Guys

Just finished a so so weekend flying the Flash at the British Nats show line, poor organisation this year made it hard to get a flight, so I only managed 5 flights in the two days.
One possible problem I will speak with Comp ARF about is that the retract/oleo pins were very hard and hence brittle.
I had a fast/messy landing on Saturday and braking harder than I would have liked skidded the aeroplane side ways on a very grippy runway surface and a pin snapped.
Only a tiny mark on the wing and tail tip as it was nearly stopped.
Looking at the pin which only took five minutes to replace it is very hard material. I replaced mine with 6mm silver steel which will give slightly.
This is worth looking at for anyone with the stock gear.

Dave Wilshere

be carefull if they give to much you could rip out the formers.
we experimented a lot with this sort of steel and even harder steel.

David, I have the same gear. What was the outcome? Did the gear bend or just snap the pin? I have never had gear with a pin like this. Is it a sacrificial point? If so I might get a few extras to keep on hand. Does altecare stock the behotec retract parts?
Sorry you had not such a great time. 5 flights is good for a warm up! hahaha!

Joe

Joe,

Mine came with a bunch of extras, didn't yours? I don't like that it snapped though - bending (with replacements provided) would be better...

Bob

Hi Bob,
I'm gonna take a look. That would be nice if it included some extras. Of course I'll be greasing every landing though! JINX!!!!hahah! This is really nice looking gear, I hope that comp-arf is not pulling my leg with the delivery date of sept.12th or there abouts. The reason I threw my money down for this plane was because the rep said someone just gave up their spot and there was a white one available. If it does not show up soon I'll consider that as bait. I love my comp-arf planes!~).

Joe

Joe and Bob

The gear was all fine, just the 6mm pin snapped cleanly.
I've spoken with the big boss and he hasn't seen any other problems. If we put in softer pins they could bend and the leg get caught.
Looking at my pin it broke where I had a flat for the grub screw, so don't go too heavy with the flat.
I'm going to put stock pins back in and not put such a large flat on the pin.
Thinking about it the flats are on the side and it broke going sideways! In line probably would not have been a problem.

Dave

Joe,

I can understand your frustration if its late, but after seeing mine, I can recommend that if yours is late that you wait - I think you'll be happy you did. This plane really looks good and I think it is going to be a blast!

Bob

Thanks Bob, that is the plan for now.

David are you using the C-36 retracts with the included components? I am a bit leary to run a one tank system but the gear kit looks very nice and well thought out. Have others used it this way? I will add a pressure gauge either way.

Sandor, can you post an installation photo of the Wren augmented pipe please? Any heat issues and did you cut out the NACA air inlets on the rear bottom of the fuse?

JOe !~)

Joe

Yes C-36 as it comes one tank.
No issues with air useage, it uses 10psi per flight, retracts and brake useage total with the supplied valve.
Don't fit a gauge...just somewhere else to leak!
If I pump mine up to 90PSI and leave it 12 hours I get three complete cycles without a problem.

Regards

Dave

no heat issues

i used the outer tube from c-arf for the heat protection.
the inner pipe is now connected to my tool shed , and is doing a fantastic job as a stainless steel rain pipe , considering its weight it will hang there forever.
what naca inlets? just did not do anything, i missed something?
the pipe fits perfect just ask sara to get you normal size one
if you need the exact size i can measure it up for you.
by using this system all the air can pass right thru and cool the fuselage.
you really can feel anything as the engine runs.
turn the engine off and the temp rises a bit.

Joe

Sandor did not use the full duct so he does not need the NACA ducts

Dave

I am expecting my Flash to arrive today!, What are you guys using for reciever batteries and switches? Is anyone using a power panel or electronic switch set up such as the Duralite powerbox electronic switch. I plan on using 2 -Li-Ion batteries (2800 Mh) in parallel for the reciever with a Emcotec Mini power panel, Is this enough ? I will be using 4 JR-8611's for the wing, and 2 -8411's for elevators. Also how is the included Brake / retract valve that comes with the Behotec gear. Should I upgrade the brake valve to a Jetronic unit? Thanks for any suggestions , Jack.

