Andy Stephenson

Early Irvines used imperial threads. If your engine is one where the muffler bolts on from the muffler side then it's a UNC thread. I don't own one of these any longer so I suggest you contact Just Engines, they should be able to advise.

Deluxe Materials own website demonstrates that it is impervious to 40% nitro. https://deluxematerials.co.uk/collections/building-finishing-products/products/eze-dope

Many thanks, I will do a search on Habotai polyester etc. I'm looking for a bright orange and a light blue for contrast. A suggestion, Eze Dope claims to be fuelproof so wouldn't it make sense, to apply the paint before applying a final coat of Eze Dope.

Looking at all the usual outlets, there's a very limited choice of coloured nylon. Can anyone recommend a supplier who has a real range of suitable material, dress fabric shops may be the answer but I would need to know what to ask for. I want to cover solid and open structures with the usual application of dope, fuel-proofer etc.

Modelfixings supply a variety of O rings, some specifically for R/C carburettors. https://www.modelfixings.co.uk/o_rings.htm

Oops, must have misread that but it still doesn't explain why it only weighs 0.04Oz.

I'm trying to see what the difference between the two versions of the .108 2 stroke would be as the SC108A-S at 733g and the SC180AR at 1530g that's more than twice the weight for the same capacity. There's not much in the descriptions to justify this, although I think someone had boobed because it says this equates to 0.04Oz.

The RIpmax flying team, as was, seen at the model flying shows, were known for putting OS carbs on their MDS engines to make them more reliable.

There's a couple of AM10s in the BMFA auction catalogue. https://nationalcentre.bmfa.org/catalogues

Bruce, could you post a link as I only get a message saying "Currently there are no auctions to display" https://bmfa.org/auction#!/

How about a brushed motor ESC?

I used litespan some while ago and I remember it being quite lightweight so I would think something more equivalent would be lightweight tissue over 5 micron Mylar to give a puncture proof stiff covering.

My cheapo servo tester won't work with dry cells in a spring holder and doesn't give a proper centre when used with NiMH pack. When I checked it against my radio, it was about 30% out. I think I might make my own with a pulse length read-out.

Back in the 1970s, I built a Gangster 63 with an HP61. It wasn't overpowered by any measure but more recently I put together a G63 Lite with an Irvine 53. The Lite's all built-up structure transforms to performance, even with strengthening modifications like all sheet tail surfaces and the replacement of the inset ailerons with strip ailerons as per the original. I find It's the perfect model for practising aerobatics with the CG back at 120mm and laterally balanced.

This brings to mind the TV advert for breakdown services where there's a race between various mechanics on an athletics track and the person that wins is brandishing 18 inch Stillsons.

The way I understand it is that if an engine doesn't have roller bearings at the big and little ends of the con-rod, you need a relatively high lube content, as this is where the friction occurs. I have a Bryson petrol engine which has those roller bearings and is OK on 100:1 oil content provided it's run-in and the oil is synthetic.

Sold

As a final thought, were you using a relatively old 3rd party receiver and an LBT transmitter, there is a known incompatibility between this combination that may have caused the flight problems.

VID20240918111533.mp4 For sale (may already have been spoken for) See attached video of it running.

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Could it be that the ailerons were plugged crossed and the effect was only noticed on finals?

You don't say what size they are or if they are connected in series or parallel. Your best bet is to get a 3s LiPo say 2200 mAh, this is what I use to power a 12V geared starter it has enough power to turn over large 4-stroke engines and it only needs charging a couple of times in a season.

This is what I use... https://deluxematerials.co.uk/collections/emulsion-adhesives/products/cover-grip

A wooden lining might be effective in jamming a metal cutting blade.

Can you, for instance, change the aileron differential using the rudder trim lever on a 16SZ. This is one of the many features it's possible to set up on open source radios or at least ones that came out of that thinking.