Looks great!

Sorry for being absent, have been too busy in work and family to update thread but as winter closes in I should be able to find some time to get some pictures up.

We ended up changing out the main strut legs to Behotec. The stock ones have so much flex that it made ground handling and steering unpredictable (catchy). The new struts seemed to improve this considerably.

Our canopy also imploded during a knife edge pass at First in Flight. Paritech was quick to custom make an additional former and I increased the number of pins in the mounting system. Thus far, no further problems.

Again pics will be up as soon as I can!

Scott, I have sent to you a PM

BR

Jesús A. Serrano

Yep the airlines are 4mm.
The additional former Scott mentioned is now factory installed in the canopy
and my landing gear looks a little bit different from Scott`s. It´s Air powered.

Hi,

Just needed an opinion since looking for a large size sports jets. How do we compare Natrix with Futura 2.5 or Quantum Mono? Something with nice aerobatics without bad habits and slow flyer too for shorter runways. Plus whats the best, electric gears or the pneumatic for daily flying? Currently flying a kingcat and small futura and now thinking bigger

a little more work is done ...

http://www.rcuniverse.com/forum/atta...mentid=2135819http://www.rcuniverse.com/forum/atta...mentid=2135820http://www.rcuniverse.com/forum/atta...mentid=2135821http://www.rcuniverse.com/forum/atta...mentid=2135822http://www.rcuniverse.com/forum/atta...mentid=2135823http://www.rcuniverse.com/forum/atta...mentid=2135824http://www.rcuniverse.com/forum/atta...mentid=2135825http://www.rcuniverse.com/forum/atta...mentid=2135826http://www.rcuniverse.com/forum/atta...mentid=2135827http://www.rcuniverse.com/forum/atta...mentid=2135828http://www.rcuniverse.com/forum/atta...mentid=2135829http://www.rcuniverse.com/forum/atta...mentid=2135830http://www.rcuniverse.com/forum/atta...mentid=2135831http://www.rcuniverse.com/forum/atta...mentid=2135832http://www.rcuniverse.com/forum/atta...mentid=2135833http://www.rcuniverse.com/forum/atta...mentid=2135834

a bit more ....


http://www.rcuniverse.com/forum/atta...mentid=2156771http://www.rcuniverse.com/forum/atta...mentid=2156772http://www.rcuniverse.com/forum/atta...mentid=2156773http://www.rcuniverse.com/forum/atta...mentid=2156774http://www.rcuniverse.com/forum/atta...mentid=2156775http://www.rcuniverse.com/forum/atta...mentid=2156776http://www.rcuniverse.com/forum/atta...mentid=2156777http://www.rcuniverse.com/forum/atta...mentid=2156778http://www.rcuniverse.com/forum/atta...mentid=2156779http://www.rcuniverse.com/forum/atta...mentid=2156780http://www.rcuniverse.com/forum/atta...mentid=2156781http://www.rcuniverse.com/forum/atta...mentid=2156782http://www.rcuniverse.com/forum/atta...mentid=2156783http://www.rcuniverse.com/forum/atta...mentid=2156784http://www.rcuniverse.com/forum/atta...mentid=2156785


if someone like the Desigm, here is a download link to the cdr files you can use ....

https://www.dropbox.com/sh/ytyj44850...tZM8Xhfna?dl=0

Looks great! There is no lack of carbon in this model. It is a surprisingly big and light (!) model.

I pulled it out tonight to prepare for hopefully the first flying of the season later this week.

I checked my CG and found it was at 385 at the end of last season. I adjusted my two RX packs to the back half of their respective trays and am now at 390 (see pic).

I did a lot of experimentation on aileron differential last season and found that for the previous CG, high aileron was best at 24 mm up, 15 down. I run triple rates on the models and this was for the high rate.

For elevator I run 13 mm high rate up, 10 mm middle rate up, and 7 mm low rate up.

Rudder is max.

Attached is a picture of the alternative struts. They improved ground handling considerably.

As much as a pleasure as the model has been to fly it doesn't land as consistently as the 3.5 Viper or 2.5 Futura. Just seems to float on by. Ive added an airbrake function to test out and if that doesn't cut it may consider increasing flap throws.

