FILE IFR

That's my plane in the photo....

I can give you better pics tonight in an hour or so. By the way, I did the NACA scoop only because I have a 1 Liter (old style) smoke tank installed. I wanted to be sure the engine (P-80 SE) could breathe freely.

cassiemitch

great !   thanks , i am using the 1 litre smoke tank also .

seflyer

My Feedback: (12)

I made a few hundred flights with my Reaction with a P-120 and did not install the NACA duct, there were never any issues breathing. ironically I sold it 2 years ago and it never left the shop and will now be mine again, so looking into an alternative powerplant, thinking my P-60 would make for a incredibly light and slow fun plane.

Kevin

DrYankum

My Feedback: (11)

I've gone through this entire thread, and unless I've missed it, I haven't seen anyone using a K-80 in the Reaction. Anyone have experience with this combination ?

DENTO

I have used a PST 800 No problems ,mind you I now have a Jetcat 160 no problems with that Ether

mavrick

My Feedback: (1)

HI.
I used a K80 for just on 20 hours flying of grass before I put my 140 in it, the 140 is a far better option unlimited verticals and much nicer to fly
Cheers
Mav

paulhat

Hi all.

maidened my reaction short nose on the weekend.
overall it went really well. I set the cg at 15.5 cm and it didn't feel at all tail heavy.
power comes from a kingtech 140 and i have put a set of electron retracts in it.
These are my first electric retracts and very happy with their performance so far.

This is the first model i have ever flown that needs zero elevator correction when inverted.
felt quite strange at first actually. I have never flown a pattern plane before but i reckon the reaction would give one a run for its money . Well maybe not but it does fly nice...

Probably my only regret was not putting the speed brake on. Sure i have to get used to landing it but the 140's idle thrust kept it in the air for longer than expected. Maybe crow braking would help. has anyone tried this on a reaction?

Flight time was about 8 minutes and i still had a quarter of the main (3.8l) tank.

Flaps make a cool whistling sound when lowered. Love it

Would recommend this plane for sure. Have had an Elan and Baby Boomer and the reaction is about as easy to fly as these two.

Regards,

Paul.

steve2972

My Feedback: (2)

Just finished mine,ready for maiden flight.P100,Electron retracts/Pro link struts/wheels/brakes.Came out at 25.5lbs dry with no weight added.CG set at 15cm approx.

PaulD

My Feedback: (39)

Crow works really well to slow down Reactions and there is really no adverse effects. I found I actually had to keep power on as the combination of crow and flaps added a lot of drag. Give it a go, I think you'll be pleased.

PaulD

paulhat

Thanks for the feedback on the crow breaking PaulD.

I will give it a go after I have had a few more flights on the old girl.

Regards,

Paul.

more

I use a kingtech k80f.Just maidened last weekend.Dry weight is about 11 kg.In my opinion ,This spec. is nice for a beginner.If you used to fly with fast sport plane before,you feels it's a little bit slow.



http://www.youtube.com/watch?v=E2Sta...yer_detailpage

http://www.youtube.com/watch?feature...&v=VHUBZrSF3hY

more

My pictures.

paulhat

Nice reaction pictures there mate.

Just wanted to report on my experience using crow breaking on the reaction.
Tried crow for the first time today and did 8 landings with crow active.

Here are my initial observations -

Definately helped to slow the model down. I had zero wind blowing and touching down where I wanted seemed easier.
Aileron sensitivity was decreased by about 50%. I think it would be good to reduce expo in the landing condition (this is the condition I have crow on).
Elevator sensitivity was also decreased. Maybe by about 30%. This caught me out a little at first and I ended up over correcting a bit. After a few flights had it sorted.

Overall I think crow works great. With a bit of fine tuning it should help alot here. We have hardly any wind in the mornings which is when I usually fly.

On another note I now have 40 litres of diesel through the K140. I am using mobil DTE light oil. The reason I am trying diesel is that its so hard to get jet fuel where I am living.
I am pretty pleased with the performance really. Starts take a bit longer and when you shut down there is a bit of white smoke. Apart from that it runs perfect. I was really worried that
there would be that horrible diesel smell but its actually quite the opposite. Hardly any smell at all. One thing I would say, if you are thinking of running diesel, make sure you try it on the bench first.
The ECU default parameters work fine with kero but not with diesel. You will get a mighty big flame out the back at startup on default parameters.

