What is the word on the Flash.
How good is the flying?

I have one that is setup to just like the manual shows. No mods were done. The plane flies fantanstic. It tracks straight, it lands slow, it rolls axial. It slow flies very stable. I dont think I could have bought a better first jet.

I only have 16 flights on the Flash so I can't tell you how it will hold up over time.

I have a P120 SE for power.

I have seen Tony fly this jet and he is right on with it. The only thing he forgot to mention is after 6:30min of flying he is ready to land...

V..

Guys

My Flash was the first production kit with full ducting, it's 17 months old and standing up fine.
I have flown it in England, Ireland, Scotland and Wales plus Germany twice, flights are 100 plus with a P120.
I fly it from grass to with trailing link legs which are available from various sources.
With the wing tank and the P120 I fly 10 minutes.

Most people don't like the landing with a lot of flap, but the thick wing and 15mm of flap slows it up fine.

Dave Wilshere

Had my flash for over a year and still looks like new. Supplied retracts are excellent Behotec units, no need to change them for different makes but if you want to fly from grass then as Dave has done, a set of trailing link legs work well. Mine has a P80 and is not lacking with this motor and my timer is set to 9 minutes. Great flyer.

Trevor Skedge.

I finally got mine dialed in (and got used to it), and it flys great! Mine has a 120SE engine in it and I love the plane and the engine! If you go with an engine bigger than a P-80, get the wing tank. If you want to fly off of grass and don't want to go with the trailing link gear, simply modify the main gear and struts to accept 8mm pins instead of the 6mm. The 6mm pins WILL break on grass - its not a matter or if, but when. Its a simple mod. and then you are all set.

See here for the parts necessary for the mod:

http://www.rcuniverse.com/forum/fb.asp?m=6361459

Bob

Hi
Very nice aircraft.
The combination with a Hawk 100R, 11,5kg of thrust and the standard fuel cell 2,1l gives 9 minutes of flight without any problem. If you use the extra wing tank you could fly for 20 minutes!
You have a video taken from inside of the canopy here: http://www.hawkturbine.com/res/Movie...r2007movie.wmv
A small varning, the video is BIG! 147Mb.
I have flown around 80 flights with it after the WJM this summer. No problem with landings with flaps.
Maybe not the first modell because of the speed. But you have no hidden bad habbits in this one.
Best regards, and good luck.

Anders

I had a flash as my first jet and it was great. Get the CG right and it'll track well. Flew it on a P120 from a smallish grass strip. I used trailing link legs on the UC.

Running both the main and wing tank, I got 10 mins flying and lots of fun!

I kind of miss it now - I have a Bandit which flies great but the flash was so fast to assemble and get in the air with at the field. Do up 2 bolts, plug 3 airlines and 4 servo leads and you're ready to go!

That doesn't quite make sense. The main tank is 2.2 l and the wing tank is 1.4 l. How can adding the wing tank more than double the flight time??? [sm=50_50.gif]

This was an inside joke and I am laughing.

I have my timer set to start when I raise my gear. It is set for 9 min. When it goes off I lower my gear and land. I always have at least 1.25" of fuel left on the main tank.

Very easy...
A lot of fuel left in the 2,1 liter tank after 10 minutes I would guess that you do not have a Flash... There is a small problem to use all the fuel in that tank.
We have found out that we uses half the fuel compared to a JC P120SE or JC P120 at the same flying time and type of flying.

Look at the fuel figures here: http://www.hawkturbine.com/res/Hawk1...mance_test.pdf
and here: http://www.hawkturbine.com/res/Hawk1...litetslage.pdf


Thats how it is possible.

Regards
Anders

Can someone describe the 120N top speed and slow flight characteristics?? What's in the "bag of tricks" manuever-wise? Spins, snaps, tumbling events possible???

Thanks, Don Ray.

Hi
Not as fast as a Bandit.
But you can fly very slow with flaps extended.
I would say the ultimate aircraft, what you do is what you get from the aircraft except in one case (at least in my case, maybe pilot error...)
I have problem with the knife edge it will turn over on the back for me.


Regards
Anders

I hear it's a tree Magnet............. AAAAAHHH Got ya Olsen12




Hoss

Yes, I actually do have a Flash, with both a wing and main tank. I don't have problems using the fuel in the main tank, but I made a pleated paper filter pickup for my main tank that just about gets it all out.

As far as fuel consumption of your engine is concerned, its your engine and your data, so I'll take it with a grain of salt, but HALF the fuel consumption of a P-120SE?!? I don't think so. I read that the P-120SE was listed in RCJI as the 3rd most fuel efficient engine they've tested. Regardless, you'd have to be a genious to get that kind of improvement over a relatively modern engine without developing a turbo-fan...

As far as the Bandit is concerned, from what I've seen, the new Bandit ARF is not the same speed machine that the Super Bandit kit version is - but I will admit that I have not yet seen a Bandit ARF with a 120N engine in it. The Super Bandit with the P-120 is just about the fastest jet I have ever seen...

