Bob.R

My Feedback: (2)

The Speedcup should be very interesting this year. Pics of the Hayabusa below.

evan-RCU

Looks like the bar is raised again.

I-Love-Jets

So, last weekend again the DACHAU speed meeting took place (near Munich) in order to prepare for the Sept 27th –28th EURO SPEED CUP 2008.



The refined Doppler effect speed measurement device by high quality microphone and simultaneous speed calculation was used again.




Due to the fact that no FAI rules were applied for the measuring system and for the flight corridor (no 200 m speed trap), the results of Dachau 2008 are inofficial speeds for training purposes only.

The overall winner of this speed meeting was the already mentioned HAYABUSA F3S purpose built E-speed plane achieving an averaged [(head wind + tail wind) / 2] speed of 365.5 kph. But he will use a different, more powerful setup during the SPEED CUP in two months. That is a potential world record holder.




In second place was the black/yellow flying wing type purpose built speed plane powered by an OPS 60 RIRE VAE (360.5 kph).



These IC engines were used preferably (all highly modified):

- OS .91 VR-DF
- OPS .60 VAE RIRE
- Novarossi .61 FIRE
- Rossi 61 RIRE
- OPS 40 RIRE

Here’s a quality vid of the 2008 Dachau speed training meeting (you will note a quite strong, but constantly blowing wind):

http://verein.rc-network.de/10js/dachau_2008.avi (right click + safe link as)

Finally more pics:

http://www.rc-network.de/forum/showt...t=92931&page=2

Bob.R

My Feedback: (2)

The video is excellent - just like being there, almost. The sound the Hayabusa makes at full throttle is eerie!

Strykaas

Hi ! Thanks for sharing

Shown models seem fitted with HowFast pitot tube, is it ?

I-Love-Jets

Hello,

this is the UniLog system. It enables a full log of almost any kind of data especially for electro driven speed planes including rpm, Watts, Volts, capacity, speed (not only the peak), altitude, temperature etc over time...

You can see one sample of a Hayabusa Log at the previous page of this thread.



The UniLog speeds were not used during the meeting because the pitot tube does detect the relative speed between the plane and its surrounding air. The speeds recorded by doppler shift on the other hand respresent absolute speeds of a plane versus the ground (= groundspeed).

Strykaas

The SM Modellbau system looks very nice, but a bit on the pricy side []...

I've just seen the video. These are the most extreme power dives I have seen on RCU, ever [X(] !

C_Roundy

Dear I-Love-Jets, Sir, this is by far the best video and audio compilation of terminal velocity dives that I have ever seen on the world net; Bar none. I am COMPLETELY fascinated with what you guys are doing in Germany the last few years. I would love it if you keep the updates up. Our design for terminal velocity does not meet your international rules, but nonetheless I love watching your evolution.
Best Regards, C.R.

I-Love-Jets

Hello C.R.,

I am sure that many folks will agree that your lovely speed delta breed indeed does represent a very auspicious addition to the still small group of refined RC prop driven speed plane designs world wide...



@all

You may have noticed that several pilots in Dachau did not fly the FAI F3S compliant fight path.

That means they did not position their speed plane correctly within the default horizontal flight corridor (between 5 and 35 m of altitude) already a 100 meters before the (imaginary) 200 m speed trap.




Instead the pilots in Dachau often performed hyperbolic shaped fly-bys leading to potentially higher terminal speeds than through a summed 300 m horizontal. So their speeds during the oncoming EURO-Speedcup in September will not be as high as in Dachau potentially.

The reason for that pilot behavior is based on the limited local spacial circumstances of the Dachau flying field.

For that the Dachau speed training meeting 2008 was predominantly useful to fine-tune the best performing prop, compression ratio, pipe length etc and to deliver the status quo per speed plane setup relative to other Speed-Cup contenders (= discovering the speed-gap between the various planes within one competition class, e.g. the 10 cc class F3S-C).

Below you can find the internationally applicable FAI rules for the EURO-Speedcup:
http://www.f3s-speedcup.de/reglement.php

I-Love-Jets

During the FAI F3S event (= Speedcup) also time restrictions are necessary due to the high amount of participants. So the engine starting plus take-off procedure and a minimum of two successful fly-bys (time/speed readings in both directions) have to be carried out within no more than 4 minutes per valuation flight.



Safety regulations are mandatory as well for the Speed-Cup:
[ul][*] thorough technical inspection of each speed plane prior to first engine run[*] engine shut-off device (5 seconds interval effectivity)[*] launch pad not allowed[*] the 200 m measuring section including extended approach and departure corridors mustn’t be entered [*] carbon-fibre props[*] hardhats for pilots and helpers[*] eye protection during engine starting[*] caller/helper (supports the pilot to hit the FAI course smoothly => maximum speed)[*] defined minimum distance to spectators, to the measuring crew and to the other pilots[*] safety fence[*] separated engine test run area[*] emergency ambulance[*] walkie-talkies for the flight path judges, the measuring crew and the commander-in-chief (near the pilot)[*] exclusive right of using the airspace for the duration of the event[*] ...



[/ul]

I-Love-Jets

In case somebody wants to visit the event:

The EURO SpeedCup 2008 again takes place in Neumagen-Drohn (same location as last year), details:

http://maps.google.de/maps?f=q&hl=de...9823&z=14&om=1

http://www.f3s-speedcup.de/anmeldung/index.php

http://www.f3s-speedcup.de/documents/F3S_DM_2008.pdf

http://www.f3s-speedcup.de/documents...ng_messung.pdf

k8svrick

I downloaded the video file and all I got was the audio portion. Anyone else have that problem?

