
Review

Write Your Own Review

Only registered users can write reviews. Please, sign in or sign up

Overall
Value
Quality
The instructions are not "step by step", but assembling the airframe will not present any problems for those that have completed something like it before. I mounted a Turnigy 2830/10 1000Kv motor on my own fire wall (that supplied is too soft), around 12mm back into the fus (rear mounted motor). This allows extra space inside the fus to be fully utilized (no rotating motor in there). The motor sticks out bit and now has a cowl fitted to fill the gap. A 30A esc and NanoTec 850, 3s, 45C fit into the front of the fus with room to spare to move the battery forwards or backwards, to try different CoG locations. At around 60mm back from the LE (without extra weights needed to balance), the CoG is good to start.
The power from the setup with a 10x6 folding prop is more than enough to gain the start height for competition within 30s. Mine weighs 610g ready to fly. Despite the large dihedral, the ailerons have good authority and smooth rudder only turns can be made. Using the ailerons also as spoilerons gives impressive speed loss whilst maintaining full control.
I'm very pleased with it, and hope to get to use it in thermal Esoaring comps, where it might do well in the right hands.
Overall
Value
Quality
Value
Quality
Overall
Bought this as a second model to try out F5J competition. Sizes over 2m are "open" class up to 4m, in which many of the big composite sailplanes cost well over £1K. Bought this at the reduced price of around £175, I was quite impressed by the quality of the kit. Very strong wings, straight with sharp trailing edges. The fus pod and boom is pretty light stuff, maybe not for general sport flying where rougher landings might be involved. The helpful joining jig (shown as if it is part of the finished airframe...must have put a few off) needs a few nuts and bolts to hold together. Don't forget to give the inside of the jig halves a good coating with furniture polish to release the epoxy. I'd had a it for a few weeks prior to starting the build. Having seen the parts of the kit and seeing how easy it could be to add flaps to it...I ordered another. I'll add to this after it has flown. At today's price in the UK ~£175, it's a screaming bargain....
Value
Quality
Overall
Value
Quality
Overall
This is a preliminary pre-build review. I will post an update later. / Overall quality is good. The wings have no visible warp and the Kevlar/Carbon skins are tight and smooth. The molded fiberglass fuselage is smooth and has no warps or twist. / A rudimentary manual is provided, printed in color on good quality paper, but is leaves much to be desired as to completeness and clarity. A downloadable copy can be found under the Files tab on the web site catalog page. / The wing is in two parts which are to be joined by a heavy two-part plastic saddle. The two halves have holes in the leading and trailing edges that appear to be intended for joining them but no bolts are provided. The instructions say that the wing saddle should be glued. The assembled wing is attached to the fuselage with two bolts. Large outboard ailerons are cut and hinged. Servo wire tubes in the wings are too small for standard connectors, and there is no exit port at the inboard end where the wing halves butt. Servo covers are provided. / Vertical and and horizontal stabilizers are fully assembled with hinged control surfaces.. / A plywood servo tray is provided for the rudder and elevator servos. The cutouts measure 12 by 24 mm. Push-rod wire is provided but must be cut and formed by the builder. There are no ports to allow push-rods to exit the fuselage so those will have to be cut by hand.
Value
Quality
Overall
Value
Quality
Overall
His is preliminary pre-build review. I will post an update after completing the build and flight test. // Overall quality is good. The wings have no visible warp and the Kevlar/Carbon skins are tight and smooth. The molded fiberglass fuselage is smooth and has no warps or twist. / A rudimentary manual is provided, printed in color on good quality paper, but is leaves much to be desired as to completeness and clarity. A downloadable copy can be found under the Files tab on the web site catalog page. / The wing is in two parts which are to be joined by a heavy two-part plastic saddle. The two halves have holes in the leading and trailing edges that appear to be intended for joining them but no bolts are provided. The instructions say that the wing saddle should be glued. The assembled wing is attached to the fuselage with two bolts. Large outboard ailerons are cut and hinged. Servo wire tubes in the wings are too small for standard connectors, and there is no exit port at the inboard end where the wing halves butt. Poor design. / Vertical and and horizontal stabilizers are fully assembled with hinged control surfaces.. / A plywood servo tray is provided for the rudder and elevator servos. The cutouts measure 12 by 24 mm. Pushrod wire is provided but must be cut and formed by the builder. There are no ports to allow pushrods to exit the fuselage so those will have to be cut by hand. Oddly there are two port window parts but no indication in the instructions on how to install them and they seem too large.
Value
Quality
Overall
Upload
Videos
Upload video
Upload
Files

Only registered users can upload files. Please log in or register to start helping your fellow hobbyists today!

Customer files
Manual download now [875kb]

Product Tags

Use spaces to separate tags. Use single quotes (') for phrases.