Caveman

I have one of these ‘dongles’ and it works well. Make sure that the cables supplied are suitable for the transmitter you intend to use. In the past they came with a CD which contained several flight sims and other software and this is where there was potential for harm to a PC. The current items don’t appear to come with any software at all. Phoenix fc software can be downloaded, free of charge, from RC-Thoughts.com, see under the ‘Projects’ tab. GDB

Shaun, there is another Colibri plan on Outerzone, a 71" version from RCM plans. The COG on that plan is shown as 25% of chord. This is a snaphot of the wing plan. You can, of course, ask the designer on this very forum what he recommends! GDB

Dennis, if you look on the Just Engines website there is an exploded diagram of the 28 two stroke which is the older model with the round fins and head. It also has a gasket for the rear cover and two for the head, so it looks like they’re all like that. GDB

Indeed, someone has a copy of the plan and article! A scan of the plan showing the CoG position TN Lysander Plan.pdf An extract from the article, see bottom of column 2 for info. TN Lysander Article extract.pdf Hope that helps. GDB

Hi Wot, Galaxy kits are supplied by Pegasus Models, see here: Pegasus Models Norwich - | search results for galaxy Although the Domino is no longer listed they may be able to produce a set of wings to order - worth a phone call. GDB

Here's another video, this time in English. He swaps the gimbals and then applies the software change. GDB

Hi Roger, I think that your engine is even older than mine as it has the crank bearing, if that the correct term, bolted to the engine case at the front, whereas mine is a complete casting. The carb on mine doesn’t have the black shroud on the throttle lever side. I don’t know if that’s intentional or it’s dropped off or rotted away! In any event it seems to work OK so I’ll leave it well alone. GDB

Ha! Thwarted, the file size is too big and I’m not able to condense it at the moment. If it’s still relevant I can post it in a couple of day’s time. GDB

Hi Roger, is your engine the same as this, with the large ‘circular’ carb? It’s an SC61, quite old bought from club mate for £10. It’s a really good engine. I have it fitted to a Panic bipe, using a 13x6 prop. It picks up really well with no hesitation and pulls strongly. The fuel is (very old) Southern Modelcraft 5% and the plug is an OS no.8 I’ll try to add a video so you hear it in action. GDB

Google FS-B1700 battery, there are lots available, mostly from China. They seem to be 1600 mAh, but that shouldn’t be a problem. GDB

Hi Geoff, when I subtly reshaped the nose of my Multiplex Funcub so that no longer had the strength or shape to be functional, I decided to replace it. However, it was during the depths of the Covid epidemic and no-one had stock of a suitable replacement. So I decided to discard the fuselage completely and re-utilise all the electrics, the wings and tail and build a new fuselage from scratch. I carefully measured the remains of the original fuselage and drew up a plan for its replacement. As I had a large sheet of 3mm lite-ply in stock I used this for the sides and the bulkheads, balsa for the top and bottom sheeting and 6mm ply for the firewall. Inevitably the finished fuselage is a little heavier than the old foam one, but the 'new' one flies just as well as the original. It was well worth the effort and is a pleasure to fly - I think you're doing the right thing! GDB PS The wings have been through a few traumas as well - perhaps it's time to build some new ones 😁

This one caught my eye. I’ve got the 61 version of a similar vintage and it’s a really good engine. https://www.ebay.co.uk/itm/256427868592?itmmeta=01HR9CZXDMM0PQBE6PMARHV3BD&hash=item3bb44ac1b0:g:PrgAAOSw4e9l3wc5&itmprp=enc%3AAQAIAAAA8A9urEFJW9djzv1QzdLYONBiQtdhQlugna%2FOnbhwVwZLheen5e8aOID6k7VWESOlPVzrQ4cCAsU6FtVxATu1Wq4JilB%2F%2BwtOj67GJDiiIk3lv7YJlb0hdT2Ez559AwyPMw%2FxfgT9OxulsyEDJ48b4Q81IWBi801VJ24O4JrAhOJt6KSWoJKwdwDAJG0W8mgp1DMY4r9feTvX40Q06iafZImUOox9GZkRFSQ%2BroGKGoCBLp6r9VfOZiuTtNDVXCwq7DlCKSTkcDSi3KYjlCDhq1d%2FNlilAe9WW4Xmdr5Tcd78fWkzCET7jPUgCdMZiV40kA%3D%3D|tkp%3ABk9SR4rX_6zCYw Only a couple of hours to go until it’s finished though. GDB

Hoochy, for my money, 40 to 46 two stroke or 52 to 61 four stroke would be ideal for the Sky 40. Anything less would be under-powered, anything more would be over-powered. I would, for simplicity and reasonably low cost, suggest a 46 two stroke would be ideal. There are a few suitable engines on Ebay at the moment, both new and used. I would look at new and new (other) as there’s more chance the engine will be undamaged/badly worn. GDB

Neddy, I think that you are in Australia. It would appear that piano wire is also known an Spring Wire and Music wire in Oz. Have a look here - they sell 0.813mm dia. Spring Wire in 900mm lengths, which should be OK for your requirements. Spring Wire (Size Table) (hobbyparts.com.au) GDB

Neddy, your plane uses a pushrod system very similar to that used by Multiplex, i.e. a thin piano wire pushrod running in a plastic outer tube. My Multiplex Easyglider uses a linkage stopper, as you describe, at the control horn end (with apologies for the poor photo) - With a Z bend at the servo end - The piano wire pushrod is 0.8mm diameter, inserted into a close fitting plastic tube that in turn runs in a larger diameter plastic tube - you should be able to see this in the above photo. A piano wire of SWG 20 (0.914mm dia. ) would fit into the smaller tube. If you have retained the plastic tube then I would keep it simple and use a length of piano wire. Check what is the largest diameter which will fit with a good sliding fit in the tube and which will also fit into the linkage stopper, and use that with a Z bend at the servo. SWG 21 is 0.814mm dia and would be a direct replacement for the original. GDB