Dave Wilshere

P-80SE isn't made...(don't pay any attention to their web pages)
The P180RX and P-200SX are totally different animals. P-300 and bigger are another ball park again.

I have just had a debate about P90RXi or P-100RX with a customer this afternoon. There are many things to consider. Totally different applications and needs from operating these two babies. I've asked him fpr more information before giving him my decision on which one he needs!

The range is perfect...

Carbon-Customs

the 200sx is almost identical to a P300, 150grams more, and 15mm longer, 2mm wider...


when will a P90rxi ever be a better choice than a P100 RX?

siclick33

It's cheaper.

It's easier to install with the pump under the cover.

It fits models designed for the P80 without having to make any modifications.

I haven't run my P100 yet or heard a P90, but the P90 spins at 130,000 RPM and the P100 at 154,000 RPM so I'm guessing (and I may be wrong) that the P90 is quieter and has more of a 'relaxed' sound (like the P80). I like the idea of this for certain scale models like my Mig 15.

Oh, and did I mention that it's cheaper [8D].

Carbon-Customs

yes i know the price, but apart from the price, it seems they just need to sell all the old parts for the old engines they have en stock...

well my P300 runs only 105k rpm... its not quiet

Dave Wilshere

When the model comes with a tail tube 85-90mm dia...P-90 is needed or change the tube

Cost is a big factor on both comparisons...so P-300RX verses P-200SX nearly 1000 Euro more, 10 week del (min)....no contest

The installed weight on the P-100RX in some models makes it a big plus. I'm just finishing my second GJC Mig 15 and with a P90RXi it would be at least another 500g heavier. If I was Darren I'd be P-100Rx all day in a BVM Mig 15.

Carbon-Customs

ok, but when you can fit a P90 you could just plug in a P180rx and then adjust the power output?

i know its another price, but its also the better allround engine...

maybe its just me,, i would rather pay twice the money, and get the best option, than save money and get second best.

Dave Wilshere

Not everyone can justify the quite large cost difference...

In a P-90Rxi size model a P-140Rxi is often the perfect choice, but not everyone sees the benefit and justifies the cost.
JetCat make the turbine P-90Rxi to help starters in the turbine market.

Anyway, no need to examine the reasons...to many they are clear. P-90Rxi is a good turbine choice.

Dave

DrV

My Feedback: (2)

I was trying to decide p-90rxi vs p100 in a BVM bandit MKII. I finally ended up ordering a p100. It is lighter, much smaller and more versatile in many other airframes. The eflux velocity is greater then the p90rxi but the later has greater mass flow which means it will hold "torque" on turns and verticals. P100 with greater eflux will win on straight aways so to say. The other negative of the p100 is that its more costly to repair/service secondary to more costly parts and labor. P90rxi parts are much cheaper and available.

I do think the p90rxi is a good choice to have on the market for those that want to get into jets with limited budgets.

My opinion.

xmen3k

Hello,
Could you pleas open diffusor and make a photoes of it, very intersting what is construction of it in jetcat

Jamie C

Has anyone one been using one of these regularly? any issues with the internal pump set up? any comments? would be interested to hear what people have to say about it.

Thanks

Jamie

Dave Wilshere

Pump is user replaceable if you had any issues, long as you keep line to turbine short as possible (no header tank in nose and turbine in tail!) you could ask someone who had sold quite a few now

First one I sold before Xmas has quite a bit of flying now.

patrnflyr

My Feedback: (7)

Bringing up an old thread but I have a question. I've read the manual about priming the pump but all the instructions are for the RX where the pump is on the outside of the case. The manual is the generic "RX" one and leaves a lot to be desired. I need to do an initial pump prime to get fuel to the turbine. Any hints or does it just suck it in without any vapor lock. Thanks for your help

furloughed ual

My Feedback: (31)

I had an internal pump JetCat. To prime, I just pulled the fuel line from the turbine and connected it to my fuel jug and " de-fueled". That will prime the line to the turbine. Connect the line to the turbine and start as usual. That will prevent the fuel in the pump and internal lines from flooding the turbine and having a wet start.

Dave Wilshere

Never had a problem priming from dry. I've run a few P-90 Rxi's and the small amount of fuel in the turbine from the factory run didn't cause any noticeable flame, I primed the line until it reached the case festo and stopped, then did a normal start which always completed.
I guess if you have a really long line you can suck some fuel along first.

Dave

lxfly

Agree with Dave, same experience.

patrnflyr

My Feedback: (7)

I installed the turbine today and it fired right up. Seems pretty powerful for my Elan but we took out a 140RX which will be used in another plane. Thanks again for your help. JJ

Dave Wilshere

Brilliant.

Dave

model1258

I have hade a 90rxi for couple months just getting ready to put in my 2m viper this weekend,I wondered why it didnt come with fuel filter because it built in. I knew it had built in fuel pump. what do you guys think about it in viper?
Robin

Dave Wilshere

Robin

I test flew a JL Viper with a P-90Rxi in the summer, it flew great, test flew another on the same day with a Merlin 100 and little difference in the handling.

Dave

model1258

I am glad I ran across this thread, I was wondering what my options were to get it primed up close to the engine for first start, I like daves idea just run prime till close to engine then go to normal start.Also I was wondering about fuel filters in these turbines because I live in Indiana and flew my p100 on my tornado 50 flights this summer and took filter out to look at it few weeks ago and was perfectly clean I filter my fuel before putting in plane but was still surprized to see how clean it was,
I also thought about putting regular jetcat filter between UAT and P90rxi but another person did that and was loosing RPM and after reading other people fuel filters inspections if you filter good before plane it will be stay pretty clean,
Robin

Dave Wilshere

There is a normal JetCat aluminium filter under the cover "sealed" with heat shrink. If you need to clean a filter between services, you have other issues. I've not opened or cleaned (or had a flame out) in 10 years. Clean tank and work towards the turbine with cleanliness. (You CANNOT clean out a moulded tank with an airline) I use alcohol or brush wash terps.

You don't need another filter. If you lose RPM, the pump voltage goes up...check the tank pickup and vent. That clear...then you can remove the cover and take-out, clean replace the filter. Run a new model, third or fourth run note the pump voltage and that it reaches max rpm quickly (no creeping up to it) log that and start flying.