richard cohen
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Posts posted by richard cohen
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sometimes you have just got to hold your hands up and face the flak....
so you've worked all through the night to fit bomb racks capable of dropping ordnance, the release mechanism and cables are routed, wiring and servos are in, the Tx is programmed with the correct switch but you when TX and model are switched on, nothing works. Being new to 2.4, i recheck that the Tx is set in the right PPM/PCM setting, the RX is powered up and all servo correctly connected, the aerials are properly routed. not a flicker of movement.....so i walk over to my Tx case to get out the instruction manual and there sitting pretty in its snug foam cut out....is the 2.4 module !!!!
funny how everything works much better now
hope it raises a few wry smiles
Rich
Edited By richard cohen on 15/10/2012 16:13:33
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weston pro synth 10%
super clean, and delivered free of charge when 4 x 5litres ordered and it works out as cheap or cheaper than model technics from LMC
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proper job, i wonder if he just tells the bloke ' don't mess about, just jump !'
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CS
have pm'd you details
Rich
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still a touch off topic but Mr Trubshaw was a customer of mine till he died. He lived in a nearby town and i serviced his car ! we also had the concorde pilot John Cochrane at our club when as a publicity stunt he was challenged to fly a radio control concorde built by a club member. He flew it successfully and we have photos on the club website
Rich
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ah, slow typing and CJ beat me to it
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sorry folks but its all a bit old hat ...google Colonel Joe Kittinger and project excelsior and look on youtube for footage
jumped from 103,000 ft back in 1960 - long before the possible consequences were fully known...on one jump he entered a flat spin rotating at 120rpm and blacked out - auto parachute saved his neck. Not to be put off he made other jumps and even loss suit pressurisation and had his hand swell up to twice its normal size ....eeek.
All altitude records and speed records but as it was military tests they stayed 'in house' with the USAF and didnt make official records but still got a DFC and is a cast iron legend in my book.
Not to take anything away from the new chap but its just higher with newer kit, full understanding of the dangers and better back up. Joe K just said 'i'll give it a go and jumped !
Rich
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tragic shame
. I flew in her for my birthday - wonderful old girl and one of my lifes top experiences.Sadly i understand it was always a chance occurance - caused by either fuel leaks or fuel system spitting back and setting the doped wings alight,
i did notice that with only 1 door there were escape hatches in the roof !!
Rich
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I have had a message back ref the half built model
' Hi Richard, not much help really, It was scratchbuilt by longstanding LMA member chris hodgson but was never finished as he is now deceased. but would presume so, its around 15ft span and quality built '.
not a lot of info to go on really but as I have my hands full with a 1/3 scale P51 its off my watch list but depending how long its been 'off the bench' it might need to restart the LMA inspection process all over which is a nightmare as covering might all have to come off to inspect the airframe integrity.
as for the Dornier, Peters right, this is the 3rd time i have spotted it listed - worth £5800 (apparently) and for sale at half price £1800 (half ? - Math fail ! ).
To most casual observers the model does look huge but again, a visit to an LMA meet shows it as average sized now and there are no real details on radio installation, redundancy, back ups, u/c etc.
Edited By richard cohen on 15/09/2012 19:42:28
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on the other end of the scale though are these beasties link or link...but why dont they put them on a dedicated modellers site like this one or on the LMA website for folk that know what they are looking at and what might be required to make them airworthy.
I have messaged the half built one just to find out if it is LMA registered for the build process and where it is in the inspection scheme but how likely is someone to take a punt on this sort of model ?
Rich
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all of the above are worth looking and even small airleaks can play havoc with running. With regard to sealing the needle valve, with nothing against KC, rather than use PTFE tape (which can pull into thin stringy bits ) i pick some fuel tube with a tight fit into the needle housing and an inside diameter tight around needle threads and cut a thin slice of fuel tube to make an o ring.fit it to needle, ease it into housing and it forms an airtight seal backing up the original needle seal.
Rich
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CM Pro Extra 330.....rushed to buy one once i had read the review, got it out of the box, beautiful finish to the model and went to together quite well. so far so good, took it for its maiden flight and then got met by 3 clubmates who all said ' not you as well, we all had one and all were lost within a few flights - best of luck ! ' ,......not the best recommendation but on i went with the flight. Felt better when it flew really well but on landing the slow 3 pointer that the reviewer carried out must have been with another model...it had to be landed like a jet fighter - power on and fly it onto the runway. it should have been called the CM Pro TIPSTALL... i persevered but it wanted to fall out of the sky at low speed, after several equally tense landings, it got sold.
the lesson ? read the review, wait till someone else buys one and then see how they get on first
Rich
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have a look at the waveriders Daady, the X43A scramjet. back in '04 it reached almost mach 10. but again it was a short burst flight without recovery of the vehicle
blisteringly fast but to build it to a passenger carrying size is likely to be impractical
ho hum, back to the venerable airbus's and boeings for us mere mortals
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well we know the design flies coz a full size piloted model was built for a channel 4 documentry back in 2001 ish and was flown by a glider pilot very well in front of the old pow's who built the original. Shame this flight ended in an 'arrival' to avoid pranging someones garden shed but it would clearly have made a nice touchdown with a hundred yards more runway - more proof of good old british ingenuity
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thanks for the replies lads. I used drinking straws to keep the aerial orientated and tonights flights started off cautiously but it was soon apparent that everything was cushty ! not sure if it is my imagination but the responses seem crisper and more positive - just me ?
