Scratch built Burrito
 

I've posted this also at the ProBro forum, but maybe you're interested also...

I'm currently building a Burrito completely from scratch. I'm using a 9mm diameter carbon tail-boom. So I'd had to make some improvements because the original tail-boom is 12mm. Setup I'd had in mind: Magnum XL52 + 12.25x3.75w. I will post some photo's while making progress. :)

http://www.rc-cropduster.com/users/j...burrito_01.jpg

http://www.rc-cropduster.com/users/j...burrito_02.jpg

http://www.rc-cropduster.com/users/j...burrito_03.jpg

http://www.rc-cropduster.com/users/j...burrito_04.jpg

http://www.rc-cropduster.com/users/j...burrito_05.jpg

http://www.rc-cropduster.com/users/j...burrito_06.jpg

http://www.rc-cropduster.com/users/j...burrito_07.jpg

RE: Scratch built Burrito
 

Thnx! :) I'm not building very pretty right now. Still looking good though, but this project needs to be finished ASAP. ;) Wing is as good as finished. Shearwebs and servo-hatch need to be added later on. First I'll go further with the fuselage.

http://www.rc-cropduster.com/users/j...burrito_08.jpg

http://www.rc-cropduster.com/users/j...burrito_09.jpg

Keep you posted. ;)

RE: Scratch built Burrito
 

The fuse:

http://www.rc-cropduster.com/users/j...burrito_10.jpg

RE: Scratch built Burrito
 

Tonight I'd finished the fuse more or less. Joined the parts together. They align pretty nice for first fitting.

http://www.rc-cropduster.com/users/j...burrito_11.jpg

http://www.rc-cropduster.com/users/j...burrito_12.jpg

RE: Scratch built Burrito
 

I've modified the rudder a little bit. My Diamant No-Limit 3D has the same idea. It makes the rudder very stiff, what always is welcome for some knife edge or whatever. ;)

http://www.rc-cropduster.com/users/j...burrito_13.jpg

RE: Scratch built Burrito
 

Small update of tonight's building. I'll continue tomorrow (it's 11:25 PM - GMT +1)
http://www.rc-cropduster.com/users/j...burrito_14.jpg

RE: Scratch built Burrito
 

I'd do some balancing. The stats:

Rudder - 12gr.
Stab. - 15gr.
Elevator - 14gr.
Motor mount + carbon* - 110gr.
Fuse - 64gr.
Wing - 178gr.

Total weight: 393 gram (13.9 oz) w/o ailerons.

Magnum 52XL - 392gr.
Muffler - 110gr.
4x S3001/S3003 - 150gr.

Total: 1045 gram. (36,9 oz)

The weight/performance ratio is getting very interesting! My all in weight should be around 1500-1800 grams (53-64oz) I suppose. And that with something about 3kg (105 oz-f) thrust from a 12.25x3.75w prop. Awesome! 8) Power to weight ratio of almost 2:1...

*The carbon is getting shortened, providing a weight reducing of an extra 10 to 20 grams.

RE: Scratch built Burrito
 

Some ingredients you need to build a Burrito... ;)

http://www.rc-cropduster.com/users/j...burrito_15.jpg

...now the sanding begins... :x

RE: Scratch built Burrito
 

All the things I need to complete this project. :)

http://www.rc-cropduster.com/users/j...burrito_16.jpg

RE: Scratch built Burrito
 

My last pictures before I begin with covering:

http://www.rc-cropduster.com/users/j...burrito_17.jpg

http://www.rc-cropduster.com/users/j...burrito_18.jpg

http://www.rc-cropduster.com/users/j...burrito_19.jpg

http://www.rc-cropduster.com/users/j...burrito_20.jpg

http://www.rc-cropduster.com/users/j...burrito_21.jpg

http://www.rc-cropduster.com/users/j...burrito_22.jpg

RE: Scratch built Burrito
 

Did make some progress with covering.

http://www.rc-cropduster.com/users/j...burrito_23.jpg

RE: Scratch built Burrito
 

Some overall impression pictures... Still not finished covering completely.

http://www.rc-cropduster.com/users/j...burrito_24.jpg

http://www.rc-cropduster.com/users/j...burrito_25.jpg

http://www.rc-cropduster.com/users/j...burrito_26.jpg

RE: Scratch built Burrito
 

http://www.rc-cropduster.com/users/j...burrito_27.jpg

RE: Scratch built Burrito
 

I've bent the landing gear at today. It's made of spring-iron (how do you call that? :)). I'd use a bending machine at school because it's very though material. I'm quite satisfied with the result, it's completely symmetrical!

http://www.rc-cropduster.com/users/j...burrito_28.jpg

http://www.rc-cropduster.com/users/j...burrito_29.jpg

http://www.rc-cropduster.com/users/j...burrito_30.jpg

http://www.rc-cropduster.com/users/j...burrito_31.jpg

RE: Scratch built Burrito
 

I'd glue the whole Burrito together with some Epoxy tonight.

