rrTV-PHOTO   New HD TV
HOME   rrTV-PHOTO   GALLERIES   MY GALLERY   HELP-FAQ
myHOME PM pmRR MEMBERS 763 ONLINE 73 EVENTS SEARCH REGISTER  START HERE
 
2 pages [ <<    <    ( 1 )     2     NEXT    >> ]969 viewsPOST REPLY
Next D . Futaba-RC . Fast Lad Performance

.
.
Got Jet Fuel? Turbine Helicopters > Jetcat
 
 
James
Senior Heliman
Location: california

My Jetcat topic re-opening

Hi every one i am curious about how long time wise should i fly the jetcat, before maintenance . I was told 25 hours , can anyone tell me what do they replace, this would be much appreciated.
thanks

cheers - Jim
. US Coast Guard
05-01-2008 04:48 PM
HOMEPAGE  
 
 
dazzaster
Veteran
Location: right next door to hell

mainly the bearings but they should last upto around 40 hours depending on wear and tear . they may replace other items that may wear down such as the o ring on the starter as they tend to not last long on the jetcat. they will also update the software version to the latest edition
darren

my wife is going to leave me for my best mate if i keep flying helis!.......shame ill miss him
05-01-2008 05:06 PM
HOMEPAGE  
 
 
SergioR
Heliman
Location: Portugal

Maybe because of our weather, here in Europe bearings and o-rings last for 50 hours on all Jetcat.

SergioR
05-01-2008 06:56 PM
 
 
James
Senior Heliman
Location: california

wow! thats a long time. Impressive

cheers - Jim
. US Coast Guard
05-01-2008 06:58 PM
HOMEPAGE  
 
 
James
Senior Heliman
Location: california

Hi Darren,
If im correct the first tune up of the jetcat is about $200 hundreds dollars is this correct. Or can you clear it up for me the coast for the first time for maintenance. I want to make sure i don’t go over the hours jetcat wants with out voiding the very first waranty check up. Any advice will help thanks!

cheers - Jim
. US Coast Guard
05-01-2008 07:03 PM
HOMEPAGE  
 
 
PETER ROB
Veteran
Location: Devon UK

JetCat service

James, It is a good idea to take advise from owners of JetCat turbines, and not from people who just like to post
The JetCat has a limited warrenty, for one year, and for the first owner only
"O" rings are a consumable and can be replaced by yourself
Service times from JetCat are not that specific, they recomend 25 hours for the first service, JetCat USA, recomend 50 hours,
I have found that the longer you leave the sevice time the more expensive it tends to become
The first service is a general check of the parts you send back, with the PHT3, it will be turbine with mechanics, the SPH5 it is the turbine and gearbox (fitted)JetCat like to strip things themselves,
Matt is the only one I know who sent back a PHT3 for the early service
I was told, by the then, UK Agent, that it does not need fixing until it goes wrong, so why send it back
One of my early PHT3's went 110 hours before the bearings started to rumble, since then all my turbines have lasted more than 50 hours, before they were sent back for service, gearbox's, on the SPH5, are a different matter, 2 have had to be returned at 30 hours, all the work was done free of charge, but they checked the whole thing before returning
A tip that was given to me was, to hold a small screw driver on top of a running turbine at tick over ( minimum revs)with one finger, if you get an electric shock sensation, your bearings are starting to go, another thing to watch is belt tention, if they start to go slack replace them, ( the belts do not stretch )and to date I have never broken one
Peter R
05-01-2008 08:05 PM
 
 
James
Senior Heliman
Location: california

Hi Peter,
this is some fantastic Information especially the thing with the screw driver. That makes a lot of since . I think i will wait until i hit 50 hours, before I get concerned. This is good information you are very knowledgeable on jetcat turbines and i appreciate this. I will print this information and put it with my jet cat manual.

I do have another question you mentioned the O rings how hard is this to replace. What needs to be done to replace these. Plus about the belt what should i be looking for, possible wear and tear, or should i not worry about that much?
Thanks

cheers - Jim
. US Coast Guard
05-01-2008 08:52 PM
HOMEPAGE  
 
 
PETER ROB
Veteran
Location: Devon UK

James, nearly all that I post are from my own experiences,
and having helicopter turbines since they were first imported to the UK, along with Peter Wales, makes us, I think the longest owning helicopter turbine owners, so have learnt a lot along the way
The "O" rings are a straight forward job to do, although can be a bit fiddley, the hardest part is removing the old "O" ring, on both the SPH5 and PHT3, you have to remove the starter motor, to access the "O" ring, remove the old, and replace with the new, no adhesive required
On the PHT3 it is a nut and bolt job, with the SPH5, there are a couple of solder connections to sort out
Leave it until you are ready to change one and I will post the whole proceedure, or the way I do it
Tip, buy a couple of "O" rings now and keep them in a safe place, when you need one it will be a hand, the second one is in case you mess up the first one
The belts do not show wear, they just seem to stretch a little, on one of mine, EC135, the belt flipped over and the smooth side was on the pully
Peter R
05-01-2008 09:19 PM
 
 
dacostad
Heliman
Location: Los Angeles, CA - USA

Peter, just a couple of corrections, For US jetcat owners, JetCat USA has a 3 year limited warranty and it is assignable or transferable to subsequent owners.

