Extreme Flight Extra 300, 88.5" with Plettenberg Terminator

[mihah]

Hello,

after I saw Benoit successful conversion of electric powered 88" Yak (see RCGroups) and Chris put the news of the 88.5" Extra, I knew I have to have it!

I was very excited about the fact, that the CG is spot on (!) and I decided to go ahead and show my work.

When I got plane in my house on 12th December ... I felt like it was xmas that day!



My setup:

Plettenberg Terminator 30/8 with special Plettenberg spinner and folding prop RASA 24/12 and 25/12
Schulze Future 32.170W (up to 11S Lipo only )
For start only 10S F3A Evolite 5350 mAh
4 x JR 8711 servos


Some of you might be interested:

Undercarriage, aluminium 266 g
Wheel pants, both, 78 g
Graupner light 100 mm wheels, both, 98 g
Pilot X, 87 h
Undercarriage endings, both, 16 g
Black tubing, 6 g
Carbon tailwheel assembly, 30 g
All accessories still in the bags, 153 g
Instrument panel, 31 g
Undercarriage closing piece, 19 g (še nekaj bo šlo stran)
Elevator, right , 133 g
Elevator, left, 130 g
Rudder, 113 g
Stab tube, 14 g
Right wing panel, 616 g
Left wing panel, 611 g
Wing tube, 133 g
Canopy, 400 g
Cowl, 227 g
Fuselage, 1709 g

_________________

Complete 4870 g. I didn't weighted the depron panels.


Here are some key photos. More can be found here


I couldn't see "poor finish" on the spinner, so I spent 3 hours polishing it



Still not finished elevator servo, but you get the idea:





Motor mount, extremely sturdy, 68 g + 70 g for the plate. All the dremeling saved approx 20 g (could be more or maybe even less...)



Rudder action is crazy fast. I added small support below the servo mount.



Joined tunel to the main plate on crucial places for more sturdy construction



Cells can be secured with a pair of straps (only the front one shown)

[mihah]

For freestyle flying my best bet will be some very powerful 5000-6000 mAh 11S1P pack with RASA 25/12 (actually 25.59 inch diameter!). Extra can take such big prop.





It is quite hard to see on the photo, but the prop is really big, I expect the rudder to be very effective

[mihah]

There are very little detailed photos of the Plettenberg Terminator motors, so here is what you get out of the box:

Motor 1023 g, this is 103 g more what Plettenberg says
Spiner 102.9 g
24/12 42.50 g + 42.90 g = 85.40 g
25/12 39.45 g + 39.25 g = 78.70 g



















Rasa 24/12





From instructions:

[mihah]

New Years Eve - 10 hours in my workshop.

Here are the results:











242 g 8)

Better be safe than sorry, 63V, 2200 uF , 105°C, low ESR capacitor. I love Kapton



There is few more degrees more to squeeze out










Cables will be shortened. I need to modify the canopy tough... more weight savings

[mihah]

Chinese BEC will go through rigorous ground testing before I let it fly in the model! :P



Was this model made for electric power? Just a joke




CG is 6" from LE with this position of the cells:

[mihah]

Some "closing" operations today. Quite some time consuming work.

Depron pieces were used because the front of the model is closed due to the cooling.
I left opened motor mount and servo opening and limited the tunnel intake. I wanted as much possible air to be removed from the cells via the tunnel. I think this should work quite well.

[mihah]

Needed canopy modification

[mihah]

I didn't published these yet..

Scale touch



Here is how I modified the pilot and mounted it on the canopy. Now I can do wild 3D manouvers and pilot will stay in place

I shaved some weight off the Pilot and it came to 84.9 g with pylwood pieces. Pilot was attached with screws from below.





With UHU POR

[TRuss]

So nice. I look forward to the flight reports. If you post a video, leave out the music. I want to hear that Terminator.

[dubd]

Nice build thread! I can not wait for the video!!! Make sure you record it as it might push me over to converting mine to electric.

[KenDobson]

we need more updates, 24 inch prop yeah baby it should rip!

[KenDobson]

did this project get finished?????

[mihah]

Hello to all

Sorry for not doing any update.

Yesterday it was the D-day!

Maiden was really easy. My setup was 10S Evolite 5350 F3A and 25x12 prop. I think it is quite good power, but due to the wind picking up I was unable to test Evo 30 4500 11S (6S+5S) pack.

Model is flying GREAT, also the sound from the prop somehow surprised me

Album Krst


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[Simpleton]

Glad to hear the maiden went well!

[MarkF]

Wow Miha, youv'e come a long way from running saw boats in LA. And I see you haven't wasted any of your old boat stickers either on some of your other planes. Congratulations.

Mark Ferreira