Bob

I fly a bandit ARF with a 23lb turbine and it is quicker than my flash was. I guess the thicker wing section on the flash helps slow it down but it still had good pace with a P120 in it. It also meant it was pretty versatile in aerobatics. They are really tough aeroplanes - I remeber not just me but lots of guys doing some really fast snaps and spins - then rebuilding the speed and flying on out.
As it was my first jet and I was flying from grass, I played with slowing it right up on landings and it never bit me. I did have some problems with it pulling in Knife edge but some playing with the CG helped to eliminate it.

Oh sure, it's a nice jet if you remember to turn on the fuel, plug in the servo leads and stay out of the tree's... ha, ha, ha... Got that Roger!

Bob, fact is:
High pressure ratio (3,75) and all parts very carfully designed and optimized makes the Hawk 100R theNr1 most fuel efficient engine ever tested in RCJI.
You have the test here and it is not our figures it is RCJI and Tom Wilkinssons: http://www.hawkturbine.com/res/Hawk1...reveiw_all.pdf

Compare the fuel consumption from idle to 75% of throttle with your engine and you will find that the figures are no hocus pokus! It is the result of many years of work, calculations and tests.
And the figures here are also from RCJI and also the published ones. http://www.hawkturbine.com/res/Hawk1...litetslage.pdf
The only difference with the Hawk 100R of today is that the maximum thrust is increased to 115N.

A small guess is that the time to consume 1L of fuel at idle is not 26minutes on your P120SE!
The trick is to lower the fuel consumption at all power settings not only on full throttle. You use the full power for very short bursts only when flying. Most of the time the power setting is between idle and 70 % thrust.
In that area the Hawk 100R is outstanding due to high pressure and a compressor that is designed for the engine only.
Belive it or not, this is the fact and the engine is available on the market!

You could try to not use the wing tank in your Flash and fly for 9 minutes! Possible?
The video on the web site is with the main fuel tank only. Look for your self.

Regards
Anders

Hey Hoss, it's those lead weights Roger put's in the nose of his Jets, they're not lead, they're tree magnets! Ha, ha, ha, ha just messin' with you Roger!

I have had my Flash for about 4 months now and boy is it AWESOME... I have flown some more expensive sport jets and have to say it flys as good as or better than the others...

Believe me, I have put the hammer down a couple of times and it can handle the punishment.... I think it has been close to 199.99 mph a time or two.

Anders,

I'm sure you produce a fine engine, but dude, 26 minutes at idle thrust, who the heck cares! My P-120SE is at idle during two times when flying my Flash, during taxi out for take off, and during taxi back after landing. You may fly your Flash at 0-70% the majority of the time, but with mine, I'm at 60-100% a majority of the time and if you look at the fuel figures YOU provide, at those thrust levels, you're WELL BELOW the 100% better fuel economy than any other engine you compare to (much less the newer P-120SE) that you claimed in your first post.

Again, I'm sure that your turbine is a fine piece of machinery, but originally I thought that your math was suspect and now I'm suspect about more than that... Personally, I think you should advertize your turbine somewhere else and leave this discussion for the pocket-rocket Comp-ARF Flash that the original poster asked about... YMMV...

Bob

Bob
I care, you are missing the point. I do not use idle when flying either, its normal.
Why dont you wait for the figures in RCJI.
You have a good engine. Just fly it with the fuselage fuel cell like we do.... No need for arguing here. Should be no problem if you are right.
Let me know how long you can fly on the fuel in the fuselage.



Regards
Anders

Guys...

Anders does have the most efficient turbine produced...that's fact, it's a different set up than all the other turbines which use more fuel to do a similar job.
Anders, I think you need to go to FJ to show the guys what you have- Bob its a nice turbine Anders and his team make...nice guys too.
But as I have said in my RCJI articles the way you fly and use the throttle has a big influence on fuel useage...pure figures mean little. I am very easy on fuel, with a lot of throttle use-I get 15+ minutes on my P160 Lightning and 10+ on my ARF Bandit P80...with Anders turbine I would get very long flights.

Don, to answer your question the Flash is a "Synergy 90 3-D" jet, a mix of pattern and 3-D, it's groovy fast (Anders use less rudder and more speed and the knife edge is easy) yet will turn very quickly. Snaps are best positive (up ele) with opposite aileron and rudder, spins are best inverted (down ele)-again with opposite controls it goes quite flat yet comes out quickly.
It different from my Bandits which are smoother, but not as agile.

Dave W

Dave,

I'm sure he makes a fine turbine - I said so twice. I just questioned how he went from 9 minutes on 2.2 l to 20 minutes on 3.6 l - it doesn't add up. The next thing you know, he's telling us how his turbine has half the fuel consumption than his competitor's newest engine. I don't buy it and I'm not sure this is the place for him to say it...

I do love my Flash though...

Bob

Bob, I bet you wish you would have had the flag below earlier.

BTW, The flash is an awesome flying airplane (mine had a Titan), just make sure the CG is right on or slightly forward, and this will make for an easier landing airplane.

George