Scott

http://www.rcuniverse.com/forum/atta...mentid=2156959http://www.rcuniverse.com/forum/atta...mentid=2156960

Don't know about the Natrix, but the Futura certainly meets your requirements. The Natrix looks nicer, though

https://www.youtube.com/watch?v=uactalLH_a4

Finished ..... :d

http://www.rcuniverse.com/forum/atta...mentid=2158682http://www.rcuniverse.com/forum/atta...mentid=2158683http://www.rcuniverse.com/forum/atta...mentid=2158684http://www.rcuniverse.com/forum/atta...mentid=2158685http://www.rcuniverse.com/forum/atta...mentid=2158686http://www.rcuniverse.com/forum/atta...mentid=2158687http://www.rcuniverse.com/forum/atta...mentid=2158688http://www.rcuniverse.com/forum/atta...mentid=2158689http://www.rcuniverse.com/forum/atta...mentid=2158690http://www.rcuniverse.com/forum/atta...mentid=2158691http://www.rcuniverse.com/forum/atta...mentid=2158692http://www.rcuniverse.com/forum/atta...mentid=2158693http://www.rcuniverse.com/forum/atta...mentid=2158694http://www.rcuniverse.com/forum/atta...mentid=2158695http://www.rcuniverse.com/forum/atta...mentid=2158696http://www.rcuniverse.com/forum/atta...mentid=2158697http://www.rcuniverse.com/forum/atta...mentid=2158698http://www.rcuniverse.com/forum/atta...mentid=2158699http://www.rcuniverse.com/forum/atta...mentid=2158700

and sold ..... so i will build a new one :cool:

Hello Eagle Driver,

I must say its a top notch pro work. Congratulations!! Have few questions:-

1. How many and what Jeti receivers are you using?
2. Is this Gyro which you have installed speed gain assisted?
3. What you think about PB Mercury SrS with Speed Gain Assisted? Would that be as compatible as Jeti Box 200 with the Jeti receivers?

I need to know because I am shifting from 18MZ to DS-16. I was using PB SrS stuff with Futaba receivers but never had an issue untill I had few glitches while using R7008SB with telemetry on. Heard Jeti is glitch free so far :)

Hello haisanjafri,

thanks for the compliment.

Im using a Jeti CB200 with two satellites Rsat 2 EX.
The gyro is a GyroBot 900 Wing Jet, it measure the true airpeed with a pressure tube.
I saw the mercury first time on a model fair last weekend, it looks nice and well made
but i have no personal experience. Yes it will work with two Rsat like the Jeti CB200.

I use my Jeti DC16 and all the Jeti stuff since 2009 and never had any issue.

regards Steven

Thanks for the help Steve. I did some research. The BEC you used supplies 6V to servos whereas we now have 7.4V servos. So what Jeti offers to achieve that?

You can connect 7,4v batteries direct to the CB200 without any regulator,
so your complete system is up to 7,4v. CB 200 has no regulator inside.
I have maybe 25 brand new Hitec 7955TG Servos which i use in this plane,
thats why I use the MaxBec 2d plus.
The small piece left from CB200 which looks like a Rsat is a Jeti rc-switch.

regards Steven

Thank you Steve, I will keep disturbing you through my build. Building a Futura 2.5m

Here you can see the gyros pressure tube installed in the nose

http://www.rcuniverse.com/forum/atta...mentid=2159265http://www.rcuniverse.com/forum/atta...mentid=2159266http://www.rcuniverse.com/forum/atta...mentid=2159267

have fun with your futura build .....

Im on a bad a.. UL now ;-)

Wow thats some great and pro work Steve. I think you are chief engineer in Airbus :) I have designed scheme for my Futura I will PM you

Wait until you see the scheme on the Ultra Lightning .... :cool:
Send me a PM with your mobile number and we can
share some pics :-) on whatsapp

regards Steven

yeah sending you my number
just found out that i cant send pic thru PM lol

Natrix Nr.4 ..... :D

with a slightly different scheme

http://www.rcuniverse.com/forum/atta...mentid=2168365http://www.rcuniverse.com/forum/atta...mentid=2168366http://www.rcuniverse.com/forum/atta...mentid=2168367

Nice, different.
Rcpete

Finally got my Natrix flying after 5 weeks of building & installing. What a VERY nice plane! Good job Paritech!

B300F turbine, Powerbox Mercury SRS with two Futaba R7006SB receivers, 6,2 liters fuel plus large CAT,1,5 liters smoke oil plus large CAT on that too. Dry weight a bit high 19kg because of the large turbine and quite large LiPo's, still flies very light even full of fuel and smoke oil. Haven't tried full throttle level flight yet, but climbs nicely with 30+kg's of thrust.

Flaps are very effective, landings are easy. Knife edge slight coupling to bottom side, very little in fact, no aileron compensation needed. Don't know exact CG, 380-390mm range I suspect. Very neutral behavior, minimal down elevator needed in inverted flight. Had six flights with gyro turned OFF, next time out setting that...maybe some video too...

Nice install Janne! Thanks for the report. Looking forward to getting mine in a few weeks.

