Topic: aerotech lancaster

thanks all for your replys but the plugs have blown while the engines are running but will try the enya 3s and hope this solves the problem, with an aircraft like this this price of plugs does not come into it as we need everything to be 100%.

cheers Robert.

If you are blowing plugs often you have the engines running to lean. All it takes to kill a plug is 1 lean run.

For a time, OS LA's were said to be loosing their chrome plating on the cylinder liner. Hope that this is not cennected, but taking the head off for a quick peek inside should find out, especially if the problem persists.

Th Chris Golds version at 90" and 16lb flies well on 25 FP engines, so you ought to have planty of power, keping all four going will give you stress free flying, so err well onto the safe side with the needle settings.

Weather  looks perfect today, Good Luck   

Stu k

I've always used OS no8's and never had any problems
may be you're running them to lean
are the engines are getting enough cooling remember you're working with four of them and by the time you get to the last engine the first two are running for some time and are maybe over heating

hi fingers
about flying the model maybe a few years ago i would have been up for it
it wouldn't have cost me a thought
but it's a big responsibility flying a big multi engined model and I'm not prepared to take the risk of the maiden flight
i hope it's tomorrow the weathers looking good

 

who's this fingers guy sounds like somebody i used to know,maybe he can flying it tor me.


cheers Robert.

i maybe after a few bottles of wine
there's two many engines for him to start
he'd end up with no fingers left on both hands

disappointed about  yesterday(Saturday) lovely day but no Lancaster  :(

maybe this weekend

Robbie would n't fly the Lancaster ,he said there was too many FW190's fling on the strip                                      Fingers

yes fingers and i was the one flying it for you.

cheers Robert.   PS. lovely flying aircraft

hi all re lancaster i am not happy with the cockpit canopy or the front gun turret canopy does anyone know where i can obtain replacements would appreciate any help.

cheers Robert. 

Hi Rob,
Dunno if this would be any good to you
http://cgi.ebay.co.uk/AVRO-LANCASTER-CANOPY-NEW_W0QQitemZ230087963575QQihZ013QQcategoryZ34056QQssPageNameZWDVWQQrdZ1QQcmdZViewItem

hi ally many thanks, just measured it to small.

cheers Robert

hi ally many thanks, just measured it to small.

cheers Robert

Is 310mm long enough???

hi aly, yes 310 is spot on !why!

cheers Robert.

is it flying tomorrow(saturday)

hi aly, yes 310 is spot on !why!

cheers Robert.

Hi Rob,
I have the Traplet Plan for the 1/12:5 scale electric Lanc. 98 1/2 span, I bought all the plastic bits too and hope to start mine soon converted with four OS 40s. canopy is good quality but this is the lancater B1 special with the "Tallboy" bomb mounted outside the modified fuselage. There is no nose turret on this aircraft, it was faired in to save weight as was the top turret. Wot you do get though is a nice canopy, glass nose (I think but I'll check when i get home) and rear turret.

https://sslrelay.com/s119033911.oneandoneshop.co.uk

Search for "lancaster" and it will come up with the plans, bits and everything else. Watch out though coz there are two sizes of Lanc - you want the bigger one. Hope that helps old chap 

just checked Rob, it comes with the glass nose right enough

many thanks ally just going to have a look now.

cheers robert.

hi all, update on lanc, just got the new plugs but due to a family illness test flight is on hold for the moment.

cheers robert.

thats good robbie
the winds in the north tomorrow 
i'm hoping to go to downhill beach to fly my gliders
so i'll not miss the maiden flight

Hey y'all,

already quite some years ago, I started building my kit of the Aerotech Lancaster.

Please find some pictures here : http://users.skynet.be/bk264625/Modelbouw/Lancaster.html

Unfortunately it only flew about 30 seconds. The strange thing is that the plane went up very nice. But at about a height of 40 meters, it laid itself straight and started to fly to the left (NOT ROLL !!) as in "flat" (never seen it before). I tried to correct by putting aileron and later rudder. Nothing helped. The model went completely the other way (following the wind) and didn't steer at all.  :( I had to pull back the gas so it went straight down into the ground. A lot of the plastic parts broke and also the retracts.

My dad did rebuild the plane (without some plastic parts) but my feeling was gone. Therefore the model is now on the bench for about 2 years already.

We tried to hang it on the ceiling of our garage to test the working of ailerons and rudder and we found out that it goes VERY VERY slowly. Even after different settings of degrees of 3 out of 4 engines, it is not working fine ... 

