Hangar 9 Inverza 62

 Building, Hangar 9, Horizon Hobby UK, Spektrum  Comments Off on Hangar 9 Inverza 62
Jul 132014
 

The Inverza 62 is the third scale model to come from Horizon Hobby which replicants Kevin Kimball’s concept design that we know as the Inverza. Eflite first produced the Inverza 280 mini sized, which proved hugely popular, then came the Inverza 33, this was a 33cc version or 10cell electric and finally we have the Inverza 62 for 60cc or 12cell electric.

We have fitted this Inverza with a DA50, ES composite pipe, spektrum A6260 Hv servos, spektrum 9 ch receiver, single 2s 2000 lipo and Optiguard for redundancy. Evolution have a new 62efi engine due for release very soon, so we will fit that once it’s available.

The inverza comes in 3 boxes and is double boxed for extra safety

The inverza comes in 3 boxes and is double boxed for extra safety

Once the shipping protection boxes are removed, the three internal boxes are identified with the inverza picture

Once the shipping protection boxes are removed, the three internal boxes are identified with the inverza picture

The contents of the 3 boxes, a very complete kit as you can see.

The contents of the 3 boxes, a very complete kit as you can see.

Spats are pre-drilled & captive nuts fitted, they bolt straight to U/C

Spats are pre-drilled & captive nuts fitted, they bolt straight to U/C

DA50 fitted, the block standoff's come with the kit. The header has a 25mm drop.

DA50 fitted, the block standoff’s come with the kit. The header has a 25mm drop.

DA50

The former had to be trimmed slightly to suit the pipe exit, we reinforced it above.

The former had to be trimmed slightly to suit the pipe exit, we reinforced it above.

The ES pipe is narrower in Diameter than an RE2 for example, so a slightly adjustment to preinstalled pipe support is required.

The ES pipe is narrower in Diameter than an RE2 for example, so a slightly adjustment to preinstalled pipe support is required.

Pipe fitted in Fuselage

Pipe fitted in Fuselage

Cowl Mounts attached

Cowl Mounts attached

Supplied Tank fitted & plumbed. The throttle servo we used in a Spektrum A6110 HV servo.

Supplied Tank fitted & plumbed. The throttle servo we used in a Spektrum A6110 HV servo.

DA50 ignition fiited, we used a Spektrum Regulator & 2s Lipo to power the ignition.

DA50 ignition fiited, we used a Spektrum Regulator & 2s Lipo to power the ignition.

underside view of DA50 and ES pipe, we elected to use a Jubliee clip between header/pipe.

underside view of DA50 and ES pipe, we elected to use a Jubliee clip between header/pipe.

The new Spektrum A6260 HV servo. The are super smooth and the metal case is very nice, will reduce that backlash you can get with plastic cases.

The new Spektrum A6260 HV servo. The are super smooth and the metal case is very nice, will reduce that backlash you can get with plastic cases.

The new Spektrum Servo connector, it makes installed very simple and this is a heavier duty option than the standard connection type.

The new Spektrum Servo connector, it makes installed very simple and this is a heavier duty option than the standard connection type.

Underside of Wing

Underside of Wing

Servo tray & horn pre-drilled and installed.

Servo tray & horn pre-drilled and installed.

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Test Flight

The test flight took place on a breezy evening at the flying field. After a quick pre-flight range test all was as expected and the new DA50 fired up with ease, about 10 flicks to get fuel into the carb, it fired, choke off a few flips and it was running. The ES pipe seems to be very quiet and the DA was running very smoothly.

Into the air the Inverza went, with a few clicks of trim it was soon flying straight and level, a quick CofG test and the Inverza CofG felt pretty good. We had placed the RX battery as far forward as we could, being conscious that the DA50 is a light engine, this proved about perfect. I tried a few basic aerobatic manoeuvres, point rolls were very nice, sharp and axial, snaps as seemed to be very positive and the exit sharp, it will make for a very nice IMAC aircraft I can feel that in the short flight I had. I was very conscious that the DA50 was new and not to push things too hard, I tired a few longer uplines and the piped 50 had ample power for most IMAC sequences, the airframe is light and there isn’t much drag, so it carries speed well even with a snap thrown in on the upline. I tried some very gently 3D, not wanting to load the engine, it feels very locked in, responsive & comfortable in 3D.

There is a lot of potential in this airframe, you can really appreciate that this aircraft has been designed from the ground up to be a good as it can be and the Quique Somenzini & Kevin Kimbal partnership has produced a beautifully balanced aircraft in precision & 3D.

