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Giant 1:4,5 scale Heinkel He-162 A2 RC jet model

3D model description

1:4,5 scale model of the Heinkel He-162.

Length: 1996 mm (without pitot tube)
Wingspan: 1580 mm
Flying weight: 7,5 kg
Power: ~4000 W

Minimum printer size for the biggest parts: 280x280x300 mm
Many parts will print on smaller 200x200x180

CG: 83 mm - Should be slightly forward with gear down and slightly aft with gear up
Elevator throw: 20 mm up and down
Aileron throw: 20 mm up and down
Rudder throw: 12 mm left and right

Prototype videos:
https://youtu.be/EDEhikNloU8
https://youtu.be/c0MWYCIPg6g
(Note that the prototype did not have reinforced landing gear like the files here. I'm reprinting with the reinforcements)
Final version video with reinforced undercarriage:
https://www.youtube.com/watch?v=bHlbqoq0Mpk

Very good stall characteristics and gentle handling in flight. The prototype had a top speed of 228 km/h with the 3D printed EDF. There is no bad handling because of the high thrust line because it is compensated for in the design.

The EDF intake is larger than scale for more airflow to the 120 mm EDF. The turbine intake is closer to scale size. I have no intention of trying turbines myself but There is room in the fuselage for all kinds of tanks. I can design a turbine nacelle if there is a need for one with a larger internal cavity than the duct.

I added a separate Exhaust piece for small turbines for those that want to try that. Exhaust02-turbine has 6,6mm slots in the sides for glueing in 6 mm or 1/4" plywood mounting rails for turbines like Kingtech K45 at the proper angle (2° down thrust). The top of the plywood rails will be the center of the duct.

Warning, skills like basic metalwork and brazing (silver soldering) is required to finish this model, as well as general model setup know-how. Don't buy this if you don't know how to do DIY stuff like that, or are not willing to figure it out.


Landing gear parts:
Uses retract actuators from JP to retract the landing gear which is integrated: http://www.hobby-china.com/control-box-v2-for-gear-operation-jp-hobby.html
http://www.hobby-china.com/motor-parts-for-jp-aer-7-3-jp-hobby-alloy-electric-retracts-for-7-8-kg.html
2x 130 mm shocks: https://www.banggood.com/4PC-180007-130MM-Aluminum-Alloy-Front-Rear-Shock-Absorber-For-HSP-Rc-Car-Climbing-Rock-Crawler-p-1305169.html?ID=232&cur_warehouse=CN
2x 1,4x10x50 mm springs for the main gear: https://www.ebay.com/itm/1-4mm-WD-9mm-OD-Stainless-Steel-Compression-Spring-Compressed-Pressure-Springs/272632001985
0,8x9x60 mm tension spring for the nose gear (I made mine from spring stock)
M5 threaded rod stock and M5 nuts to make actuator lead screws from
Williams Bros 5-1/4 tires can be used instead of the printed tires. Ask WB to sell tires only to avoid having to remove the hub: http://www.wmbros.com/store/p53/Smooth_Balloon-II%2C_5-1%2F4%22_Diameter%2C_1_Pair.html
Dubro smooth 3-1/4" nose wheel:
https://www.ebay.com/itm/372109961103
4x 47ODx3,5 mm O-rings for the brakes: https://www.ebay.com/itm/253621698783

Requires the following carbon fiber tubes and rods:
1x 16x14x770 mm tube for the wings
2x 16x14x84 mm tubes for the lower main gear struts
2x 18x16x157 mm tubes for the upper main gear struts
1x 8x6x300 mm tube for the wings
1x 8x6x167 mm tube for the nose gear strut
1x 6x4x900 mm tube for elevator control
Various lengths of 6 mm tube or rod for strengthening the landing gear mount area
Various lengths of 3mm and 4 mm carbon fiber rod for hinging and reinforcement

Screws:
Various M3 screws and nuts from 8 mm length to 40 mm length
Various M2 screws from 10 to 20 mm length
M3x5 and 12 mm grub screws
M6x80 mm screws for the main gear strut mounts
M6x50 mm hex head bolts for the main wheels

Ball bearings:
12x 6x15x5 mm for the main gear and elevators
4x 4x11x4 mm for the nose gear

Servos:
3x JX DHV56MG for the nose steering and wheel brakes: https://www.banggood.com/4PCS-JX-Servo-DHV56MG-5_6g-DS-Digital-Coreless-MG-Metal-Gear-HV-Servo-1_2kg-0_10sec-For-RC-Airplane-p-1430838.html?cur_warehouse=CN7x Corona CS-238MG (or similar size servo with 4+ kgf/cm torque) for all control surfaces. Flaps and elevator can use standard servos instead: https://www.banggood.com/Corona-CS238MG-Thin-Metal-Wing-Analog-Servo-p-1049129.html
1x "9g" servo for the nose gear door