Jack

I use 2 x Thunderpower 2100 Li-Po with a Powerbox sensor switch, this gives me 7-8 flights

The std valve works very well.

Dave

2 x lipo kokam 2000 mah 7,4 for powerbox/emcotec
1 x Lipo kokam 3200 , 7,4 volts for turbine
1 x 1500 mah 7,4 volts for smoke system
perfect on CG
i use also jet tronics perfect no hassle with servo,s less weight,less chance on leaks

Thanks ,Dave and Sandor, I will go with the Emcotec mini power panel, and Lipoly batteries. I like your installation Sandor, is that real carbon Fiber on the tray or a covering? Sandor If I remember right you have the Wren SS in yours, Do you feel it is fast enough? what speed do you think it is flying at?, its hard to judge on the video. I am still deciding on an engine, considering these , Jetcat P-70 , P-80, P-120, and a Wren SS. Sorry for all the questions , I am new to turbines and this is my second Jet , I have a Savex L-39 with a wren 44 gold now. Thanks again Dave and Sandor for your help, Jack

before anyone bans me:
i CAN sell JC engines (graupner)
however if you compare there is no use to use a p-80
a Wren SS will pass it with authority in thrust to weight ratio and fuel consumption.
if you read back and build it thru my idea,s it will be a very light sportplane.
i was impressed about the speed , i think it will go as fast as a Rookie II with a 80N turbine on it.
P-70 is same weight as a p-80 .
P-120 is really fast , but then go for our Ulysses that is lighter in weight , more thrust , if dialed back to 120000 gives also 12 Kilos of thrust (cheaper to!).
the JC is about 3 times slower in acceleration then the Wren or our Ulysses

go for the wren you will not be dissapointed.
Speed: go for the ulysses (basicly a Simjet 3000 but altered in looks and electronics and more stuff for the buck)

the carbon is fake and plastic but lighter then carbon and looks good,and cost peanuts (12 usd incl the 3mm woodpart
i use cnc machines to make them , yes you could get one .
the trick is i cnc the plastic together with the wooden plate so it is light and rigid.
if you need stuff or emcotecs we also sell them
and i could make you a custom tray i charge 35 euro P/H
i allready have a Sample made so basicly you just need to tell me how you want the layout and stuff by drawing me a picture .
if you need powerswitches or anything just ask , i could make a copy easely
the plate as you see it now is 50 euro incl work and material.
you just need to fit it , it could be a tight fit but you will be happy afterwards.
and you have tons of space under the plate.

sorry cant talk to you about it , the rcu fbi is watching us[X(]

Jack ,
Where do you buy the Emcotec equipment in the US?

no its fake carbon it is plastic with 3mm wooden floor under it.

with the Wren it is more then fast enough and the airframe is very light with it.

speed could be the same as a rookie II powered with a Wren SS
since you are used to the Wren ecu , it might be easyer to stay with them.

Tothemax, I bought my Emcotec mini power panel from Desert Aircraft .They should still stock them , I got mine about a year ago. Good Luck, Jack.

Where did you get the fake carbon sheeting? Very Nice touch...

NICE JET YES NICE JET

RJE, I get that from dreamworksrc. It's is nice stuff and easy to work with. Looks great Sandor!

JOe

Sir's, I am putting together a Flash. Sandor, looking at your pictures, screw threads are very HIGH, as a professional builder, cut them off! Noticed you did not go with the full bypass? WHY? Wren is a good choice. The by-pass is a USA thing you think! My Flash is a full bypass P-70 Super Deluxe! Any comments! WHMC

screw heads? what screw heads

yes dont like bypasses , not needed for me.
always cause problems for me.
i like low weights.