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Subsonic Mike's blog
Posted by Subsonic Mike | Aug 28, 2014 @ 02:03 PM | 1,703 Views
Well its been a while since I last spoke of my Vigilante....

To be honestest now much has happened.

But stuff is about to!

I now have some radio gear:

And I have done some work on the plans:

I also chose a colour scheme I like: link and (i hope) will start painting tomorrow.

Until next time,

Michael
Posted by Subsonic Mike | Aug 07, 2014 @ 07:39 AM | 1,288 Views
Hello again,

Quick shout out for my blog, I have got my website up and running. All the random stuff I do that isnt RC related will be put on there. This includes CAD and soon (I hope) details of the small liquid rocket I have been building.

Check it out at: http://subsonicmike.wordpress.com/
Not much yet, but its growing!

Michael
Posted by Subsonic Mike | Jul 23, 2014 @ 07:06 AM | 1,697 Views
Hello again,

Today I finally put knife to depron and started my next parkjet. A 630mm wingspan A-5 Vigilante.

Wingspan: 630mm
Lenght: 888mm
Target AUW: 180g
Motor: EMax CF2805
Sevos: 2x 9 gram

With this motor and AUW I hoping to get a thrust:weight of 2.5:1. Should be fun!

Her she is

AUW so far is 52g

More to come!

Michael
Posted by Subsonic Mike | Jun 30, 2014 @ 09:43 AM | 2,000 Views
Hello,

I have a Multiplex Mentor that I have been flying for many years.
With my current set up, on a Spektrum Dx7 using the 3 position switch, I have the flaps come down a smidge on the second position and then on the third position I have the flaps come down fully and the ailerons go up.

If I was to make the ailerons droop with the flaps (for take off) would the aircraft still fly just fine? I ask this because I have heard drooping the ailerons can cause the aircraft to become unstable. But then I was only told this for when the aircraft doesn't have independent flaps.

Im probably over thinking this........

Any advice is appreciated,

Thanks,

Michael
Posted by Subsonic Mike | Jun 27, 2014 @ 03:13 PM | 2,006 Views
Since college has finished I have had allot more time to CAD.
If I had a job, im trying to find one!, I would be building more. But somethings need to wait and this is one. So in the mean time I like to CAD.
And oh boy are finicky little details fun!
The image is rendered at 4675 X 2160 so be sure to zoom in!
Imgur link: http://imgur.com/a/XqEf5#0



Michael
Posted by Subsonic Mike | Jun 22, 2014 @ 08:45 AM | 1,695 Views
I have recently started a kick starter project that hopes to raise funds so that I can develop blended body aircraft and bring plans and design tips to the masses.

But I need your help!

Check it out here
Have a read, have a think. And if you can pledge some money.

Thank you,

Michael

P.S. Tell your friends!
Posted by Subsonic Mike | May 05, 2014 @ 09:22 AM | 2,968 Views
Well my CAD folder has recently passed 80 designs *party popper*.

So i thought I would pick out a few of these designs and show them here:

First off we have a 50's style, carrier born, ground attack aircraft


And heres another take on a carrier born ground attack:


Heres what happens if you design a flying wing around a pair of flaps, and undercarriage:
...Continue Reading
Posted by Subsonic Mike | Mar 02, 2014 @ 11:06 AM | 3,058 Views
When I was younger I always wanted a tracked vehicle. Still do somewhat.

Combine boredom and spare time and this is what you get....


A very easy to build wading tracked vehicle

...Continue Reading
Posted by Subsonic Mike | Feb 18, 2014 @ 06:20 PM | 3,822 Views
Needs cleaning up, but heres what you get when you stick a pair of swing wings of a lifting body:

Wings forward, quite a gap behind the wing. I should probably fix that

Wings back, much cleaner like this
...Continue Reading
Posted by Subsonic Mike | Feb 15, 2014 @ 07:47 AM | 3,245 Views
Finally got this one finished:

1m span, 3 30mm edf's and quite compact with the wings off. The wings start just after the fins

Not the prettiest from the top
...Continue Reading
Posted by Subsonic Mike | Feb 14, 2014 @ 04:21 PM | 3,941 Views
Im still tinkering with blended / lifting body aircraft here in Britain,

Heres the latest:

I call her HSRV-2 (high speed research vehicle 2, aren't i creative?)
HSRV is a 1200mm span rocket powered aircraft that I would love to build one day when i have the money. Im aiming for 200mph+ But any speed above 70 would provide valuable data on the flight envelope of blended bodies.

Here some more images:

Front View
...Continue Reading
Posted by Subsonic Mike | Oct 13, 2013 @ 09:38 AM | 3,438 Views
Well I might as well show these off in my blog:


...Continue Reading
Posted by Subsonic Mike | Jul 26, 2013 @ 11:08 AM | 3,749 Views
Today I did the rest of the lifting bodies frame.
2 hours of very fiddly work. But I can say it was worth it, for I now have a frame ready for tissue covering. The weight so far is 13g, 2 grams lighter than the ribs before they were sanded and slotted.