I’m looking forward to flying it some more and fitting the new Evolution EFI 62 when it becomes available.

Thanks to Horizon Hobby UK for the opportunity to test. Here are some pics;

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Matthew

Hangar 9 Sukhoi 97″ Electric

 Building, E-Flite, Horizon Hobby UK, Newsflash  Comments Off on Hangar 9 Sukhoi 97″ Electric
Aug 132012
 

We recently test flew a new project for us. We have had great success with the Hangar 9 Sukhoi 97″ in the past, but decided to dip our feet into the world of bigger electric aircraft and this airframe was the perfect choice. 

The new SU26 SE was fitted with a 7kw Plettenberg Predator 25 motor which is the equalivant to a 80-90cc petrol engine. 

Using 4-No. Eflite 5 cell 5000mah Lipo batteries wired to be 10cell 10000mah (10s2p) it is able to turn a 27×13 inch prop. The packs are superb & are holding up well after many flights, still balancing easily & holding their power right throughout the flight.

The prop is unique in that there are two separate blades that fit to either side of the motor, they can flex ever so sligthly and this provides a deafly quiet setup, with no ripping propeller tips. 

The speed controller is a Schzule XL Future 40.161, capable of 170amp constant & close to 300amp bursts.

Here are the Plettenberg motor specs:

The Predator 25 close the gap between the Terminator and the Predator 30 and is developed for F3A-X Models or models with the same wight, means aerobatic-models with a span of about 2,3 m – 2,5 m. In the class F3A-X is the limit of the weight 10 kg. The motor is developed light as possible, the motorwight is 1275 g incl. the couplesystem for the folding-props.

You have to use the motor with a LiPo 10S and 8-10Ah. The efficiency of the motor is about 89% and the power is about 7KW.

The Predator 25 is just available in a spinnersystem with foldingprops 25-28”. The weight of the motor, controler, spinner, prop and lipo is about 4000 g. For the “normal” aerobatic the motor is good for models up to 12 kg

 

  The motor is built into the spinner with a large hole for cooling in the nose, this offers a very efficient setup & keeps temperatures to a minimum. Power is unlimited & I can complete a full unlimited IMAC routine & only using about 60% of the packs capacity.

You can see some pictures below.

Inverted Harrier

 Here is a video from a local fly-in.

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A big thanks to Plettenberg for supplying this beautifully engineered motor, it certainly looks to be the future in our increasingly noise aware society. Also thanks to Horizon Hobby for their airframe & lipo’s.

Thanks,

Matthew

Hangar 9 27% Extra 260

 Hangar 9, Horizon Hobby UK  Comments Off on Hangar 9 27% Extra 260
Mar 052012
 

This winter I have decided to experiment with slightly larger electric aircraft. The proven 27% Extra seemed like an ideal place to start. This decision was taken to meet the increasing need to quieten our larger aircraft and be proactive in keeping noise to a minimum at flying fields.

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Hangar 9 Description;

Key Features
Legal for both Giant-Scale and IMAC
Superior precision and 3D performance
Flies with a wide variety of engines, including lightweight 50cc gassers
Designed by world-class competitor Mike McConville
Lightweight balsa and plywood construction
Carbon-fiber main landing gear and tail wheel
Covered in genuine Hangar 9® UltraCote®
2-piece high wing and stabilizer
Overview
Able to fly smoothly with a wide variety of engines, including the lightweight 50cc gassers and Saito’s
FA-180 and FA-220 4-strokes, the Extra 260 is capable of superior precision and 3D action. It’s constructed from very lightweight balsa and plywood, guaranteeing higher performance and more fun. The attractive landing gear is constructed from durable carbon fiber, which is much lighter than aluminum, yet still provides plenty of strength for rough landings.
Designed by aerobatic ace Mike McConville for high-adrenaline fun, the Extra also offers sturdy-but-lightweight all-wood construction, carbon-fiber main landing gear and tail wheel, and a beautiful UltraCote® scheme—ingredients for a high-performance airplane certain to excite giant-scale pilots everywhere.

