bodywerks

My Feedback: (4)

it should be able to. Guys are running 160s-180s and I've not seen mention of changing out the pipe.
I'm in a similar dilemma. I have a 140 and a 170. And I also have a 2m Rebel on order. I know the UF can handle the extra power, but being in the US, speed is limited, which kind of defeats the purpose of being ridiculously over powered.

Dave Wilshere

I flew mine with a hot 160 for 18 months and no one knew it had anything other than a 120 ( which with a JetCat is nearer 130N) then we were at a huge deserted airfield we get to use and I opened the taps on circuits rather than in vertical short bursts and everyone was wow what have you done to that!! And I just said use full throttle!. Someone commented they were surprised I hadn’t been tempted before to ‘show off’. UF does not need full power and here most customers would be put off watching it go so fast thinking “I can’t handle that...
You don’t have to use full power...people don’t drive Lambo’s at 200 all the time just because they can. Big turbines and vertical is what it’s all about, though the new JetCat P-130Rx which is 154N is probably the ultimate unit as it’s small and light, so the model flies even better.

bodywerks

My Feedback: (4)

Agree. The sw140b is about the same weight as the jetcat 130 and puts out about 14.6kg of thrust and I think that's what the UF will get. Near perfect power with light weight.
my buddy just finished a Rebel classic with a tuned down kt160 and it was only 10.6kg, so I think it'll be fine with the 170 and throttle management.

Dieselman1220

My Feedback: (25)

I got an SW170 to try out. Im impressed so far, it’s roughly the same size and weight as the cheetah 140 that’s currently in my Evo.

hotspot 01

I’ve had my 190 in my flash for a few years now derated to about 17kg the huge verticals are the fun part and getting out of the hole super fast 38 hours total run time airframe hasn't missed a beat.

bodywerks

My Feedback: (4)

just looked. I think the sw140 is actually lighter than the jetcat 130, and I won't mention price...

Dave Wilshere

Installed weight? Or raw turbine.
The JetCat is another kilo of thrust...

bodywerks

My Feedback: (4)

1255g turbine and mount only. Maybe 1375g installed. 100mm diameter. And all brushless with telemetry included. And only $1950us. I have 4 swiwins without any issue.
I'm sure the jetcat is the shizz, and I was surprised by its 'affordability' at $2580us. If a guy needs the extra kilo of thrust I can see them forking over the extra $600.

Dave Wilshere

The P-130 Rx has telemetry included too.
Twenty years and JetCat stays dominant in the U.K., Jet meetings would be 90% JetCat I guess and since KingTech has never become popular I don’t see these breaking the trend either. Price isn’t the first consideration here for most Jet flyers, it’s who is backing the product.

Dansy

My Feedback: (53)

And thats why you see lotssss of Kingtech in N/A and quite a few Jet Central....support is the best

hotspot 01

Turbines are regional well that’s what I’ve noticed over the last 21 years.

Dieselman1220

My Feedback: (25)

I remember reading earlier in this thread that the naca vents in the fuse bottom were not needed on the Evo. I noticed my fuse got quite hot while doing some engine ground runs. It was to the point that I could notice the paint turn to a different shade of red.
Im in the process now of installing an SW 170 and the tailcone looks quite big in the stock pipe. I think I will also cut out the naca vents while I’m back there.
While it may not be needed I can’t see it hurting anything especially running a bigger engine and smoke. I wanna be as nice to my pipe as I can.

Dave Wilshere

On your pipe how much does the outer pipe extend past the inner pipe at the rear? On the turbine you were using, what gap between the very back of the turbine tailcone and start of the steel tube at the front?

Dave

Dieselman1220

My Feedback: (25)

I’ll check the pipe later today, I am running the stock Evo pipe. my gap was about 1”. I also forgot to add i also got some scorch marks on my fiberglass tail cone. That had also never happened on my 2 previous flashes.

Dieselman1220

My Feedback: (25)

Looks like the distance between the inner and outer pipe is about 4.5 mm.. You can also see the burns on my nozzle. Wasnt happy about that on my brand new bird 😏

Dave Wilshere

That should work, and this is all with the 170?
What does the inner pipe look like colour wise? Photo of the turbine tailcone in the bell mouth? Any whitening around that?

Dieselman1220

My Feedback: (25)

No all this was with the cheetah 140 which I did 10 flights with.
I am now in the process of installing the 170.
Ill go back and double check and take photos in a bit but off the top my head no I don’t recall any white.
Ive never used any other method than my eyeballs to center the turbine in the pipe.
About 25 installs in various types of aircraft without any issues.

Dieselman1220

My Feedback: (25)

Here’s what the install looked like, I did have some small washers between the rails and turbine to better center it. I didn’t remember until after the photo.

Dave Wilshere

Eye ball is all I use, it was more the actual turbine to start of steel tube gap. I don’t know the turbine to gauge how far the tailcone goes into that carbon bell housing. To me the gap looks like it would be quite small unless the Cheetah has a very short cone.

Dave Wilshere

Looking at the airframe again it would benefit from the NACA ducts as there is less of an opening around the carbon bell to let air through to the rear section. The wing fills up part of that space and you are in a warm State!

Dieselman1220

My Feedback: (25)

Yes the cheetah has a short tailcone.
I just remeasured the pipe distance and it was 26mm.
The 170 is going to be at about 24mm.
I do this by taking a popsicle stick that snugly fits in the pipe and I butt it up against the carbon bell mouth then measure with the turbine installed.
I agree and will go ahead and cut the naca vents, as stated earlier it won’t hurt anything.
And yes it does get hot, it not uncommon for me to be out flying when the temps are 40 degrees C outside.
Thanks again for your insight DW, it’s always appreciated.

Dave Wilshere

OK, I would expect any problems with either of those numbers, so can only be the lack of cool air available

Stay safe.

Dave

AEROSHELDON

My Feedback: (99)

Where would the NACA be located?

Dave Wilshere

Here like on my UF.

Dieselman1220

My Feedback: (25)

It’s also in the original ultra flash manual on carfs website.