Flat cat from dr psycho twin set up.

[metalsak]

hi, my name is stelios,and after a fast flat cat,with one motor,i whas thinking to build a second one with two motors.....a little dificult,but i think it will works.
the set up will be two leopard 2845/4110 kv. two kokkam 3s 2,200mah and two turnigy 120 marine.the drives will be with piano wire 1,5mm,and all the parts,will be machined from me,as the boat ends in angle. some photos of the project,and i hope you like it. please excuse my english,as they are not my mother languange.

first the motor supports on 7075 alum. and some carbon supports.
http://imageshack.us/scaled/thumb/849/pa240195.jpg (http://imageshack.us/photo/my-images/849/pa240195.jpg/)
http://imageshack.us/scaled/thumb/407/pa240190.jpg (http://imageshack.us/photo/my-images/407/pa240190.jpg/)
http://imageshack.us/scaled/thumb/707/pa240205.jpg (http://imageshack.us/photo/my-images/707/pa240205.jpg/)
http://imageshack.us/scaled/thumb/850/dscn8598s.jpg (http://imageshack.us/photo/my-images/850/dscn8598s.jpg/)
http://imageshack.us/scaled/thumb/208/dscn8594a.jpg (http://imageshack.us/photo/my-images/208/dscn8594a.jpg/)

[metalsak]

as we play in salt water,and is dificult to find mirror water,i prefer to make stiffer some areas....

http://imageshack.us/scaled/thumb/688/pa280235.jpg (http://imageshack.us/photo/my-images/688/pa280235.jpg/)
http://imageshack.us/scaled/thumb/594/pa280237.jpg (http://imageshack.us/photo/my-images/594/pa280237.jpg/)
http://imageshack.us/scaled/thumb/96/pa280228.jpg (http://imageshack.us/photo/my-images/96/pa280228.jpg/)

[metalsak]

after that motor suport fitting whas good,i take them for oxidation.
and then gluing on the boat,with the piano fitted.
http://imageshack.us/scaled/thumb/145/dscn8618.jpg (http://imageshack.us/photo/my-images/145/dscn8618.jpg/)
http://imageshack.us/scaled/thumb/685/dscn9228p.jpg (http://imageshack.us/photo/my-images/685/dscn9228p.jpg/)
http://imageshack.us/scaled/thumb/405/dscn9314.jpg (http://imageshack.us/photo/my-images/405/dscn9314.jpg/)

[metalsak]

some more photos.
http://imageshack.us/scaled/thumb/145/dscn8618.jpg (http://imageshack.us/photo/my-images/145/dscn8618.jpg/)
http://imageshack.us/scaled/thumb/685/dscn9228p.jpg (http://imageshack.us/photo/my-images/685/dscn9228p.jpg/)
http://imageshack.us/scaled/thumb/405/dscn9314.jpg (http://imageshack.us/photo/my-images/405/dscn9314.jpg/)

[metalsak]

excuse some problems with image shack......
here some photos more from the suports
http://imageshack.us/scaled/thumb/839/dscn8677w.jpg (http://imageshack.us/photo/my-images/839/dscn8677w.jpg/)
http://imageshack.us/scaled/thumb/839/dscn9255.jpg (http://imageshack.us/photo/my-images/839/dscn9255.jpg/)
http://imageshack.us/scaled/thumb/706/pa270217v.jpg (http://imageshack.us/photo/my-images/706/pa270217v.jpg/)
http://imageshack.us/scaled/thumb/717/dscn9256l.jpg (http://imageshack.us/photo/my-images/717/dscn9256l.jpg/)

[metalsak]

some more from brass tube,also with carbon suport, and some from machining of the collets,as it whas dificult to find 4mm motor side to 1,5mm for the piano wire...here i do my best for good centers,in order not to be unbalanced the collets.
http://imageshack.us/scaled/thumb/19/dscn9308q.jpg (http://imageshack.us/photo/my-images/19/dscn9308q.jpg/)
http://imageshack.us/scaled/thumb/853/dscn9315j.jpg (http://imageshack.us/photo/my-images/853/dscn9315j.jpg/)
http://imageshack.us/scaled/thumb/850/pa270210.jpg (http://imageshack.us/photo/my-images/850/pa270210.jpg/)
http://imageshack.us/scaled/thumb/844/pa270214.jpg (http://imageshack.us/photo/my-images/844/pa270214.jpg/)
http://imageshack.us/scaled/thumb/849/pa270212.jpg (http://imageshack.us/photo/my-images/849/pa270212.jpg/)