For the warranty to remain valid the engine must be returned to them for maintenance on or before the TBO of 25 hours or the warranty will become invalid.

Regards


David

Visit my website at www.scalereplica.com
05-01-2008 09:34 PM
HOMEPAGE  
 
 
James
Senior Heliman
Location: california

Jetcat PH5

Peter, it looks like three year warranty that’s sounds pretty good. I would be going to the jetcat USA for any work being done in the future. About the O rings i have the turbine PH5. Peter, do you know what the part number is by any change. I think your suggestion is a very good idea have them on hand. Question: how do you know when it's time to change it out?

Thanks Jim

cheers - Jim
. US Coast Guard
05-01-2008 09:45 PM
HOMEPAGE  
 
 
PETER ROB
Veteran
Location: Devon UK

David, I send direct to JetCat Germany, I looked at my original paperwork,in German, for the 1 year limited warrenty,I think their web page say's 3 years, I know that I have sent turbines which are over three years old and work has still be done free gratis, one of the early starter motors on No 072 SPH5, had an intermittent fault I sent it back with a PHT3 which needed a gearing change, and it has just been replaced, again free of charge, it looks like as long as it is a manufacturing problem it gets fixed, well done JetCat
James, The "O" ring wears out and the bendix (metal) rubs against the main shaft in the turbine, and it will not spin the turbine fast enough to start, you will know when it has worn out, there are 2 different "O" rings a soft one for the PHT3 and a harder one for the SPH5, you just tell them for which turbine you have,when you order I know, if you use the soft one on the SPH5 it only last for a few starts
Peter R
05-01-2008 10:54 PM
 
 
James
Senior Heliman
Location: california

The O ring



Peter is this what it looks like it was starter o ring product no# R1000 under turbine accessories. I saw it at the Jetcat USA web site and i found this picture of one is this what it looks like
thank you for helping me out!

cheers - Jim
. US Coast Guard
05-01-2008 11:19 PM
HOMEPAGE  
 
 
James
Senior Heliman
Location: california

David, it looks like when it hits 25 hours i should get it in so the waranty stays good! what do you think

cheers - Jim
. US Coast Guard
05-01-2008 11:31 PM
HOMEPAGE  
 
 
MattJen
Key Veteran
Location: UK,Gravesend, Kent

All the JETCAT turbines are 50 hr service inervals,

On the Jetcat Germany site which i would go by more than any oher ste it is says for their helicopter turbines

Wartungsintervall: 50 Stunden
in English =
Maintenance interval: 50 hours

I sent mine back after 30hrs as a bearing failed and so did the gear box - they replaced it free of charge as it was within the 50hr and under warranty with 36hrs on the clock.

The PHT3 is in my opinion the best turbine in the Jetcat range, it is very reliabl and starts on the button even on Gas.

Mine was one of the first few 0068, i sent it in after 25hrs and made the request to up date the software to 4.9 as i needed to up the head speed, mine was locked at 84000rpm, i needed 94000rpm, so that is why i sent it in, they did this, and at the same time replaced the belts ( mine had 6mm on the second stage pully) they upgraded them to 9mm, also replaced the bearing, all under warranty. they also do a bench test before sending it out.

the early ones used to be 25hrs, which is why JETCAT USA still go by that, but it is uneccassry and not needed, as the German site says now 50hrs, as previouse poster said the warranty comes with the machine even if it is second hand, as the new turbines have a chip in that lets them know how old the turbine is.

Jetcat is a good turbine,very reliable no flame outs, no worries about gear alignements, just plug and play.. i had some issues but that was my SPH5, which was 2 out of over 150 SPH5's.

My PHT3, was the best turbine, and that is why i am building one and going back to a HOTCAT.. with my own parts.

