Archive for November, 2010

High altitude without turbo

I was thinking one day about the Bohannon B1. It is basically a modified RV (Harmon rocket something) with very high power to weight ratio and that’s it. This plane climbed to something like 14 km.

So consider this (high excess power) case hypothetically:
– Airplane with high aspect ratio (low span loading) with high power engines with high power to weight ratio. Example: Chevrolet LS9 (600 hp).
– If the plane can maintain level flight with minimal power. 35000 ft we have remaining power 0.2 * 600 = 120 hp.
– Diamond flies nicely with 120 hp, actually 90 hp is quite sufficient for it for normal cruise speed. With lower span loading much less should keep the plane level.

So now the naysay would be “nah, LS9 can not sustain 600 hp continuous without breaking”. However, 120 hp is hardly 600 hp continuous even if the engine is at full throttle and giving all it can at the altitude. It is still stressed only for the 20 percent power.

Same engine, with single stage turbocharger, it should be possible to extend this quite a bit further. With two stage turbocharger even higher altitude should be possible, 70000 ft might be feasible given that the other challenges that come with the altitude are solved somehow.

So you could have a 1200 hp airplane with 240 hp used at altitude for cruise (in case of twin). This should give a quite generous cruise speed at the altitude given that the props are big enough (disc loading low enough).

KS400 airfoil


Airfoil


KS400 wing at altitude 20 km, speed = 155 kts

Here is the dat-file. Download it here: KS400.dat

Works from Re 500 000 up.

More simulations to follow later.

Two My First MeeGo Conference Videos Online

I was shooting a lots of videos at the MeeGo conference with my HDSLR equipment and I managed to put the first ones online. I will upload more videos later, but I decided to get these published now that I have something in a timely manner shortly after the #meegoconf.

These first two do not feature any presentations or presenters, devices (like the Lenovo idea pad which I did not receive myself btw), they are just trying to illustrate the location and few attendants. The latter one has myself also for a short moment visible.

First one (not color corrected, no music, clips just joined together):
Raw footage from Aviva Stadium

Second one (color corrected, with music):
Aviva Stadium (with Music)

If you were there, I hope you like the imagery I captured and it will help keeping the first MeeGo Conference in your memories.

I may publish some of the videos later on Vimeo but because I am not plus member, I can’t upload there more than one video per week, therefore these first ones are coming via Youtube (worse quality), sorry about it.

I made a new Test Song with demo version of Rob Papen Blue

I created a short test song with Rob Papen Blue software synth. This synth sounds pretty good to me, creates me similar inspiration than the Access Virus b used to do when it was new.

End titles

In addition to the Rob Papen blue, Apple loops and some other drum samples were used.

DISCLAIMER: This track contains very heavy bass and is therefore best reproduced with audio system capable of reproducing the deepest notes. I have set high pass to 20 Hz, therefore it should not break a good subwoofer, but less capable sub can bottom with this track when played loud. I recommend playing this loud because this is the point. If your sub breaks, get a better one next time!

Why I have cats

I have noticed that cat magazines are full of this and that family cats and their rewards in this and that competition. So for me it looks like some are having cats because they are sports gear custom designed for a competition. I feel differently – I have cats because it is the cat life long commitment to be their friend. For me our cats are our family members and not some tools of some competition.

When we got our youngest cat, a somali cat, it was sold with requirement of doing some offspring with the cat. However, maybe luckily, it was found out that the cat had a white spot in the fur. Nothing special, in fact it looks cute, but for the cat breeders it seemed to look most revolting error that the cat can have. Well I started wondering that “What are these people talking about?”. True love for a cat is unconditional love because the cat is my friend, not because it is perfect for some cat competition and perfect representation of the custom designed cat race and family.

So I am glad my little cat is out of the competition and cat production plant things and is just my committed friend. Every day waiting me to come home and every day talking to me, sleeping on top of me on the bed during nights (I fall asleep to the cat purring), and sharing life with me. They are my little children sort of.

So this is how this cat ended up on us and how he is my friend. Next I will write about how to raise a cat properly, and especially about what to not do. Many people do critical errors on raising a cat because they don’t understand them. You have to be able to talk with them and understand their talk and feelings and you both need to adore each other (you need to become a mother cat), then you can raise them properly. So stay tuned, more to come.