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Old Mar 28, 2013, 01:54 AM
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Joined Sep 2007
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New Product
Pitbull F3B/F3F

Received my new F3F tool produced by Jiri Baudis; The Pitbull F3B/F3F.
Prototypes have been flown in F3B catgory by Jiri himself last year, and
were also flown in the 2012 F3F WC at Rugen in October.

The feedback as far as I got it, was promising, and is that this is a model up there with Pike Precisions, Freestylers etc.

The box just opened and first impressions are just awesome. The colorscheme I prepared for this model could be some complicated to do, with cutouts for control surfaces were the colors changes.

But this was done superb by BaudisModel. The model also have the same double joiner system like the Fosa, the fuse seems to be
a shorter Fosa like fuselage, but as slim as the Fosa. My model is a double carbon F3F strong version 160 gram outer skin, 68 gram inner skin. Hopefully it will come out AUW not exceeding 2400 grams. Empty weight is 1870 grams, without RDS set and wiring

Vital data for the Pitbull:

Wingspan: 2980mm
Lenght: 1435mm
Wing area: 54,9 dm2
Aspect Ratio: 16,5
Weight: 2000-3400g
Type: F3B/F3F
Design: Baudis Jiri
Airfoil: Dirk Pflug
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Last edited by krvedaa; Jun 26, 2013 at 04:42 AM.
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Old Mar 28, 2013, 09:01 AM
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UK
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239 Posts
Looks nice, what's the ballast system and how much ballast will it take, surely more than 1400g indicated in the specs? My Cyril F3F came out at 2200g empty with 1600g ballast, but I don't think its double carbon.

Cheers

Tom
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Old Mar 28, 2013, 09:20 AM
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Australia, QLD, Gold Coast
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Interesting. .
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Old Mar 28, 2013, 09:27 AM
Challenge is rewarding
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San Diego, CA
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Very nice!
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Old Mar 28, 2013, 11:56 AM
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Would you mind to measure the root chord?
Will probably see it in the 1st eurotour 2013 contest next week in Colmar.
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Old Mar 28, 2013, 12:14 PM
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USA, CA, Seal Beach
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Exciting
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Old Mar 28, 2013, 01:35 PM
Bro
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Southern California
Joined Feb 2003
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Pit Bull

Howdy,

We should have a few of these in our next shipment.
Warren Day will be "testing" them, and I may even have to also...

I saw these molds, in fact we cracked the molds open when I was staying in Jesenek at Jiri's house last September. The molds were just finished when I arrived. This model, like all of Jiri's will be another winner, no doubt! And the 2x Carbon Competition version will be good for F3B too!

Best,
Bob
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Old Mar 28, 2013, 01:37 PM
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The ballast consist of 6 pce. of dim 14x14x82mm aprox. 135 grams for wings, and 7 pce. of dim. 16x10x50mm aprox. 65 grams. for the fuselage ballast tube.

My set totally were 1276 grams in brass, and must be exchanged with lead, gold or tungsten carbide currency. For my pocket, I will go for the lead and live shorter.

After my calculation with these dims. should give approx. 1700 grams if replaced by lead.

The root cord is aprox. 220mm or 22 cm.
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Old Mar 28, 2013, 03:09 PM
Build A Rocket Boys!
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Portland, Oregon
Joined May 2002
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It's always exciting to see a new plane from Baudis. I would love to know the design objectives for this model. Better turning, faster straight line speed, or perhaps both? Maybe I answered my own question?! .Perhaps the name PitBull is a hint. Bites down and locks on. Anyhow, I'm looking forwarding to seeing how this one goes....
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Old Mar 28, 2013, 04:55 PM
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Launceston Tasmania
Joined Mar 2004
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Thanks for sharing Krvedaa, you should have a good Easter.
Going RDS?

Interesting diagonal cut on the spread tow fabric in that shot from Bob. Wonder why?






Chris.
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Old Mar 28, 2013, 05:35 PM
Don't take your guns to town
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Thousand Oaks, CA
Joined Mar 2004
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I'd guess that piece of fabric was flawed and is now being cut up for other parts. It's common to add a diagonally cut extra layer like that, but only inboard, never outboard.
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Old Mar 29, 2013, 06:07 AM
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UK
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Thanks for the info Krvedaa, look forward to reading the flight report, loving the RDS in my Cyril on Futaba 3150's and Futaba 9650's on the tails, what servos are you going for?

Tom
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Old Mar 29, 2013, 07:13 AM
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Hi Tom,

It will be prepared with RDS, and I will use Futaba S3171SB servos in the wing and Futaba S9071SB in the fuselage.

I bought these S.BUS servos for two reasons:

-to have the possibility to use the S.BUS port in the neat and small Futaba S6103SB receiver, which seems needed in the PitBull`s slim fuse.

-to have the possibility to use my Futaba GYA-431 aileron gyro which only can be used with dual ailerons in S.BUS mode.

Reason #2 is no longer an option since in my country there is an consensus to not use gyros in F3F due to possible controversy and unclear rules.

These servos will be powered with unregulared Li-Fe
6,6V 1450mah accu pack.

These servos have the same spec. as S3150 and S9650,
but S.BUS compatible.

I considered the Futaba S3172SV high voltage servo,
but discarded them, since I would ended up with slower servos.

Due too my 3 year old daughters illness, sitting right now with her hospital bed, there could be months before I am able to prepare the PitBull.

The spare time I may get, propably will be used to fly my recently prepared Strega and Skymax 4.
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Old Mar 29, 2013, 08:23 AM
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UK
Joined Aug 2007
239 Posts
Sorry to hear your daughter is unwell, hope she gets well soon.

I too toyed with the idea of S-Bus on my next build, but in the end I decided against it due to availability and cost. Will be interested in how it works out for you.

Cheers

Tom
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Old Mar 30, 2013, 06:00 AM
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Weights

The model were weighed of it different parts and were:

Wings: 694g x2
V-tails: 36 & 37g
Fuselage 298g
Joiners: 115g (57 & 58g)
Accecories, RDS set, frames wiring, servotray etc. 109g

Total: 1983 grams for the F3F double carbon (160/68g fabric) strong version
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