[metalsak]

some very dificult pieces because they have a lot of angle,as i want to be the same shape with the boat.....
http://imageshack.us/scaled/thumb/21/ujsb.jpg (http://imageshack.us/photo/my-images/21/ujsb.jpg/)
http://imageshack.us/scaled/thumb/23/9uvh.jpg (http://imageshack.us/photo/my-images/23/9uvh.jpg/)
http://imageshack.us/scaled/thumb/543/06qk.jpg (http://imageshack.us/photo/my-images/543/06qk.jpg/)
http://imageshack.us/scaled/thumb/9/rhj2.jpg (http://imageshack.us/photo/my-images/9/rhj2.jpg/)
http://imageshack.us/scaled/thumb/827/vxh1.jpg (http://imageshack.us/photo/my-images/827/vxh1.jpg/)

[metalsak]

today i test them together with the drives,but with no bearing ball inside,and they fit very nice....two carbon parts in 1mm thikness in each drive,will make them in hold,and also in moving up-down.
the drives and the suport, is ,in the same shape like the hull is. today the boat is in this situation ,and i must work on this project to finish it.
i hope you like it......

http://imageshack.us/scaled/thumb/5/cwwg.jpg (http://imageshack.us/photo/my-images/5/cwwg.jpg/)
http://imageshack.us/scaled/thumb/838/f9wk.jpg (http://imageshack.us/photo/my-images/838/f9wk.jpg/)
http://imageshack.us/scaled/thumb/826/cz77.jpg (http://imageshack.us/photo/my-images/826/cz77.jpg/)
http://imageshack.us/scaled/thumb/819/j3j2.jpg (http://imageshack.us/photo/my-images/819/j3j2.jpg/)
http://imageshack.us/scaled/thumb/845/o35l.jpg (http://imageshack.us/photo/my-images/845/o35l.jpg/)

[andi 66]

Its a very nice projekt.I think it will run very good:prost:

[metalsak]

thanks andi!!
i hope that it will run the same good as the one flat cat,that i already have ,with one motor.but i will need also and yours recomendations....for example:
i whas looking for small controlers,like schulze 60 amper,but they are out of business...so the turnigy 120,that i already have,is too big,and heavy....the same the turnigy 60 (is exaclty the same like 120)...
i have already two swordfish 40amper,but i think is too small in amperage,and cannot let me to drive in 4s....so i look for something,to 60-70 amp,that is really small,and can work,on 4s....any recomendation,will make me happy!!!

[andi 66]

http://www.ebay.de/itm/JAMARA-XETRONIC-BRUSHLESS-FLUGREGLER-70A-90A-40g-NEU-/400371794493?pt=RC_Modellbau&hash=item5d3804c23d

I can,t say about that controller because I only take turnigy

[Alex123]

Beautiful work.


I built a Flatti with 2xScorpion 2221/6 and 2xTurnigy 120 but it was not simple.
I have´t any water-cooling and only 1x3S Lipo for two engines, but the boat runs perfect. Yours must run even better.

Alex

[roundnose]

Good Morning Stelios!

I recommend the Robbe Roxxy series, 960-6 or 9100-6.
Very good controllers, the 9100 i think you can even use without water cooling.
Compact design and a good BEC.

Pretty good work you've done!

Best regards
Werner

[metalsak]

thanks guys!!!!!!!!!
andi 66 i see first time this controller.....looks pretty!!

alex123 thanks alot. i am veeery interest to see yours project.....i whas thinking that im the only one with twin flati.....please send me photos!! or video!!:jaw:

mr roundnose i think you are in my mind!! yesterday i whas looking for this two controllers...and if i remember correct,is a flati,(yours i think) that use this type...
i will go to get this two in 60 amper version,as i will use water cooling for controllers only.
thanks for the help!!! stelios.

[Alex123]

Your boat is much nicer, but I fear that the drives on your Flatti are somewhat too heavy for the boat.
Here are some pictures of mine.

Alex

[metalsak]

whow!!!!!!! alex,is the first time for me to see this project......very good!!and very nice collets,on the motors!!
for the weight,you are right,that i must be carefull...but with the things inside(all) and the twin mini servo that im thinking to put,the twin flati,is 50gramms lighter,than the 1-motor flati that i already have(1320gramms with nanno 4s 4,500mah and leo 2860).....i will keep you updated for the weight!!!
thanks so much for the photos!!

[Alex123]

I think, the problem is not the weight all in all, but you have a lot of weight in the back. (Drives and Lipos)
Maybe too much, but nobody knows it. Just try it.:)

Alex

[kirschgruen]

Great work Stelios! You encourage me to go on with my own micro cat twin project.

