Martyn K

Reminder that this event is on for next Sunday, the 21st May. Admission is £10 for pilots. Spectators and helpers are free. Hope to see you there.

The BMFA North West Area in conjunction with the Shropshire Model Flying Club will be holding the 2nd Annual Scale Fly-in on Sunday the 21st May 2023. This is a fun event catering for all types of scale models. Prizes awarded for the best turned out model, the best pilot and the best 'small' model (approx. .30 ic or equivalent electric). BBQ will be laid on. Numbers are limited so please pre-register by email: [email protected] Location: 52.74291922604198, -2.8517608708386883 SMFC entrance gate – What3words location : ///cackling.distilled.fears Google Maps: https://www.google.com/maps/place/52°44'34.5"N+2°51'06.3"W/@52.7432283,-2.8539447,1325m/data=!3m1!1e3!4m4!3m3!8m2!3d52.7429192!4d-2.8517609

UK Classic Aerobatic Association The UKCAA will be holding 5 events in 2023. Details will be published in the UKCAA events forum. For 2023, there will be no membership fee. We are having a free year. 🙂 If you would like to join, please download and return our membership application form from: http://www.ukcaa.org.uk/Club/Joining.aspx Note that we have now moved our members database to the BMFA Members and Club portal. The required email address on the form must match the email address on the portal. BMFA membership is mandatory. While you are at the UKCAA website, have a look at the plans and articles that we have provided. http://www.ukcaa.org.uk/Club/Plans.aspx and http://www.ukcaa.org.uk/Club/Articles.aspx All under 'Association Information' dropdown..

Thanks all. That appears to have worked. I proved it by binding in the order selected. One thing that i had to do was to connect them separately. I initially tried to bind with the satellite connected to the s-port on the rx8r. That didnt work. Next, I bound them as suggested, individually. To prove they had worked, i then powered up the receivers individually and they both appear to still be bound, i still had telemetry on the rx8r amd when i connected the satellite, the lights indicated that it was bound. I originally was expecting to see two receiver options in the setup, perhaps rather naively. Great result, many, many thanks

Thanks for the thoughts and suggestions. To answer Phils question. Only one receiver shows up (the RX8R pro) when I bind with telemetry on channels 1 to 8 as normal. I cant see or undetstand how to bind a second receiver. It may be that the 2nd receiver binds automatically as it is plugged into the first but if so, there is no way that you can then set the telemetry or failsafe for that receiver. Perhaps if i try binding the slave first then something may happen. I dont want to put the rx8r at the rear of the fus as that would mean long extension cables for power and the servos plus the real problem of accessing and managing that receiver. I am starting to think that perhaps opentx doesnt support this scenario, its only supported in the frsky proprietary software.

Hi all Horus 10S Express Transmitter with OpenTx Rx8R pro Receiver 1 R-XSR Receiver 2 I need to fit a satellite receiver (R-XSR) to my existing Rx8R Pro as the main receiver is shielded by all the metal panels. I understand from T9 that this is possible. The R-XSR is connected to the Rx8R Pro using the SBUS channel. I can bind the Rx8R without any problems but I haven't got a clue how to bind the second receiver and (apparently importantly), disable the telemetry from the R-XSR. Any suggestions please? I have googled and failed. Thanks Martyn

I am off to Malta for the first time in early May. 4 days in Malta, the rest on a short Med cruise for my wife's 70th birthday pressie. Quite looking forward to the Malta bit. I would pass on the cruise if I could although most days we are on dry land so that is some form of redemption.

That looks amazing...

Very interesting Simon An how-to article for RCM&E (or the website) would be very useful...

Thanks Gary. I am going to write to the current registered owner but I suspect that you may be correct..

The wing mounting was fairly straightforward. Originally the kut had a laser cut ply sub former that carried two nylon wing bolt mounts. However, because i have modified the interior, i couldn't use this so had to settle for a single m5 steel bolt through the te of the wing. This was reinforced with a small ply plate. The Tee nut sits in a 6mm ply plate bonded to the gf fus at the end of the cut out area. If that makes sense.. Two dowels locate at the le. These are glued into the ply brace. All pretty traditional stuff. A balsa wing fairing blends the gf fus into the lower wing root area. Looks better after it was sanded down. With that done, it was time for a dry assembly. The gap to the wing fairings leaves a bit to be desired. So, out with the solartex to cover the wing. Only 11 sq m left... Wing now covered and painted white, i still have the red trim to do. Now, if you are still there, can anyone suggest what has happened to the colour scheme under the wing root and fus looking underneath. I thought it was red, but it doesn't look very red to me.. I dont think its black either and its not shadow.. Very confusing..

