Pitbull 3

[oipigface]

From Pavel Zlamal at Baudismodell:

“The Pitbull 3 should be available for the next season. 
Now we are close to finish with the moulds for wings of Pitbull 3.
The wings chord (root) of Pitbull 3 is similar like Pitbull 2. So the first prototype "Pitbull 2.5" will be tested with fuselage of Pitbull 2.
New fuselage for Pitbull 3 might be finished until the end of this year.
We estimate that in February or March the Pitbull 3 should be available for "serial" production. So delivery time in March or April.”

[wookman]

https://www.baudismodel.com/en/production/k2408-actual-production/38-pitbull-3.html

Getting closer.

[oipigface]

There were at least two flying at the Pyrénées Cup. Iñaki Elizondo had two, of which he may have flown only one, and Thorsten Volkers flew one as well. With such advocates, how could it fail. Iñaki was very enthusiastic about his. He has devised his own arrangement of the innards, which avoids cutting big holes in the nose:

 

 

 

 

 

[oipigface]

 

What’s in the box?

Yes, I know it’s upside down. Does anyone know what to do about it? (I’ve already inverted it in the Photo Stream.)

[wookman]

Late Christmas present!

[Phil.Taylor]

1 hour ago, oipigface said:

 

What’s in the box?

Yes, I know it’s upside down. Does anyone know what to do about it? (I’ve already inverted it in the Photo Stream.)

build it inverted of course ! 

[oipigface]

2 hours ago, wookman said:

Late Christmas present!

They started shipping these last August. I ordered it 9 months before that. What I can’t understand is why Iñaki got his before me!

[wookman]

Brexit mate.

[oipigface]

Or possibly a better marketing ploy?

[Andy_B]

wheres the photos then JT

[oipigface]

You’ve seen it Andy.

[Andy_B]

Just now, oipigface said:

You’ve seen it Andy.

Ahhhhh

[wookman]

Red with a yellow sine wave? 

[oipigface]

Only time will tell! Haven’t been able to get in the workshop today so far. 

[oipigface]

Pictures at last!

 

1. The usual very securely packed box.

2. The Pitbull 3 has a very short nose to help it get round corners with a smaller moment arm on the nose weight. This is made possible by a lightweight tail boom. Baudis claim that the boom is also very strong, but are coy about revealing how they have achieved this. The rest of the compensation is accounted for by that big chunk of lead on the left which has been exquisitely moulded to fit snugly inside both the inner and outer cone. It doesn’t leave much space for battery, receiver, switch and servos. The recommended battery is the one in shown here which has a capacity of only 1100mAh. 
 

 

3. The nose weight. If I can find the little pot full of tungsten swarf that I put away somewhere where it would be safe, I’ll have a go at moulding a new one by adding the swarf to a pot of molten lead. This will achieve two things: i) the nose weight will be shorter so it can be lighter; ii) it may even be short enough to fit a larger battery

 

4. You may be wondering where the V-tail servos go. Here they are hiding behind the wing joiner! You can see the edge of the access hatch at the bottom of the picture. How the servo wires are routed through the wing appears to be another trade secret.
 

 

5. The V-tail servos are HV75A’s. I also took a deep breath and paid for HBL6625’s for the wings.

 

 

6. It all fits together! When I bought my first Baudis model, I thought the build quality was perfect. Next to this one it seems shabby.

 

 

7. The short nose indicates clearly that it is indeed a Pitbull 3. Otherwise it would be hard to tell, wouldn’t it?

[wookman]

Nice colour scheme!

There are some innovative things going on in this model. It will fascinating to see if it is a new dawn or an interesting backwater in terms of F3f design.

[Nigel_W]

Very nice indeed, will be nice to see it flying.

You might want to check how well the 1100mAh batteries will cope with the HBL6625s, both in terms of current capability, and duration.  In my Jedi I found that duration with four 6625's was about 30 minutes with a battery twice that size (though it did have RDS rather than LDS).

[oipigface]

On 26/01/2022 at 22:39, wookman said:

Nice colour scheme!

New and different , too!

 

1 hour ago, Nigel_W said:

Very nice indeed, will be nice to see it flying.

You might want to check how well the 1100mAh batteries will cope with the HBL6625s, both in terms of current capability, and duration.  In my Jedi I found that duration with four 6625's was about 30 minutes with a battery twice that size (though it did have RDS rather than LDS).

I’m dubious about the small capacity batteries, too. I have got two packs so I can swap a fresh one in every flight if necessary. There’s also the tungsten swarf trick, but I still can’t find it.

[MikeE]

Sounds like very stiff linkages Nigel. I always check the amount my batteries take after a days flying. It is a rare day when it gets close to 750mah. I typically use KST X10.

Worth being very careful with any install though JT. (If it's not done already.) 

At 1100 I would be careful on cold days when practicing but can't imagine a comp being a problem.

But careful monitoring of usage over the first few weeks would be a good idea.

[oipigface]

Got a bit closer to a maiden this afternoon. I had a go at putting it all together, programming and getting the CG right a couple of days ago. I just copied from my PB2 and made sure the two planes had their plugs in the same channels. This afternoon, it didn’t take long to get the throws symmetrical with the GliderThrow device.
Then I turned to the question of the noseweight. Baudis’ recommendation is to put the CG at 105mm, but I’ve found that I’m more comfortable with the PB2 at 101-103mm. (The variation is because I have yet to figure out a ballasting arrangement that will leave the CG unchanged. The PB3 ballast setup is exactly the same as PB2.)

It needs about 100g of weight in addition to the supplied 316g chunk of lead to get the CG to 105mm. The CG with the 316g only is at 113mm and it seemed like a big ask to get the extra in. Pavel at Baudis was very helpful in pointing out that the battery fits in the space under the front of the wingseat. Putting it there (instead of my usual practice of having the battery in front of the receiver) frees up some space around the receiver. The photo shows a preliminary arrangement with a 92g piece of lead from the PB2 ballast set plus 50g of wheel balance weights. This gets it to about 102mm, and with a bit of creative lead sculpture should free up even more room if I need it. I think I’m probably going to drop the idea of trying to get a bigger battery in.

Overall weight like this is 2550g.

Don’t ask where the switch is going to go!