Product Specifications
Wingspan: 78 in (1981mm)
Overall Length: 72.25 in (1835mm)
Wing Area: 1134 sq in (73.2 sq dm)
Flying Weight: 11.5–15.5 lb (5.2–7.0 kg)
Engine Size: 1.20–2.20 2-stroke; 1.40–2.20 4-stroke; lightweight 50cc gas
Servos: 6 servos minimum
Trim Scheme Colors: White (HANU870), True Red (HANU866), Pearl Blue (HANU845)
Hardware Included: Yes
Scale: 27%

One thing you might notice from the above spec’s is that this extra was primarly designed around glow engines and DA’s 50cc petrol. I decided to fit an Eflite Power 160 motor to this airplane, with this motor a 85amp esc and 10s 5000mah battery setup (2x Eflite 30c 5s 5000mah lipo’s) gives performance similar to a 160 sized glow motor.

To install an electric motor rather than the Glow/Gas engine was a simple enough process. As shown below a standoff box was required to extent the motor from the main fire wall. The rest of the build was straight forward and exactly as you would expect from Hangar 9. I elected to use Spektrum A6030 servos on a controls, 20kg of torque is way overkill but I like these servos, precise and reliable. I used Spektrum’s new 10ch RX the AR10000 and a simple 6.6v Life Rx battery 1300mah from Dynamite, which i will charge every 2-3 flights. One 5min flight used 170mah from the pack so it’s well safe. I went this way to keep weight to a minimum.

Test Flight Pictures

27% extra260

Ready to go. We haven’t finally fitted the spinner just yet, I want to experiment with props before I finally cut/fit the spinner. At the moment I’m using a Wooden Master Airscrew 20×10 Scimitar prop, so far I’m impressed. Good speed & thrust, very quiet in the air with no ripping and the it’s only drawing about 70amp’s at full power.

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This a really nice sized aircraft, and the extra 260 is still one of my favourite designs.

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Low pass on a windy testflight. It was well above 20mph and was bitterly cold.

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High Alpha KE, CofG feels about right in the air and KE mixing is minimal.

27% extra260

I didn’t want to push it on the test flight, I limited it to 3mins.

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Down safely.

I had two test flights on the day, the first one was very sedate, 3mins of gentle aerobatics. I put about 1700mah into both packs after the first flight. All the components were cool after the first flight. I had the telemetry working and the temperature sensor hooked up to the ESC showed a maximum temperature of 21-deg, the outside temperature was around 4-deg. The second flight was on another set of batteries and this time I pushed it a little harder, flight was 4 1/2mins of harder aerobatics, longer uplines and a little 3D. In the 20mph wind the plane handled really smoothly and the power was ample in the conditions. Temperatures were about the same as the first flight, flight pack voltage showed a minimum of 32v, which is fine, Capacity wise, I put about 2250mah into both packs after this flight, so still well within the 5000mah for each pack, realistically I wouldn’t want to exceed 4000mah per pack at the most, that’ll keep them better for longer.

Some Photo’s of the Power 160 motor install are below.

27% extra260

Motor within the cowl

27% extra260

The standoff box, we also cut some lightening holes into the existing engine box and bulkheads, to save some weight. Remember this was designed to take the load/vibration of a DA50, with this motor no vibration we will have much less torizonal load.

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Another view of the lightening holes. Not the ESC mounted under the standoff box. This means air is directed onto it from a whole cut under the cowl.

27% extra260

The ESC RPM sensor, gives you realtime motor RPM. One neat feature is that if you using this on a helicoptor, you can identify your gear ratio and this will tell you your Head speed.

27% extra260

The temperature sensor on the side of the ESC, helpful to have.

27% extra260

The telemetry wiring, looks a little complicated, but its not, very simple when you lay it all out,

27% extra260

Main Flight packs telemetry pickup, display the flight pack voltage on the Tx or your Iphone via the new Spektrum STI module/app.

27% extra260

We made up a battery tray to make the fitting of the flight packs simple.

27% extra260

A Y lead to link the 2x 5s5000mah in series to give a 10s1p5000mah pack. We have used EC5 plugs, they are good for well over 120amp per connector on 10awg wire.

27% extra260

The battery tray sits on top of what was the tank tray. In the picture above it shows the angle you need to slide the tray in at. Two guide rails at the head of the battery, prevent the tray from moving up or down and side to side.

27% extra260

At the rear of the tray, a simple nylon screw holds the tray down and stop it from moving in any direction. To me this is a simple way to hold the batteries in place, velcro can be difficult to secure inside fuselages and can sometimes lead to accidental damage.

I’ll update you on how the Extra is going as I build up more knowledge and experience. From my two flights all things are positive and I think this could prove a popular and affordable solution to noise reduction.

Also look out for something a little bigger on the electric front in the coming months.

Matthew