Overview
http://www.rc-cropduster.com/users/j...burrito_33.jpg

Servos are build in.
http://www.rc-cropduster.com/users/j...burrito_34.jpg

Stabilizer aligns pretty nice with the wing.
http://www.rc-cropduster.com/users/j...burrito_35.jpg

RE: Scratch built Burrito
 

Yeah, Burrito sure does kick ass! 8) I'd take it to our field for the first time today. Did some CG and range checks (new receiver) and that worked out well. So I taxied to the landingstrip and gave gas. It took off straight, no trim was necessary. So the fun could begin. Starting with some torque-rolling, rolling circles, knife-edge cubans, and stuff like that. The Burrito hasn't got any strange rudder-couplings. :) I'm very satisfied with the result! Vertical performance is just sick. What a acceleration, unlimited vertical into the clouds! Just great! It hovers at 25% or less. I use a Magnum .52XL with 12.25x3.75w by the way.

Some photos a club-member took today:

http://www.rc-cropduster.com/users/j...burrito_36.jpg

http://www.rc-cropduster.com/users/j...burrito_37.jpg

http://www.rc-cropduster.com/users/j...burrito_38.jpg

http://www.rc-cropduster.com/users/j...burrito_39.jpg

http://www.rc-cropduster.com/users/j...burrito_40.jpg

RE: Scratch built Burrito
 

My Burrito is still going strong. It's becoming a hype in the Netherlands and Belgium since I've posted my scratch-building report on the biggest RC forum in the Benelux, Modelbouwforum.nl Real nice! So there should be a lot more in a couple of months.

First hovers and torque rolls at eye height were made tonight. Even rolling harriers, knife-edge spins, knife-edge loops and blenders! 8) My Burrito is 3.7lbs by the way, given was 4.0-4.5lbs straight out of the box. What's the weight of your Burrito? ...just comparing some specs... ;)



I'd take some other pictures of my Burrito. :) This time with my own, higher resolution camera instead of a club-members cam.

http://www.rc-cropduster.com/users/j...burrito_43.jpg

http://www.rc-cropduster.com/users/j...burrito_44.jpg

http://www.rc-cropduster.com/users/j...burrito_45.jpg

http://www.rc-cropduster.com/users/j...burrito_46.jpg

http://www.rc-cropduster.com/users/j...burrito_47.jpg

http://www.rc-cropduster.com/users/j...burrito_48.jpg

http://www.rc-cropduster.com/users/j...burrito_49.jpg

http://www.rc-cropduster.com/users/j...burrito_50.jpg

http://www.rc-cropduster.com/users/j...burrito_51.jpg

RE: Scratch built Burrito
 

Today I've programmed a Elevator-Flap mix on a switch of my T9-CHP (FF9). The Burrito is now able to make 90° turns much easier than before. Ideal to start with a torque-roll at a couple feet from the ground. Only thing is that the ailerons are not responding the way you were used to. Nevertheless a quite cool feature, witch is worth trying. :)


Up
http://www.rc-cropduster.com/users/j...burrito_52.jpg

Down
http://www.rc-cropduster.com/users/j...burrito_53.jpg

The settings I use
http://www.rc-cropduster.com/users/j...burrito_54.jpg

RE: Scratch built Burrito
 

First in-flight pics were made today by a club member. :)

http://www.rc-cropduster.com/users/j...burrito_55.jpg

http://www.rc-cropduster.com/users/j...burrito_56.jpg

http://www.rc-cropduster.com/users/j...burrito_57.jpg

http://www.rc-cropduster.com/users/j...burrito_58.jpg

http://www.rc-cropduster.com/users/j...burrito_59.jpg

http://www.rc-cropduster.com/users/j...burrito_60.jpg


Inverted low pass at 2 ft. following with the begin of a torque-roll at 8 ft. did result in a engine failure. :? The Burrito did a stall-turn and planted the model on his nose on the ground. Result: A broken propeller. Big deal. ;)

http://www.rc-cropduster.com/users/j...burrito_61.jpg

RE: Scratch built Burrito
 

That's it folks! ;)

Let me know what you think of it!

RE: Scratch built Burrito
 

Great build jorrit, i followed it on the Profile brotherhood. Very clean build and a great flying site! I only have the wing to finish today and then my burrito is ready for covering.

Have fun with it

Owen

RE: Scratch built Burrito
 

Nice JOB! Very good photos. Plane looks COOLLLLLL ;).

RE: Scratch built Burrito
 

Nice job!

RE: Scratch built Burrito
 

Did you use a laser cutter? The cuts on the balsa ribs and ply looked so clean! Great job man

RE: Scratch built Burrito
 

Thnx everyone!

@ Funflyaddict - Thanks! :) Nice! Another Burrito! What colorscheme are you going to use?

@ srg123cohen - Nope, I've used a couple of templates to cut and grind my ribs into shape. I have the principle on photo from my Diamant project. I wish I had access to a Laser cutter, or CNC-mill. Maybe I'm going to build one some other time. You've got small kits with 2/4-step electrical engines. A little DIY and a Dremel and you've got a simple CNC.


Some examples:
http://members.chello.nl/j.meijer2/i...diamant_02.jpg
http://members.chello.nl/j.meijer2/i...diamant_03.jpg



Today I did add a extra landing gear to my Burrito. It's just for fun and not permanent. This is so ugly! But it would be fun, landing upside down.

http://www.rc-cropduster.com/users/j...burrito_62.jpg