Another option for small powerful ESC is Turnigy Plush 80 with custom watercooling. (pictures below)

If you`re not on budget ... robbe roxxys are the first choice!

Fabian

[metalsak]

thanks so much,for helping me.......
i whas very unhappy last week,because i lost my one motor flatti!!!
it whas a modeler happening in a nice island ,and from a mistake in the fail safe,the boat goes underwater and become lost(100% throtle)......i remember all my special and dificult machining,and that gets me very unhappy,as i wake up and sleep ,with the memories of the nice flatti........i will come with news in the twinn soon,as some things on the drives,come in end from machining.....thank you all!! stelios.

[metalsak]

i already,choose two controllers roxxy 100 and other two roxxy 60 for the small future set ups....the look like .....schulze??????
but i like the small-compact dimensions....

[metalsak]

Hi....some delay on the project,but finally the drives going to be complete.
i take four spherical (polymer) joints from igus.de and i open carefully the hole from 3mm to 5 mm(the drives are 5mm on the back). those come in stiff tolerance,and get water tight for sure.

http://img24.imageshack.us/img24/526/j686.th.jpg (http://img24.imageshack.us/i/j686.jpg/)
http://img837.imageshack.us/img837/8586/5aqc.th.jpg (http://img837.imageshack.us/i/5aqc.jpg/)
http://img607.imageshack.us/img607/5957/be0q.th.jpg (http://img607.imageshack.us/i/be0q.jpg/)

[metalsak]

Because no body here in greece that have a cnc router,like to work with carbon....i find a solution that is very good in tolerances...i worh a lot with laser cut in my own business,and i find pretty good,to make my drawings for my projects,then to cut them in d.c.p soft metal....and then screwed on the carbon plate,and then "dremel it"
works great!!!!

http://img850.imageshack.us/img850/2743/68yp.th.jpg (http://img850.imageshack.us/i/68yp.jpg/)
http://img14.imageshack.us/img14/8472/07w9.th.jpg (http://img14.imageshack.us/i/07w9.jpg/)
http://img812.imageshack.us/img812/3536/7o9d.th.jpg (http://img812.imageshack.us/i/7o9d.jpg/)

[metalsak]

Yesterday whas my name celebration...and the drives,as they come semi-complete whas my present for sure!!! i like them a lot,and if they are too long,i think that i can milled them again??
but i have one hour for me yesterday,to look them,thinking of them, etc ...like a small boy..xaxa(i think that all ,from us here, have the same thinking some times)
i hope you like them.....

http://img855.imageshack.us/img855/6181/ye7t.th.jpg (http://img855.imageshack.us/i/ye7t.jpg/)
http://img823.imageshack.us/img823/7520/oa91.th.jpg (http://img823.imageshack.us/i/oa91.jpg/)
http://img818.imageshack.us/img818/5700/e2l6.th.jpg (http://img818.imageshack.us/i/e2l6.jpg/)
http://img706.imageshack.us/img706/8513/d43p.th.jpg (http://img706.imageshack.us/i/d43p.jpg/)
http://img689.imageshack.us/img689/6047/hc1z.th.jpg (http://img689.imageshack.us/i/hc1z.jpg/)

[metalsak]

http://img27.imageshack.us/img27/4498/wt5v.th.jpg (http://img27.imageshack.us/i/wt5v.jpg/)
http://img15.imageshack.us/img15/3748/3g1o.th.jpg (http://img15.imageshack.us/i/3g1o.jpg/)
http://img571.imageshack.us/img571/167/h2ct.th.jpg (http://img571.imageshack.us/i/h2ct.jpg/)
http://img585.imageshack.us/img585/5638/x01w.th.jpg (http://img585.imageshack.us/i/x01w.jpg/)
http://img11.imageshack.us/img11/6368/1q50.th.jpg (http://img11.imageshack.us/i/1q50.jpg/)

[metalsak]

Next part will be the rudder...
i have one ready....but now im thinking for one special,machined from me,as the look of the drives,worth something like this.
i will use twin mini servos,to activate this rudder.....savox sh0257 (if i remember correct)

[roundnose]

I'm really pleased to see this Flati on the water!

Go on!

*o* Werner

[metalsak]

many thanks!!!