Lightningmcnulty posted these parameters in the Ultra Flash build thread. They work great. Perfect starts every time.



Regards,

Paul.

paulhat

Another 5 flights on the Reaction today.
Have decreased the amount of crow by about 25% and am quite happy with it now.
This plane really grows on you the more you fly it.
Have about 25 flights on diesel now and the K140 is still going strong. Will be interesting to see what the verdict is when I get it serviced.

Paul.

Boomerang1

Hi Paul, your comments on the DTE use is interesting.
I'm using it as well.

There's discussion on DTE in the Kingtech forum, probably worth a look
if only for warranty reasons. - John.

paulhat

Hi John,

Do you have a link to that forum?
Had a bit of a look around but couldn't find it.

How is the DTE going for you?
Are you running diesel as well?

Regards,

Paul.

Boomerang1

Here's the link to the Kingtech thread.

http://www.rcuniverse.com/forum/m_11...m.htm#11344288

DTE is going great for me, run it in 3 Wrens but my Jetcat is on turbine oil at the moment until it's out of warranty.
Jetcat specify turbine oil or their own oil.

Not on diesel (using jet A) but a guy's running it in a Wren 44 which I'm watching with interest. - John.

paulhat

Thanks for the information John.
As with you the DTE is going great for me. I will continue using it until I hit 20 hours and then send the engine back to the factory for inspection.
The whole diesel experience has been an interesting one for me.
To start with there is a bit of messing around with ecu parameters. Once this is sorted it starts and runs as normal. In fact I think it runs better than on JetA1 but that's only my opinion. Nothing to back this up.
Only down side I can see is the smoke that comes out on shutdown. No big one I guess.

Once again thanks for the info.

Paul.

E.N.T.

My Feedback: (1)

Which parameters are you using for crow?


E.N.T.

Edgar Perez

My Feedback: (13)

All,

I recently got a long nose reaction. I'm experienced a sudden nose down condition when landing with full flaps. This causes me to quickly, and sometime over correct, which put me in a bad spot (speed, height) for the landing. This never happened to me with the short nosed one.
In the clip below, you can see the effect at around 1:38 sec.
I do not use any crow.
CG is as per instructions (15.5cm from leading edge)
Flaps are at 60 degrees.
Not sure if I have a CG issue or just too much flap.

Ideas?
[youtube]http://www.youtube.com/watch?v=_4smdWwdD30[/youtube]

BluFox

My Feedback: (10)

hello Edgar. . .and Happy Holidays to you.

I will maiden my short nose PST reaction on Friday. Cheetah powered and using diesel with Amsoil Dominator at 2.5%. Looking at your video, about the only question I have which may help is what does it do inverted; hands off? Usually a tell tale sign of CG and what is needed.

I am going with the same CG and will use 15 degrees for TO flap and 50 degrees for landing flap. Mine is built completely stock with no additional weight needed other than what was glued in the nose at the factory. I am not using the speed brake nor crow at this time. I suspect crow will be added after at least five good solid flights.

Open for any advice from PST short nose reaction owners as to their final set ups.

Thanks for reading,


Eric

ricardinho

it may be a little on the too much nose heavy side.i generally like slight nose heavy but to much will cause the extreme down nose when hitting landing flaps...also you may want to take out about 20 degrees off your full flap...too much full flap will take away from your elevator making it hard to get the nose up...try setting 40 to 45 degrees on full flap along with a little crow...and most of all check your cg again...pat

BruceTharpe

My Feedback: (1)

Edgar, I hate to muddy the waters, but in my opinion it looks like the model may be slightly tail heavy. This shows up as pitch sensitivity during landing approach. I suggest adding 2-4 ounces of lead in the nose and see what you think on the next flight or two.

Edgar Perez

My Feedback: (13)

All; thanks for the ideas. I will make some adjustments and post results.
The model flies fine with no obvious tail or nose heavy symptoms . The pitch down is totally uncomanded.

paulhat

Hi Edgar,

Have watched your video a few times.
It was quite windy on the approach.
Maybe the wind just caught it for a second?
You recovered well and it flew the rest of the landing fine.

Paul.