rbgetz

Back on track. cutting the spinner was a bit time consuming but came out good. Azzam, I watched your video, looked great..

AKB

My Feedback: (6)

Hi Fellows
Just wondering how people dealt with getting the seal done right, with intake and the Jetcat SPT 5. Obviously the 4mm line that they provide with the kit doesn't exactly do the job for the P 60 core turbine with the amount of ID that needs to get filled in the fibreglass intake that is included in the kit. I have tried some 3/8" OD heater type hose, but that's not big enough. I have tried bigger exhaust type hose for glow but that just seems deform the fibre glass intake. Also don't want to install something that would get swallowed up in the turbine either.

Thanks for your tips in advance.

Alan

Dave Wilshere

Normal glow silicon fuel tube is ideal, it needs splitting with a sharp scalpel, but It should not be a problem.
Do you have a FOD on the turbine its self?

AKB

My Feedback: (6)

HI Dave
Yes I have bought a tea stainer and I have always had mountable FOD screen on the SPT 5.
After reviewing a lot of photos last night of Jetcats mounted on the Tucano, I see a lot of the installs don't seem to tight seal on the tubine intake. All they seem to have is the fibre glass tube sleeve over top of turbine.
Does it need complete seal from the intake to the turbine? Can definatley see it on the Wren's, but it has smaller OD then the Jetcat.

Thanks

Dave Wilshere

The issue is if the turbine can draw in hot air from the cowl area, a small gap does not seem to be a problem, if the tube goes over the purple cover it will draw mainly from the fuse.

Dave

phantom_najd

My Feedback: (2)

Do your best to have the intake completely sealed and draws no hot air from the cowling space... I have a SPT-10 and don't have this issue, but I know for sure that I will completely isolate the intake from the cowl area and have it only draw air from the fuselage if I had SPT-5 installed.

Azzam

AKB

My Feedback: (6)

Thanks guys for all your comments.

Alan

rbgetz

I noticed that with the turbine offset, the exhaust stack on the right is probably less than an inch from the fuse and the one on the left is much further away from the fuse at about 1.75 inches. I see now why some folks have more heating issues on the right then left. The exhaust I bought are cut straight, I was thinking of cutting the ends more of an angle to allow the exhaust to move away from the fuse more. Anyone have thoughts on this? The material is so thin, I’m not even sure how to cut without bending it… Any suggestions would be appreciate or if you know someone who makes custom.

DUCMOZ

It is hard to see but I am using Tam's pipes on Marchetti and they are cut to the correct length so you get even exhausts. also the ends are cut with angle. in any case, you can cut that material easily with Lexan cutting scissor. most hobby shops have them.

phantom_najd

My Feedback: (2)

I cut an angle in the right hand side exhaust stack to make it blow away from the fuse. I used a dremel with a cut off wheel. Used a masking tabe to establish a clear cut line and sneaked on the angle until I achived the correct one. It took me three tries to get it right and with the dremel and cutt of wheel it was very easy, fast and clean.

Azzam

rbgetz

Thanks guys, I think I'll try cutting them tonight. I did go look at Tamjets web and saw SPT-5 and SPT15, but no STP-10, which I'm running. Are the exhausts the same diameter as an SPT-5?

rbgetz

Thanks guys, I think I'll try cutting them tonight. I did go look at Tamjets web and saw SPT-5 and SPT15, but no STP-10, which I'm running. Are the exhausts the same diameter as an SPT-5?

phantom_najd

My Feedback: (2)

I have SPT 10 and I bought the stacks from Jetcat.

Azzam

Thruster

I got mine made by Grumania jets and had them made to sized to the offset

Would post pics but ipad not playing

rbgetz

Wow.. I just checked out the exhaust from Grumania. Really nice.

Dave Wilshere

SPT 5 and 10 is the same exhaust size. They should be off set lengths since TP always has side thrust
These Raven ones were made by Zimmermann for me. Also prop for the SPT-10 :-)

David Jackson

My Feedback: (15)

Hey Dave,
What is the diameter and pitch of the five-blade propeller shown in the above post?

Dave Wilshere

David

23 x 14

Regards

Dave

phantom_najd

My Feedback: (2)

Dave,

Do you think 23x14x5 will be a good choice for the Tucano?

Azzam

Dave Wilshere

We are going to try it on an SPT-10 powered version we are going to build. Its only from the Super Tucano really, but it looks cool!!
Spinner is only just large enough for the 5 cut-outs

phantom_najd

My Feedback: (2)

Looking forward to see the results. Thinking back about the time I spent marking and cutting the spinner for the three bladed prop, I know for sure that the task ahead of you is going to be challenging to say the least. I think skymaster sell precut spinners (5 blades) for their PC-21 not sure about the dimensions though. Please take photos and shre with us the method you use to mark the spinner. Good luck Dave!

Azzam

Dave Wilshere

I mark the spinner edge on the blades with a section of tape. Make a card board template that fits the blade working from the flat backplate. One or two attempts makes a good match.
Mark the cone with 5 points and felt pen the blade cut out. Chain drill inside line and Dremel to line...

Does not take long once the template is done.

Gonzalo38

With several people now using bigger turbines in their Tucanos (SPT-10, TP-60, etc....), how are you guys handling the excess heat that is produced in the turbine compartment ?

The front part of the plane is very tight already for a turbine like the SPT-5 and it tends to get hot, so have you guys drilled any new holes in the airframe in order to improve ventilation and reduce temperature ? I'm currently having problems with my SPT-5 and the factory is telling me that is due to high temperature (grease coming out from the seal in the front shaft).

Straightleg

I have a -10 in my Tucano. and have no heating problems. I also use a bigger prop for lower (output) rpm.
Look at attaced pics for my solution.

Gonzalo38

Straighleg.... that is a huge prop. Nice.

I was told by factory that the grease leakage is induced by high temperature in the turbine area and that I need to improve ir flow in order to help reduce the surrounding temperature. Unfortunately, there is not much space in the Tucano to open new vents.

In my Marchetti I made sure to increase the size of the bottom vents so I have a very good flow of air and my turbine has never presented a problem (photo attached).

I will keep digging into the problem and see how I can open some vents that don't make the plane look ugly.