Power for the printable EDF unit:
2x 6S 5000 mAh lipos (Gens Ace 45C recommended)
Castle Creations Talon HV 120 ESC
Het 800-73-590kv motor with heatsink:https://www.turbines-rc.com/en/50-56mm-brushless-motors/285-typhoon-het-edf-800-73-motor-50mm-590kv.html
https://www.turbines-rc.com/en/heat-sink/1075-heat-sink-75mm-for-50mm-motor-and-ejets-jetfan-120-edf.html

The stand uses a 16x585 mm tube as the center member. I used locally sourced aluminum tubing. The stand is supposed to support the plane immediately aft of the gear wells and at the joint between Fuselage02 and Fuselage03.

More info will come....

3D printing settings

PLA is fine for all parts. Your mileage may vary due to temperature requirement and personal preference.

As a weight reference, my Fuselage02 weighs 151 g after the two support pieces are removed.

Open the factory file to see recommended print settings for the main parts.

Wings, tail and fuselage main parts should be printed with 0,3 mm wall thickness and single perimeter only. I recommend 0,12 mm layer height. Thicker print width is not recommended due to weight and balance, but 0,4 mm is possible.

Main landing gear and nose landing gear parts should be printed with four perimeters and 10% infill and 0,12 mm layer height. The same goes for links and other small critical parts.

EDF impeller and housing should be printed with 6 top and bottom layers and 7 perimeters.

  • 3D model format: STL and ZIP

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9 comments

I added another exhaust cone now with 6,6 mm slots in the sides inside where plywood can be glued in for mounting a small turbine at the right angle. The top surface of the slots is the centerline. Hope it helps.

I think it's possible. You'd need to mount it in the exhaust cone and point it up 2°, like the internal ducting is. This would require a lot of nose weight but the plane can handle another kg of weight without problem. Alternatively you cuold mount the turbine up front and use an exhaust tube with a 2° up bend at the rear end to compensate for the high thrust line. There is huge room for a fuel tank inside the fuselage at the CG location.

I have no experience with turbines personally. I can design a new exhaust cone with mounting points for the Kingtech. It should probably be printed from ABS to withstand the radiated heat after a flight.

Hello
I woluld like to install a Turbine Kingtech K45. ¿Do yo think it will be posible?
Thanks.

I just purchased the files. Not sure if I will ever print it, but at least to appreciate your amazing work.
Thanks for everything!

Im thinking more like a thin metal ring on the outside on the plastic seats for the bearings (on the knuckle ends L/R). Hard to put in words but i think you get what I mean. It might just shift the breakage somewhere else but atleast the bearing wouldnt eat the selves out of the plastic.

I could mill a some piecs and redesign the files for a try.

That's great to hear. Thanks for the feedback. I think you're the first. Maybe one layer of fiberglass around the "knuckle" of the leg would be enough to prevent this in the future.

Hi all

I did my maiden on the salamander this weekend and its a rare bird for sure.
Takeoffs very nicely and has a very lazy flight pattern. Slowflight is veeeeery good. I accidently stalled it in a climbing turn and it doesnt snap it just points nose down and gathers speed again. Its flies very nicely gear up and its quite quick. Gear down adds a lot of drag which is nice for landing, i didnt even use the flaps.

I did find it being very much like my high wing trainer many years ago - in many ways. In my opinion it catches the wing like a high wing plane so a bit sensitive in cross winds. But kinda looks like a midwing...
But dont get my wrong its very stable. Its looks funny in the air. I flow mine on a Jetfan with the HET 590kv motor. It flies really nice on just half trottle.
I flew 3:30 and was at 3,84volts on landing with 5000mah batteries.

On landing i put it down way to fast and early so it bounced on me and i broke a leg like LYNXs video. However the reinforcments he made really works, what broke on mine was the legs top part, the bearing seats. What happens is that the design of the legs, the stance is wide so it put outward forces on the strutends/mounts when coming down a bit hard. But it was a really hard bounce with a 8kg heavy plane so with that in mind it actually took a beating very nicely.
I will reprint the leg.

So if you are looking at this rare bird give it a go. Its a very good design and it does fly really well but it dont think this is the model you take out in heavier crosswinds. Great job of the designer fixing what the germans never had time to do :)

OHH the breaks are great !!
Now Ive printed my first EL39 and started my second one :) Love the designs.
All the best
Peter


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