Strykaas

You can get out of trouble by using VLC. It will play the file with no issue at all. Windows Media Player has probably a codec problem on your PC, which is not the case with VLC (integrated codecs).

balsaeater

Is it me or is the vidio taken down as nothing happens when I try to get it and nothing to find in the site rc-network.de under search "sucken " button ???

EDIT: i see about the VLC will try that


Amazing speed ~265MPH

I see a curious ability of the log machine to infer the dive sequence allowed the plane to enter the planet for a depth of ~25 meters and then extract itself to continue to fly or maybe I am reading the log wrong ???

Amazing speed ~265MPH


Balsaeater

I-Love-Jets

Hello balsaeater,

there should be no problem with watching the Dachau 2008 vid:

Download the film to your computer by clicking the right mouse button and saving the target as....

Yep, the VLC media player is the right software to watch this vid.





There’s indeed a mistake happended on displaying the altitude scale of the Hayabusa log. So you just have to shift the altitude chart about 50 m upwards to read the altitude correctly.

Anyway – such [ul][*] on-bord logs as well as [*] audio Doppler-shift recording as well as [*] radar gun (Stalker Pro) readings
[/ul]will not be used during the F3S Speedcup when ist comes to FAI compliant speed measuring. Only the internationally comparable 200 meters speed trap results do represent the true capabilities of R/C speed planes worldwide. To sustain terminal speed over a long distance horizontally is quite difficult... [sm=48_48.gif]

Strykaas

Well I do not think it's a mistake unless you can adjust the static air pressure on the ground... which is useless anyway. I bet the Unilog is set for 1013.25 hPa on the ground.

kkn

My Feedback: (3)

Hi,


Is the Hayabusa being kitted and sold? If yes, can you refer me to their web site?


Thanks and regards

Joseph

I-Love-Jets

Hello Joseph,

as usual the Hayabusa - like most of the current nitro and E-speed contenders for the EURO Speedcup - is a purpose built prototype.

The Hayabusa for instance is driven by a custom made motor especially tailor-made for this speed plane:
[ul][*] 4,5 kw peak-power[*] 170A for a period of 10 to 15 seconds[*] 231 gr. weight
[/ul]
The entire setup of the Hayabusa should cost in excess of 2000 EUROS – because almost anything is handbuilt for competition operation (like F1 cars). Hopefully in future the (private) engine maker will sell a batch of these engines ...

A problem still remains the enormous heat accumulation within the fuse due to engine, controller and battery warming. For that the powertrain cannot be stressed longer than about 15 seconds at full throttle for each speed recording.

kkn

My Feedback: (3)

HI,

thanks for the reply, That's fascinating.....170 Amps and 4.5Kw, no wonder its a missile.

Best regards

Joseph

I-Love-Jets

OK,

after last weeks Dachau speed training meeting this weekend the Osnabrueck speed training meeting took place in the northern part of Germany. This was the second and very last chance for the pilots to prepare their machines for the big event - the EURO Speed-Cup 2008 next September.








The main difference between the Dachau and the Osnabrueck training flying was the speed measuring device:
[ul][*] In Dachau the reliable but not FAI compliant audio Doppler shift measurement has been applied.
[*] However, this weekend’s Osnabrueck speed measuring system was the FAI compliant optical system that uses two photo-electric barriers for the 200 m speed trap. It is the same system used for the 2007 Speed-Cup when a new official FAI F3S-F (E-speed) world record of 362.2 kph was set (see post # 61 of this thread).
[/ul]

Some Osnabrueck E-speeds were even faster than the actual WR, but all Osnabrueck results are inofficial speeds only because of the absence of FAI official authorised observers/witnesses and because of the admission of wing loads exceeding 75 grams/dm^2.

The highest speed of all Osnabrueck participants again was obtained by the Hayabusa F3S. The pilot achived a spectacular 392 kph (averaged over 200 m in both directions). His very smooth flying style evidently was very supportive considering the quite narrow flying corridor of the FAI 200 m speed trap course. Let's wait and see what the "Hayabusa" or its main rival - the "Eagle" - will gain during the Speed-Cup FAI-officially. [sm=tongue_smile.gif]

More pics of the Osnabrueck training meeting 2008 can be found here:

http://www.rc-network.de/forum/showthread.php?t=111308

http://www.3d-pilot.de/bildergalerie...bum/index.html

I-Love-Jets

“Eagle“ pics:
[ul][*] up to 10S Lipos stored within wing and fuselage[*] up to ca. 200 Amps
[/ul]

Strykaas

I'm amazed at the lack of reaction/comments in front of these. Thanks for sharing !

C_Roundy

Perhaps it is because normal individuals have a hard time wrapping their brains around accomplishments so alien to them; and therefore need some time to digest the reality of it.
-or- maybe it is because the individuals who have enough cahonies to do something about what they have seen are [almost] all at the drawing board right now.
-or- maybe it is the usual human case that the poeple who actually have something worth while to add technicly, are hesitant given the degree of perfection that they must surpass to add anything useful.
-or- there MIGHT be somebody lurking, watching, and READY to unload new aero principles to refine the art to a whole new threshhold of efficiency and speed.........
Regardless, thanks for the excuse to show that you are not the only one who cares about, and appreciates the breed, and therefore the thread.

Best Regards C.R.

Troy-RCU

My Feedback: (1)

I'm just waiting for the big day. I love the increased coverage this year compared to prior years; complete with photos and vids!

combatpigg

My Feedback: (3)

I for one, lack the brains and the cajones to add anything.
Anything I have to say would slow those guys down 50 mph.
I am gratefull for the coverage, ILJ! I'm "rooting" for the flying wing to kick those gliders in the *****.