Matt Jenner

I bought my Mother-in-law a chair for xmas, but she wouldn't plug it in
05-01-2008 11:57 PM
 
 
James
Senior Heliman
Location: california

ok what's the difference between this PHT3 and SPH5 i just know my jetcat is brand new from jetcat usa this is were it was purchased at. Is the pht3 the older model? . I need to be updated with this please anyone. plus i need to go home from work and find out which one i have?

cheers - Jim
. US Coast Guard
05-02-2008 12:07 AM
HOMEPAGE  
 
 
MattJen
Key Veteran
Location: UK,Gravesend, Kent

PHT3 is a single stage turbine, ( has belts and pullies on)one on the left,

the SPH5 is a 2 stage turbine. on the right



Matt Jenner




the PHT3 has been out longer than the newer 2 stage SPH5, the differences between the two types of turbine is as follows, taken from previouse thread,
Single-stage and two-stage engines

The single-stage engine takes the power for the rotors from the shaft of a turbine engine. It is an effective way of doing things for model helicopters but isn’t appropriate for full-size helicopters, as it doesn't make use of the exhaust gases in any way and therefore wastes a lot of energy.

Two-stage engines were developed in full-size aviation to make better use of the power produced by a jet engine.
A jet engine uses the “suck-squeeze-bang-blow” principle and the hot gases streaming out from the exhaust provide propulsion (thrust). However, this is very inefficient and a large amount of the heat energy is wasted. So a method was devised whereby the hot gases were channelled through gas passages and used to turn a second turbine, which powered a turboprop propeller or helicopter rotor.
This gives three main parts to a two-stage engine:
First stage, the jet engine which generates the gases.
Second stage, the gas passage (interstage guide vane) and second turbine (power turbine)
Gearbox, with a shaft from the power turbine and reduction gears transferring the power to a prop or rotor.
Two-stage engines are about 4 times more efficient than the single stage jet engines, giving much more power from the same amount of fuel. That's why passenger planes started to use turboprops and now use turbofans, which are a further development of the same principle.

I bought my Mother-in-law a chair for xmas, but she wouldn't plug it in
05-02-2008 12:30 AM
 
 
MattJen
Key Veteran
Location: UK,Gravesend, Kent

in regards to what turbine you have,

if it is the one in your gallery (green) if you look at the front of the turbine there is a black box where the temp sensor goes from rear of turbine into this box, on it which says JETCAT PHT3,

you have the single stage turbine.and as you said it is brand new, you will have 9mm belt on the second stage pulley, plus the latest software. So you wont have to worry,about anything, and be able to concentrate on flying.

I prefer the PHT3 as you can change the rotation to Right or left hand rotation.

Nice machine you have there James.

Matt Jenner

I bought my Mother-in-law a chair for xmas, but she wouldn't plug it in
05-02-2008 12:39 AM
 
 
James
Senior Heliman
Location: california

Matt ,
This is so great you really know your stuff! Your explanation is impressive im still learning so much about these turbines, im like a sponge im learning a lot but i have more to learn about them. You have been very helpful. Matt i was told from some other people also, you think the PHT3 is the best turbine out of the Jetcat family i do agree other sources have told me the same thing. Thanks for the compliment on my jetcat i do appreciate that Go Jetcat!

cheers - Jim
. US Coast Guard
05-02-2008 02:14 AM
HOMEPAGE  
 
 
dacostad
Heliman
Location: Los Angeles, CA - USA

That's interesting Peter, there is a definite difference between the USA and Germany in terms of the hours and warranty period

James here is a link to a tutorial on how to change the o-ring. http://www.rcuniverse.com/forum/m_3.../tm.htm#3048465

I just ordered a couple of spares from Jetcat USA.


David

Visit my website at www.scalereplica.com
05-02-2008 02:58 AM
HOMEPAGE  
 
 
PETER ROB
Veteran
Location: Devon UK

Changing "O" ring

David, Good link,
I question the use of Cyno, it is not required, I have changed at least 10 "O" rings and never had one slip after fitting, also, if you start using any type of glue then it will make it harder to remove the next time,
Tip,SPH5, be carefull when you reassemble, the solder connections, the cable colours are the opposite to what you would expect, brown is not the positive wire
James,Stop soaking and get flying, you have a nice looking machine, the turbine is not going to let you down, like Matt I prefer the PHT3, but it is not suitable for all installations
Matt, Who changes the rotation?
Peter R
05-02-2008 09:10 AM
 
 
2 pages [ <<    <    ( 1 )     2     NEXT    >> ]969 viewsPOST REPLY
Esprit Model . Thunder Power RC . Real Raptors

.
.
Got Jet Fuel? Turbine Helicopters > Jetcat
  UPDATE SCREEN   PRINT TOPIC Advertisers 

Subscribe to This Topic

Wednesday, May 14 - 12:59 am - Copyright © 2000 - 2008 runryder.com | email | link to rr | runryder needs cookie