jeff2wings

RCM&EDec 2003

So getting fedup with building models and not being able to fly them various resons ,thought I may as well mess around with a couple of mercos, the Mk III just needing a set of cylinder screws made,shouldn't take long.................... .........5 hours later 😕 just need to make 9 more short ones for three sets hope it doesn't take another 5 hours 😅 This Mk IV will be made up from leftover spares, I will be boring out the case to take a larger late model crankshaft

Do you have a base line rpm with the standard silencer? Otherwise it makes it difficult to assess the effects of the silencer and/or prop changes,

Four .010 's 😳 it's making my ears bleed just looking at it !!

The main issue is needle taper it should be less with petrol by upto possibly 50% I know when running methanol in my race bikes you would increase the mainjet almost double and different needles to the standard size, obviously a m/c carburettor operates slightly differently than of our model ones,a fine taper will allow a more accurate control of fuel flow necessary with petrol

Put it in a test stand and try it then you will know for definite, you can run methanol with with ignition to advantage but as this is probably about cost reduction try it on petrol as this is the pre-surpas model without the pumped carburettor

😄😄👍 oh,anodising, think it maybe a power supply issue but I'm not going to worry about it until w*nt*r sets in ! Interesting that the blue different intensity but the red is fairly constant ?

I would think once you have that as a pattern ED it's well within your skill set to scratch build one

Very nice, still not having much luck with my anodising ,are these any good for a marine conversion Ex Merco 61

I thought they band lead in paint decades ago?😄

Flair D7 restoration ready for maiden

Just re -tension the wires to hold it straight, you know, like they would have done on the full size a/c ? And if the lower wing is flat and the upper has a twist then you need to adjust the strut length

World Models Blue Max

So I'm not the only one here that's read the RM Propo book lol ! 😆😆

Yes,I know, the photos of both servos shows the drive is off one side so the flap bellcranks need to be the same way

Sorry kc should had specified flaps ,ailerons are always handed regardless of rotary or linear output

If you realy want a Merco Alec I have about 30 of the things most of which have been rebuilt think I can spare one or two lol😄

If using a linear servo then they should be the same way or if using one side of a rotary servo arm

Well done that man using two servos and four bellcranks 😮!

Nice one Alec,will be following this with interest, just had a quick look on outerzone at the RM plans and some great models there from back in the day but no big wig,l think I have the mag for it somewhere if I do I'll scan it and post it here

Don't get cellulose near foam it'll melt,just use thinned down PVA to attach the tissue, btw what size is the wire?

I think something like this would be better suited to a model of this size rather than a bit of piano wire, if these are any good to you p.m me

That's the major wing repairs sorted out, just the covering and attaching the ailerons but before I do that there's the issue of the discoloration of the wood to deal with. The natural finish polytex will expose the difference in colour quite starkly, looking around the workshop I found this In the previous picture of the wing tip repair I have applied a coat of the paint and sanded it lightly and I think it gives the appearance of being from one piece of fresh wood? Well it does to my eyes lol ! this is perhaps a better illustration Now back too fitting out the fuselage U/C on,simples! Servos fitted in the same position as it was received in,however with the engine it was nose heavy? The joggle, cheap and effective. Works this end as well So far it's cost £20 for the airframe ,a small amount of wood, paint/fuel proofer and covering that I had to hand

So now I need to make good the area formally occupied by the torque rods, I rebated the damaged area and added new wood Once the had set and sanded flush it seemed a good opportunity for a dual servo setup, after a bit of a rummage under the bench I found a couple of Hitec slim wing servos Of course having removed the wood that was covering the rods left a gap and both wingtips now repaired