[metalsak]

hi guys....
some late process on the flatti,but some time before some days,together with milling,gives this result....

http://imagizer.imageshack.us/v2/xq90/836/4wge.jpg (https://imageshack.com/i/n84wgej)
http://imagizer.imageshack.us/v2/xq90/690/l5pv.jpg (https://imageshack.com/i/j6l5pvj)
http://imagizer.imageshack.us/v2/xq90/163/a526.jpg (https://imageshack.com/i/4ja526j)

[metalsak]

and......

http://imagizer.imageshack.us/v2/xq90/594/h4q3.jpg (https://imageshack.com/i/gih4q3j)
http://imagizer.imageshack.us/v2/xq90/855/h959.jpg (https://imageshack.com/i/nrh959j)

[metalsak]

also the part that holds the rudder blade.
will be run on three inox ball bearings φ3χφ7χ3...
and how looks on the boat...

http://imagizer.imageshack.us/v2/xq90/546/ksti.jpg (https://imageshack.com/i/f6kstij)
http://imagizer.imageshack.us/v2/xq90/845/fbm4.jpg (https://imageshack.com/i/nhfbm4j)
http://imagizer.imageshack.us/v2/xq90/833/ax73.jpg (https://imageshack.com/i/n5ax73j)

[metalsak]

i like to use two mini servo in this project,just for the use of two rods instead of one...if i use one servo,even mini,there is no way to put two rods...so i think of this sliding part(is two parts) one for the servos,male,and one glued on the boat female...the servos will go far away back,and only one small screw(m2) will stop the sliding,but from a vissible area,with easy acess...is also a carbon part not ready,yet to hold the other side,and push the male on the female part...

http://imagizer.imageshack.us/v2/xq90/841/8k29.jpg (https://imageshack.com/i/nd8k29j)
http://imagizer.imageshack.us/v2/xq90/853/xm54.jpg (https://imageshack.com/i/npxm54j)
http://imagizer.imageshack.us/v2/xq90/802/8o21.jpg (https://imageshack.com/i/ma8o21j)

[metalsak]

some more photos from the female part......
the cut out from the alum. block its done with disc,as is very thin(1mm) .

http://imagizer.imageshack.us/v2/xq90/839/dwmf.jpg (https://imageshack.com/i/nbdwmfj)
http://imagizer.imageshack.us/v2/xq90/197/cvfo.jpg (https://imageshack.com/i/5hcvfoj)
http://imagizer.imageshack.us/v2/xq90/199/36a5.jpg (https://imageshack.com/i/5j36a5j)

[metalsak]

and how it looks on the boat...
the servos can have three configurations...face to face...bottom to bottom...and inside,or outside the coloumns.

http://imagizer.imageshack.us/v2/xq90/854/k8mi.jpg (https://imageshack.com/i/nqk8mij)
http://imagizer.imageshack.us/v2/xq90/703/sqmk.jpg (https://imageshack.com/i/jjsqmkj)
http://imagizer.imageshack.us/v2/xq90/822/q4ym.jpg (https://imageshack.com/i/muq4ymj)

[metalsak]

i have make them from 6,2mm diameter solid inox.
the final bigger diameter is in the boushings (5mm)
the diameter in the prop area is 3,17mm (1/8) as i use octura props
the drilling for piano wire 1,5mm
so why i get a bigger shaft...because first i make the piano dril,together with centre drill...and then from the oposit,where m3 nut work...
so i work all the shaft,from the centers,as i like to work in high speeds with no vibrations....but the machining must go with small cutting dephts.

http://imagizer.imageshack.us/v2/xq90/835/5gux.jpg (https://imageshack.com/i/n75guxj)
http://imagizer.imageshack.us/v2/xq90/541/bhuo.jpg (https://imageshack.com/i/f1bhuoj)
http://imagizer.imageshack.us/v2/xq90/839/z7zm.jpg (https://imageshack.com/i/nbz7zmj)

[metalsak]

and some more......
with a hard shaft,as a tool,with 1,5mm diam. and some cone,to drive and hold the shafts.
all the cutting process,is done with pressure hold on the shaft.
i like this type of work,as eveything turns on dead zero...
http://imagizer.imageshack.us/v2/xq90/811/qpde.jpg (https://imageshack.com/i/mjqpdej)
http://imagizer.imageshack.us/v2/xq90/534/egvn.jpg (https://imageshack.com/i/euegvnj)
http://imagizer.imageshack.us/v2/xq90/577/6wqd.jpg (https://imageshack.com/i/g16wqdj)

[metalsak]

i think that when i finish the rudder blade,and do some work on the robbe roxxy controllers,and before do oxidation to the alum parts (salt water mostly in greece) maby i can test the boat?

[Alex123]

Let`s go! I'm very excited.

Alex

[PSYCHO]

nice to see the good metallwork !