I am finishing the drawings of my 80 % Natrix for a P-120 and need some information. Any Natrix owner could tell me the airfoil stab and rudder thicknes at the root?

Thanks in advance

Best regards

Jesús A. Serrano

Finally maidened my Natrix today. Wow, what a really nice flying jet! Minimal trim with the CG at 380mm and super clean rolls. Mine came in at 40lbs (18kg) dry with a smoke system installed. In addition to the Natrix it was also the first flight for the following:

- JetCentral Rhino 200. Ran flawless and with unlimited vertical.
- Jeti DS-16 with Central Box 200. Worked perfectly and felt great in my hands. Love the turbine telemetry.
- Behotec electric retracts. Very strong, worked perfectly.

Thanks to Scott Foster (Berthoud) and Eagle Driver for the helpful information provided in this thread!

Here are a few pics with a video (hopefully) to follow later.

http://www.rcuniverse.com/forum/atta...mentid=2203959http://www.rcuniverse.com/forum/atta...mentid=2203960http://www.rcuniverse.com/forum/atta...mentid=2203961

Craig

For those in the US, Pacific RC Jets will be coming out with the T-3 soon which is the same size and will save you some shipping cost..

https://www.pacificrcjet.com/collections/t-one-models

Looks great Craig! Congrats on the maiden and new model.

Although I have not seen or flown a T1/T3, I have seen/flown/owned many "top" models including the Paritech Natrix, Tomahawk 2.5m Futura, 3.5m Paritech/Tomahawk Viper XXL, Tomahawk Hawk, Shockwave and 3m Leonardo. You would be hard pressed to beat the Paritech Natrix quality wise regardless of price point. The Natrix in this build thread was a full CF model and its construction was impeccable and well ahead of the competition. FWIW, I have owned and flown pretty aggressively the 3.5m Paritech Viper for 4-5 years now which is a model with much less carbon than the Natrix and it looks as good as the day it was delivered.

All the best,

Scott

Scott,
Did you ever experiment crow on your Natrix? As you mentioned before, it is definitely a floater on landing.

Thanks.....Craig

CraigG,
I am now the owner of Scott and Kim Fosters Natrix. I do use crow on my full flap setting. I experimented with it and found that it did help on landing with the "floaty" feel of the Natrix. It still floats in but I feel it helps me get the jet slowed down on final.

I really like flying the plane and I'm sure you will as well.

Darin

Sorry for the stupid sideways pictures. I was trying to delete them when I couldn't get them to rotate and somehow I got two of them in there sideways to add an exclamation point to my incompetence. Please forgive me. Anyway, the pic was at an event last weekend.
Darin

Looks like you have a winner, Craig!

Darin,
Do you remember how much aileron deflection you have with your crow setup? Any pitch change with the crow?

Thanks!

Craig

Congrats Graig, looking good!

I have now about 60 flights with my Natrix and the plane flies nice. But ground handling / tracking is not so good especially when braking on landing. If the brakes bite even a bit unevenly - as usual with o-ring type air systems - it's sometimes quite a wild ride. This I think is mainly due to extremely wide main gear track and light nose. Landing speed is of course a factor here...
Been thinking of changing to Behotec e-retracts and brakes - how do you like these - mainly the brakes?

So far I like my Behotec e-retracts and brakes and I really like not having to fool with air pumps, air valves, air leaks, etc.. My Natrix was a little squirrely on the ground the first two flights and I later figured out I mistakenly had the nose steering in "taxi" mode (i.e. hi-rate/hi-throw) for the takeoffs and landings. I also figured out the mains were a little out of alignment.

So, due to those two mistakes on my part, I can't say yet how well I like the brakes (as far as directional control). They are certainly strong enough and since they can be individually adjusted, I see no reason why they won't be better than the o-ring/air type. I'll post here after I get a few more flights.

Craig

Craig,

We may have tried crow a little but I don't recall it doing much. As with anything, it does become easier to land with more time on itand for us, added flap throw made the biggest difference beyond the stock setup although I cannot remember the specific details of how much more I added, probably 10 mm. I never noticed any negative effects of more flaps.

Scott

Craig,
It's not much, maybe about 3/8". I do not recall any trim change when I put the crow in it just how I reacted the first flight after I did it and thought huh, that did something.
Darin

I was about to order my second 2.5m Futura. But now I am reconsidering.. perhaps the Natrix..... :)

Well, I've got both. Only 7 flights so far on my Natrix but I would say it flies very similar to the Futura and maybe a little better inverted (less down elevator required). It also looks sleeker (in my opinion). No sense in keeping both so I will probably sell my Futura.

Craig

Is this model completely made up of CF? I can see most of the pics here have a carbon fin and lots of carbon on the body and wings.. whats the deal?