If I can generate enough interest, when I have finished the model I will make full plans and building guide for free download.

Enjoy!
Posted by Subsonic Mike | Jul 25, 2013 @ 04:15 PM | 3,965 Views
Its started! the second lifting body is finally underway!
Man I cant belive its been over 2 months since I got the balsa... Time and school got the better of me (again).

Well here is the beginnings, enjoy!

Construction notes:
Its built from 1.5mm balsa and will be tissue covered.
Wing span = 132mm, length = 300mm
Construction method, Boxy, like the last one (I think its called egg box construction?)
Tomorrow I will finish of the balsa work and get my Dad to teach me how to tissue cover.

Thanks!

Michael
Posted by Subsonic Mike | Jun 03, 2013 @ 09:46 AM | 3,744 Views
Im back!
Im almost done with those blasted A level exams and soon to building again!
That means my second lifting body will be made soon[ish]

Since I haven't been able to build much recently I have been testing and tinkering with my current lifting body. Im proud to say that its completed over one hundred flights!
Its also had 5 nose repair jobs, a new launch hook, 8 sets of fins and 3 sets of elevons attached. The latest refit is the most major in terms of performance.

Over a 3 week period I spent roughly 10 mins a day (give or take) on a CAD model of a lifting body park jet. I completed this yesterday. This lifting body is based on my current one but is double the size and man small tweaks have been made to improve its performance.
Since my current lifting body is closely related to this parkjet I refitted it to make it a scaled down version.
I changed the elevons added a imitation motor and ballasted so its a scale weight. (its 20g over my target weight for the parkjet.)

Michael
Posted by Subsonic Mike | May 11, 2013 @ 07:56 AM | 3,668 Views
I now have the balsa I need to make the second lifting body.
Im now waiting until i have time, that could be when my exams finish (4th june)...
Soon to be made!

Michael
Posted by Subsonic Mike | May 07, 2013 @ 01:42 PM | 6,955 Views
Well I was messing around today with my lifting body (now called Alaminus) , just trying things out. I tried things like different fin angles and CG
Then for some strange reason I though of dihedral and how I have notice many lifting body (ish) Nasa aircraft (1*) have had a flat top but with a V shaped lower section.
I then my mind must have put 2 and 2 together and thought maybe dihedral could stabilize aircraft with just the lower surface at an angle. I never looked into how dihedral works, I just knew it stabilizes aircraft...

No point wondering, time for testing!
And in the usual bodging spirit I grabbed paper and tape and added a temporary new section to Alaminus and threw it...

I can safely say it works, its now too stable!
Before the extension, Aluminus would slowly rock back to horizontal after a bank.
With the extension, I cant roll it without going inverted! Its like its on rails. I threw it at a bank of 45 degrees and within 10cm it was horizontal.
But I now it has a nasty stall, nose up one wing down spin. (death stall)

Test success and 0 spent.

As always, If you have any questions just ask.

Until next time, Michael


Notes-
1* this flat top V bottom is very vissible on Lockheed's Have Blue (link).
Posted by Subsonic Mike | Apr 30, 2013 @ 01:43 PM | 3,922 Views
As Rolf Harris said, "can you tell what it is yet?"



(no prizes :P)

More will be soon! (week or two)

Michael
Posted by Subsonic Mike | Apr 15, 2013 @ 12:41 PM | 4,280 Views
Making a aircraft design is one thing, knowing how aerodynamic it is and how to improve this is another.
Ever since I started to make aircraft designs I would like to one day make into proper RC Models, I have wanted to put them in a wind tunnel and improve them. But I don't have one and making a accurate one isn't exactly easy- or cheap.
I then found out about Computational fluid dynamics (CFD).
BUT CFD didn't come cheap; and when I did find some open source CFD there was no clear instructions on how to use it or even install it.
Then I found a lifeline. Autocad (autodesk) have a piece of Software known as Project Falcon.
From the moment I saw the words CFD and Free i though, whats the catch? Hard to use? Hard to install? Only available for a free trial?
None of the above applies.
You download, install, find a .obj (or export one from your choice of CAD software) and just use it.
The simulation runs smooth and can simulate airflow up to 1000 m/s.

And if here are some screens: The first is the sub in my avatar, with a head wind of 5m/s, the second is my A-46 Strike master at 680 m/s (mach 2)

Project Falcon Link

And as always, if you have any questions feel to ask!
Michael
Posted by Subsonic Mike | Apr 12, 2013 @ 09:08 AM | 3,705 Views
I have now completed a small animated preview featuring clips from four of my main animations.
All models feature in the video were made by me.

Amination Preview (0 min 39 sec)


Enjoy!

Michael