Regards Ralf

[metalsak]

thanks alex,thanks ralf.....
i whas wondering if is interesting,to see the machining.....or boring....

[Alex123]

The first: it`s very interesting
The second: great job
*pleased**pleased**pleased*
Alex

[metalsak]

hi guys......is a lot time to post here,and one reason is that there is no acess to image shack any more.(is the only way that i know)
the flat cat is almost ready,with the very nice,and smaller controllers roxxy (thanks for the recomendations)
the weight is close to 1370 gramms,and the centre of gravity, as my one motor flatti.
here you can see something from my "office" on the roof of my house.
https://www.youtube.com/watch?feature=player_detailpage&v=VVF_vNbnm5k

i will try to upload photos,in a diferent way.....if not, i want to ask,here,the forum,if i can upload from facebook??? thanks,stelios.

[Hans]

Hello Stelios,

Imageshack is one of the biggest malware distributors. When I click on a pic there, I get 6 alarms of system attacks. This is why we consider to ban all pics from them in future.


...i want to ask,here,the forum,if i can upload from facebook??? thanks,stelios.

Download the pics to your computer and upload them from there to the forum.
Use this button http://www.rc-raceboats.de/forum/images/editor/insertimage.png in the editor and follow the instruction.

If you get an error message, contact me via PM.

Hans

[PSYCHO]

Hello Stelios

the drives sounds very low noise .

Good work !

Now go Playing and dont forget to make a video ;)

[metalsak]

691336913469135the parts come from oxidation,an

[metalsak]

69136one bronze pipe Φ10ΧΦ9 to stop the ball end to move in front. it comes in contact with the hull,and is secure with loctite 648

[metalsak]

691376913869139ready for the flatti

[metalsak]

6914069141three stainless steel bearings,with a combination with one spring washer,to give a stiff movement,with no gaps....works very good!!

[metalsak]

691426914369144comes to the end......again......thanks for the recomendations,for those controllers...they are too small,and works powerfull..

[metalsak]

6914969151as my milling machine,in my shop,have a lot of work these days,i cut a blade from 1,8mm carbon. also the centre of gravity,with 2x3s 2,200mah scorpion power 60c

[metalsak]

69152the weight,is no small,but my one motor flat cat,whas heavier than this one!!! with two 2s 4,500mah nannotech.....but the power in this flatti,is tottaly a monster...i tested in my bathroom today,with two x430 cutted to 26mm and i cannot push the throttle fully as i whas afraid for my hand!!!!!the controllers logging,shows 43,267 rpm in the water.....when weather going good,i will test....video for sure!!

[roundnose]

Good luck for the Maiden Run!

BR Werner

[metalsak]

many thanks Werner.....

[metalsak]

today here we whas have a mini mono race,(alpha mini mono chalence) and also me whas race there.....between the three races,i make my test on the twin flatti!!!!
im happy for the moment.....this video is the real first,and the drives are down,and the props(x430 milled to 26 L+R) are too small.....after 5+ minutes the batteries are in 3,97 volts per cell....and everything real cool.
the second try/video is with the drives 1mm up....but with same props.
then the weather comes bad,and cannot test any more,with x430 standard L+R....
i think is good!! many thanks to the people here,that helps me!!!
http://youtu.be/Z9aNiYb00XQ

one more video will come......

[metalsak]

and a second one with the drives 1mm up.

https://www.youtube.com/watch?v=RJ9uymBLFRk&feature=player_detailpage

[metalsak]

hi guys!!!
finaly some speed videos,on easter holidays,in a small island here in greece. the weather helps a lot,and the water whas mirror for days.
here with the batterys far in back,and wheelies....needs bigger props,in the range of 32 or 33 mm with 1/8 bore/drive dog system......

http://youtu.be/2BCOQ0cGROg

and one more with "0-100" as i called it....im suprised how fast accelerates!!!!

http://youtu.be/J8Rs8E9jC0k

all the best from me,Stelios Sakantaris.

[metalsak]

hi guys!! the boat is finished and painted.A lot of thanks to all of you,for the nice comments,and help!The minimum that i can do for dr pshycho,is on the boat.....a lot of help,from him,and also good boats. My daughters find very indresting the plexi stand,and small fingers are welcome to our hobby!8035680357803588035980360

[metalsak]

and a video with my son before some months.....
the props here are 1/8 bore 32-2 cnc.....needs bigger as it looks from big run times and temps....
there is NO watercooling and comes with 30/35 celsius
next step 36/3 props cnc milled to 33mm

https://youtu.be/ezlRKdOBc7I

[metalsak]

80361Girls.......no comments!!!