i soon got used to not seeing the aerial but the Tx feels odd without the balancer of the aerial so i might try using a neck strap again
all in all, very pleased
Rich
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cheers lads
mind now at ease and first 2 Rx's in and working - but boy does it seem odd not having a silver fishing rod in front of my face when holding the Tx
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Tim, i'm not sure how big or colourful the model is (but i am guessing its quite small) but if you cannot find it by walking the tractor tracks listening for servo chatter then it is always worth seeing if the farmer is local and asking him to look out for it when spraying the crop or harvesting it. We have 2 rape seed fields along our airfield and several models have gone in. Some were found by field walking but others were located by offering a beer token to the tractor driver who was crop spraying who spotted and collected them. We even had one last year found 2 months later by the combined harvester driver before it got ingested. It was a fibreglass fuselage and turned out to be very water proof with no damage to electrics/servos/rx. I guess a foam model might fare equally well to a few weeks in the crop ?
In light of other comments, the only reason i dont fly leccy/foamie models is coz i dont understand electrikkery
. Having seen the range, detail and flying abilities of these newer models i feel i might be missing out at times. While I love the noise of a four stroke, the amount of support equipment needed makes me jealous of the speed and minimal needs of leccy models.Ignore the doubters, find yer model, and fly the wings off it and above all, have fun. (just fix the battery issue ! )
Rich
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evening all. Having saved up the pennies i have joined you all in the 21st century by purchasing 3 x 617 Rx's. I am mounting the rx on velcro with a tie wrap to ensure it doesnt shake loose but my question is aerial orientation. i know they need to be 90' to each other but is it the full length of the aerials or just to bare tips ? can i mount as per my picture where they run together and then split apart ?
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try sticking a pair of fins on the roof - if you have a mishap, tell them its a new experimental flying car design that you couldn't get airborne !
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Steve, well done so far. Just needs a little bravery and logical process, marking as you go. Just 1 other tip in case you decide to whip the valves out of the cyl head to do a full clean while engine is apart - the collets and valve springs are very small and very, very easily lost - even on a clean clear work bench - put the head into a large clear plastic bag and then dismantle - its a little fiddly being in a bag but trust me, when the collets or spring decide to fly out, its a few seconds to retrieve from the bag compared to searching all over the workshop floor.
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Chrissie, Alex Whittaker did an article on exactly thiswith brakes for club size models. (Sometime in the last 18 months i think - do you have subscription to check back issues online ?)
He experimented with small servos operating a curved brake shoe against the tyre. I suppose with a rotary knob control you could alter the pressure applied. I guess it could b a micro servo on the strut or else a single central servo with cable pulls to the shoes - i have played with the idea to slow up my bigger models but it is a lot of faffing about - probably easier to dial in spoilerons to dump lift/add drag.
He also mentions a disc of velcro glued to the wheel hub and the opposite glued to a disc on the strut and then the wheel collet adjusted to vary the amount of binding.
Rich
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thanks for everyones tips and after a lot of mistakes and curses
, i have got a finished tank. It ain't as pretty as some of yours but it's air tight !I used the metal from 5 litre thinners tins from our bodyshop. Couldn't find any suitable size commercial tins so I tried the 2 'U' shaped panels method without much success - too big and too much flexing. I ended up opting to make the base and 4 sides from one sheet folded up to make a box. I then tried Peter's tip of soldering in a ring to accept a standard fuel bung from a regular tank. When happy with the clunk position i soldered on the lid. This gives me 0.6 litres of fuel which should give my AU23 Peacemaker a decent 'stooging' time running a saito 120 FS. Now what else can i make out of plate and solder
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Very pretty indeed Tim, the light through the trees is lovely.....but with the current weather i can't help thinking it might look the same when we come up to Cosford in a few weeks. Better make sure the heater gas is topped up in the caravan !
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Cheers Craig, will browse the back issues.
Peter, the idea of a soldered ring to accept a standard bung is clever and i see the benefit of using a premade bottle/tin. I will have a look out for a suitable size tin.
If not, then cheers to BB for the link, Certainly takes me back to my youth seeing the lovely seam edges. Makes me tempted to make one anyway and see how it comes out
Rich
Why are we not seeing many twins
in General Electric Flight Chat
Posted
i always wanted a twin but the worries about asymetrical thrust if a motor goes out were a concern so i went a different route, an inline twin - Cessna 02 Skymaster. And the sound is even better when the prop wash from the front motor goes through the rear blades - always gets lots of attention and flies perfectly well on just one engine - i have lost an engine or run out of fuel on several occasions and it has enough power on one motor to do a few circuits before bringing her back in. The dead motor does 'windmill' so I do wonder if i added a remote glow if it would refire up - how cool would that be
(not as cool as keeping it running in the first place i hear you cry!)
Edited By richard cohen on 16/10/2012 20:24:29