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Posted by mperaltaoz | Oct 28, 2013 @ 12:28 AM | 9,263 Views
I wasn't very sure what to build next...
I was looking for something different, something I could take to the field and be sure no one else was going to have.

After going in circles for a while, my friend Mick came up with this idea: "Why don't you build a Horten Ho-229? It's a wing, a glider, and a jet with twin engines."

It looked like quite a challenge. I was dubious at the beginning, but then I found some plans for a big balsa version and soon realized I could build it in foam.
After a short while, I was totally sold on the idea.

I must confess, though... it's been the most challenging build I've ever done. But it's also been very rewarding.
Seeing that bird up in the air is quite a sight. It has a lot of presence, is very fast, it glides when cutting power... very interesting.

Here is the Build Log, and below you can find some videos and pictures.

Maiden flight:
Horton HO229 Maiden flight (6 min 42 sec)

Flight #3:
Horton HO229 Flight No3 (4 min 7 sec)
...Continue Reading
Posted by mperaltaoz | Oct 15, 2013 @ 10:34 PM | 8,213 Views
Now I'm getting serious about this...

Since I lost the DR1 Fokker to a spiral of death, and after finishing the F-15, I decided it was time to replace the Fokker with another WWI plane.
I've always liked the SE5a, so it was a no brainer which one to pick.

This time I decided to take more risks and go for something more challenging, so I downloaded plans for a balsa model and converted them to foam on the fly.
After analyzing the plans in detail, I realized the conversion was doable with some analysis and re-design during the build process.

So, I got my hands dirty again and built it.
It wasn't easy, but I'm very pleased with the end result.

Here is the Build Log in case you are interested (plans and build pictures are there).

Wingspan: 1100 mm
AUW: 950 g
Motor: D4023 850Kv
Prop: 12x6 (on 3S 2200 mAh) or 11x6 (on 4S 2200 mAh)
ESC: BlueSeries 40A

Here is a video and some pictures... (it was quite gusty so the landing wasn't great)
Mario's SE5a scratchbuild (4 min 50 sec)
...Continue Reading
Posted by mperaltaoz | Oct 14, 2013 @ 12:17 AM | 8,969 Views
My 3rd build was an F-15 Eagle, which I built based on Steve Shumate's plans.
I modified the plans to accommodate a 64 mm EDF instead of the original pusher used by Steve.
I had never flown an EDF jet before, so it was double challenge: build it and fly it!
Great experience. I've learnt a lot about EDFs and the plane flies great.

Here are some key modifications I made:
- Top section is attached with 6 screws that can be removed for easy access to all electronics.
- Landing gear with steerable nose wheel.
- EDF with thrust tube
- Both elevators controlled by a single central servo

I ran it originally on 3S but then upgraded it to 4S (a lot better). I've also cut cheater holes for better air intake and adjusted the thrust tube to 80% FSA of more speed.

Some pictures and videos below (sorry I don't have any more recent videos, but it flies a lot faster now).

Maiden flight (on 3S, underpowered):
Mario's F-15 Scratch build EDF - Maiden Flight (5 min 37 sec)

2nd flight (on 4S, much better):
Mario's scratch build F-15 4S Takeoff (1 min 27 sec)
...Continue Reading
Posted by mperaltaoz | Sep 18, 2013 @ 01:25 AM | 8,719 Views
A little bit after finishing the DR1 Fokker, I got very enthused with scratch builds and decided to keep building.
This time I built a J3 Cub following the plans from Electric Orange in the forums.
I got a bit braver this time and did some modifications to the plans:
- Replaced the cambered wing for a Clark-Y profile which I cut with my hotwire cutter using cardboard templates
- Added ailerons
- Modified the cockpit structure to put windows in place
- Replaced the stick with a firewall for the motor mount
- Added detachable landing gear
- Added some scale details like struts, panel lines, etc

Again, the material is HD foam from container boxes which I've cut in boards with my home-made hotwire cutter.
This one is still alive and it flies like a charm. It's got a HK 2830 1000 KV swinging a 9x6 prop which gives the plane a lot of oomph to fly in high winds and do all kind of aerobatics. It is my preferred plane to put up in the air when it's really windy.

Pictures below (sorry, no video)...Continue Reading
Posted by mperaltaoz | Sep 18, 2013 @ 12:21 AM | 8,638 Views
After flying RC planes for about 6 months, I realised that there should more to this hobby than simply buying RTFs and flying them.
I started reading about scratch builds and decided to get my hands dirty with a first model.
I've always liked the DR1 Fokker, so when I found the build log from Steve Shumate I simply fell in love with it and knew it was going to be my first scratch build.
I built it with high density polystyrene foam which I got from the box of my Durafly Corsair (I built a hotwire cutter and cut boards from the packaging box)
It was a great first model. I really enjoyed it and I learnt a lot building it.
I installed a HK DT900 KV motor with a 12x6 prop that gave it a lot of power and unlimited vertical.
Unfortunately it is now in plane's heaven after hitting the ground at full speed in a low loop that ended in a death spiral.
Here are some pictures and a video.

Radio Control Fokker (Scratch Built) (3 min 19 sec)
...Continue Reading