I'll need to retest it soon but I think it will not work...

Greetings,

Davy

Nice pictures Davy, looks well worth persisting and making it work.

hi davy, you dont say what wingspan or eng size of lanc. what is the weight and did you add any weight for cg.like the pics.

cheers Robert.

hi all started working on lanc again but serious foaming on the 2 outboard engs we have tried to cure the problem but no success,would be gratefull for any suggestions.

cheers Robert.

Hi Robert,
If these things were easy, everyone would have one!

Have to say that I have never looked at the tanks while the engines have been running, so I don't know how much vibration gets through to the fuel, but I have not had any real problem with engine reliability.

I would check the prop balance, but after that, I'm a bit thin on suggestions.  I seem to recall that there was a publish 'hint' in one of the mags about adding a few drops of something into fuel, that stopped foaming, but what it was... I can't remember   

As a matter of interest, why do you think that the problem that you have is fuel foaming??, If the tanks are full, there ought not to be room for foam to develop, and even when the tanks are only half full, I would have thought that the clunk would still be under the fuel level, at least sufficient to supply the engine.

Have you checked for pin holes in the fuel lines??

Hope that you find a solution

regards,
Stu k

I've had foaming but never had running problems as a result. Are the engines running ok?

If you are concerned about foaming one solution would be a small header tank, say 2oz. That way its clunk can never come out of the fuel until the main tank is empty. 

The answer to the anti foaming additive can be found on the Newcastle upon Tyne Website under hints and tips. Here http://www.geocities.com/newcastlemodelflyingassociation/

 Robert,
              Both my He 129..and small Canadair showed an amount of foaming,
          I don"t think it"s possible to fully stop them doing it..especially with a twin, it only becomes a problem...when bubbles are seen coming up your fuel line....ignore the foaming in the top of the tank...
            Have a look at the two inner ones while you run them..if they foam to the same degree as the outers..then it isn"t your problem.
    What props are you now using?  are you trying each engine by itself to tune up first?...are your engines "hard mounted?"

  Cliff 
 

hi cliff, yes bubbles are coming up the pipe, engs are hard mounted, foams with or without all engs running, no room for header tank, one outboard eng is worse than the other, tommy is coming here this morn so mabe 2 heads are better than one , will keep you all posted.

cheers Robert.

felt clunks may help, are the engines vibing? have you balanec all props?

hi all, after a lot of different tests this morn have discovered bad vibration on the outboard engs, any suggestions as the engs are solid fixed, props have been balanced. nb. not possible to fit rubber to the engs mounts.

cheers Robert.

run the outers on their own, see if the vibes are still there

MM, if props are properly balanced it suggest that the motors are out of balance.

Try putting a slightly out of balance prop on, and try mating the prop at different angles to Top dead centre. ie vertical, then horizontal, then diagonally, you may find the porp and motor then counteract each other??

Failing that what engine mount is it, built up wood?

Have you tried felt clunks?

Have you tried mounting the tank in felt/rubber etc to stop the vibes getting to the tank?

amasol or whatever it's called.

amasol or whatever it's called.

Anusol??? 

hi all yes vibes are still there if only one outer is running, no room to pack with foam, and cant fit smaller tanks,will now try different eng mounts, getting impatient for first test flight but dont want to risk it till i get this sorted,

cheers Robert

try the amasol treatment if all else fails, this can be got from car accessory shops, and a couple of sprays into a gallon will do the job,   

Is that big sprays or small sprays and what size sprayer do you use Alan? Ian

hi all yes vibes are still there if only one outer is running, no room to pack with foam, and cant fit smaller tanks,will now try different eng mounts, getting impatient for first test flight but dont want to risk it till i get this sorted,

cheers Robert

Been reading this with interest and had a thought that the vibration could be ground induced, try running the engines with the model supported at the wing tips, or with a couple of webbing straps around the wings and see if it's still there. Alternatively, run the engines until they cut out and see if all the fuel is consumed, if it is fly the model to the shortest run time you have got, if there is still fuel and the engines are cutting, convert it to electric.
Stearman

the amoral comes in a spray container,  just a finger pressure thing,   a couple of them, and thats it,   there is no set amount,

Thats Armourall, it's a silicone based cleaner. While it seems to work there are some that say it can cause running problems as the glow plug wire gets coated with use.