kev-o

My Feedback: (1)

One word

AWESOME

Your gonna love it
Kevin

Dave Wilshere

Stan

Yes...4lb one guy added, but he had small batteries...
My point was it does not really matter how much weight you add, just that you add enough. I have seen models destroyed where the guy was fixed on not adding much weight to the airframe. In the case of the Tutor it carries the weight well, the wing is very efficient, but its a draggy airframe too.
Anyways, as you say your weight is fairly normal.
Only thing you need to remember that seems to catch some out is the elevator is very powerful and it does not need a big "tug" on landing, smoothly feed in up on the round out and it will floadt onto the strip.

Dave

KC36330

the gold one just went on sale........... http://www.carf-models.com/public_ca...ant&proId=2296

Aquilon

Dear All,

I'm very close to end the assembly phase of my CARF TUTOR.

As mentioned on the CARF documentation, it is suggested to add some carbon reinforcement on the fuselage, around the rudder area :

Note
On the prototype aeroplanes there is a small amount of fuselage flex caused by the high
tail and leverage, this has not been an issue in the extensive flying program, but some
addition carbon tows can be added around the former position-take these down around
the fuselage sides to the four o’clock and eight o’clock positions

This modification is it mandatory? What's the feedback of TUTOR owners ?

I'm close to install the tail pipe, and I want to know if it's necessary to do the reinforcement before.

Thank for your reply.

Best regards.

Stéphane

kev-o

My Feedback: (1)

If you are doing the speed brake mod then yes lay in some carbon cloth to stiffen that area up but the 2 I built had carbon tow added from the factory in that area and seems to be fine.
Kev-o

Aquilon

No other feedback about mandatory to make carbon reinforcement on rudder area ?

I don't use speed-brakes on my Tutor...

Best regards.

Stéphane

Dave Wilshere

Stéphane

It is not mandatory that you do it. We have flown the Tutor alot without the added Carbon and its fine. But it is little work and does no harm if you have fibre and resin available. If you are adding smoke I would treat the rear former with resin to to oil soaking into this structure. (it comes back around the tail pipe into the rear fuselage)

Dave

Aquilon

Thanks Dave for your reply. Il will add it on mine.

Best regards.

Stéphane

larshkj

Dave, since you are here, a question for you

My Tutor's rear former is too large for the pipe. I can move the pipe about 3 mm up and own and side to side. Is this normal?

Lars

ps, thanks for the tip about the smoke oil soaking the rear former!

Dave Wilshere

Lars

Mmm maybe not that much, but there always has been a little too much clearance and the aluminium "cool" wall compresses over time. On the ones I have built I added hard balsa around the rear fuselage outlet in four sections to stop the movement 12, 3, 6 and 9 oClock

Dave

larshkj

Thanks again Dave. That's what I thought!

tucson

My Feedback: (1)

Hi Dave,

I am using your system of setting the servo speed in my 12x to deplore the gear doors and gear. It works great. I recently purchased the Tam gear failsafe to prevent a gear up landing only to find out that it will not work with my setup the way it is.

I can get the gear to come down on loss of pressure but the doors will not. I am using separate electronic valves, one for doors and one for gear.

Is there anyway that you or anyone knows how to modify the failsafe to work with my setup?

Thanks,

Stan

Dave Wilshere

Stan

Never been a fan of the fail safe units, it makes no sense to me. Slow leaks usually occur from new installations and you sort that out from new. Also during a models life like the Tutor, you put the model together when you arrive at the field, you pump up the system to put the gear down and stand the model on its wheels. Then you fuel up-chew the fat and decide to fly...when I go to fill the retracts up before flight I would notice if its lost a load of air.
Then in my mind the majority of air problems are sudden pipe bursts, total failure of seals etc. With the failsafe it just about has time to open the doors, not to put the gear down (if no gear doors just about time to break the locks) then you can't grass land either without ripping off the doors or out the dangly legs...
Its also more joints in the system, something else to fail etc etc.

My 2c [X(]

tucson

My Feedback: (1)

Dave,

Can't say that I disagree with your thinking, as I have never used them before in any of my models.

Someone gave me a guilt trip on this one and I decided to get one only to find out that it will not work with my setup.

Thanks for your input.

Stan

PaulD

My Feedback: (39)

At times like this, I think of this subject:

http://www.rcuniverse.com/forum/m_97...tm.htm#9758048

KISS...it guides how I build and assemble jets.

PaulD

dubd

Stan, Tam's gear fail safe "saved" the bottom of two of my planes. In both cases I had a leak in a gear cylinder (worn o-ring). I see it as a "do no harm" add-on.

tucson

My Feedback: (1)

dubd,

Did you use it the same way I want to use mine,with doors and gear running off two separate electronic valves using a 12x for gear door sequencing? It looks like the only way to do it is use a separate sequencer, and run the Tam fail safe unit to the sequencer.

What I would like to do is not use a sequencer.

Thanks,

Stan

dubd

Is the pneumatic kit provided by CARF necessary for this plane?

Dave Wilshere

Depends whether you have the required rams, tube and valves etc! Its a good quality package

Dave

kev-o

My Feedback: (1)

It's not a necessity but it's got all good hardware and it works really well if you priced it out separately it would cost alot more too.
Kevin

PaulD

My Feedback: (39)

Part of your decision should be if you want to use the Jet Tronics valves included with the kit. Probably 2/3 of the kit price is the valves.

The air cylinders used are just robarts and are readlily available sepparately if you want to "build your own kit"

PaulD

dubd

Just ordered a Tutor in the Snowbirds scheme. Really looking forward to this one!

Are these the Robart cylinders that you guys are you using?
http://www3.towerhobbies.com/cgi-bin...?&I=LXET28&P=7

Dave Wilshere

Yep. We designed both the Hawk and Tutor around these cylinders, they are fabulous units...

Dave

kev-o

My Feedback: (1)

hey dubd
Paul and i are planning on doing cali jets in the spring and bringing Snowbirds 2-3 with us get going on it the cylinders work great
chris makes an awesome transport stand (stratotanker) he is making mine up this weekend

kevin

dubd

Kevin, I'll have my Tutor at Cal Jets. I'll look into the transportation stand.

Which servos are you guys using for the elevator? I read Dave state that the 8711s don't fit.