Still slow progress. I can just about manage an hour or so standing in the workshop before my back complains too much. This weeks efforts have been fitting ailerons flaps and linkages which has taken far longer than it shoukd have. The hinging went fairly well for me with reasonable tight joints along the trailing edge although the dihedral break flap/aileron junction still doesn't look quite right. Horns fitted as per plan, the flap uses these micro alloy indoor horns which have been reused. The ailerons use small plastic horns which I had in stock. I didn't like the ones supplied. The aileron horn looks decidely weird at 90 degrees to the te but the linkage comes straight out. Dictated by the position of the hard point. However it seems to work ok. flap horn Aileron horn Servos and servo brackets all went in ok. And All linkages terminate with clip locks and clevises at the aileron servos. Soldered washers will secure the pushrods to horns after it has been covered. Next job is to remove the pushrods and horns, sort out the wing mounting then cover the ailerons and flaps and underside of the wing then permanently glue the hinges in.. More to come..

Thanks Piers The rudder and tailplane servos are mounted under the rear seats. Rudder will be closed loop. The throttle servo sits between the front seats but is side mounted so only the arm may show. I still need to find a home for the reciever and battery and switch. The reciever may go in the wing. Not really thought it through yet.. 😂

A little bit more progress this week. Wing centre section is built in two halves and then joined using ply joiners at the le and spar. I also added a balsa brace at the TE. The TE floats in mid airso is blocked up and double checked with a straight edge. The steel threaded rod holds the ribs down against the packing while the glue dries. The wing tips go on before the centre panels are joined. Note the oversized TE has been added. Not sure i like assembling in this way. Much prefer rib tabs to set the height of the ribs. Wing halves joined. I didn't sheet this half so that i could see what was happening and try and get a decent join when the sheet does go on. In the photo above, you can see the mounting plate for the aileron horn. Glued to the rib and also the bottom sheet. I have added a 1.5mm balsa doubler to add a bit of stiffness. Which led onto sheeting top and bottom and mistake number 1. The lower sheeting should have gone out 1 extra bay. A workaround follows. Cap strips and shear webs and assembly mistake number 2. Which i chose to ignore. Can you spot it? I have widened the servo bay to comfortably accommodate two aileron servos. Plenty of space under that fuselage. The workaround for mistake number 1 was serendipitous. I didn't like the mounting arrangement for the flap horn (glued directly onto the sheeting) so i added a strip of 5mm balsa between the ribs and glued a small section of underside sheet to that. The horn is attached to a 1.5mm ply plate and glued to the upper edge of the balsa brace. The sheeting is only needed for the slot for the flap pushrod. A small strip of balsa covers the beech undercarriage block. Underneath it looks like this. While the glue is drying, i designed and started 3d printing a set of horizontal servo mounts. More to come..

A bit of progress. Not been too well over the past few weeks but i started painting the fus. I used klass kote from fighteraces sprayed on using an automotive touch up air gun. It really is very nice to use. Lettering was traced from a side view, it is very slightly slanted. Needs a little more work as i managed to mark the white slightly when i removed the lettering mask. Made a start on the wing. The wing tips and ailerons are supposed to be built on a jig. This is to build in some washout due to the extreme taper on the tips. Unfortunately, the jig pieces were missing so i had to guessimate and make my own. One of the problem is that the chunky wing trailing edge and aileron leading edge need a fair amount of twist which loads up the structure. The left tip went ok. As soon as the sheeting was on, i removed the tip and planed off the bevels to allow aileron movement which removed some of the stress Lots of clamps to hold that twist... The right tip and aileron was a little more problematic and the aileron bowed. A bit of dampness and splitting the join at the TE and then clamping flat for 48 hours seemed to sort that. And I have just made a start on the centre section panels. The instructions are rather lacking and the plan isn't much help especially regarding servo mounting for the ailerons and flaps but I am sure I'll get it sorted. More to come.

I'll have a rethink on Depron wing ribs. I actually used them on a Classic Aerobatic model a few years but used balsa cap strips. I found that 6mm Depron was about the same weight as 1/16 balsa. Quite impressed. The wing has shown no sign of failure and has been fairly regularly flown.

Thanks all and thanks for the lead on the laser. As I want to use this model for Scale Comps I think the 120FS would probably be OK. I am allowed to dive to make a loop. I have however put in a bid for the laser as it will deffo come in handy in the future if I don't use it on this.... Fair point on making ribs Martin. I am trying to be lazy TBH 🙂 I have tried Depron ribs in the past. OK but I would not want to risk using them at 1/4 scale. This model needs to last and I want to avoid rework.. That's a great video, thank you.. Martyn

Thanks Martin I have been warned about the upper wing bracing. I am also planning to ditch the awful kit supplied ribs as well. I'll get SLEC to cut me another set.. from my CAD drawings just in case there have been any changes. I like the idea of the piggy back fuel tanks, something I haven't tried. One of the benefits of the pumped OS is that the tank could go anywhere but I do need to look at the plan.

I have a nib pumped os 120fs surpass III available but i didnt think it would be big enough. I was thinking along the laser 150 but if i can get away with the os, that would be great.

Hi all I am think of starting my old Precedent Stampe kit this winter and pondering what power plant to acquire. I am thinking of going for a laser. I am sure this has been asked before but what is a good fit? Scale fidelity is important so preferably nothing hanging out in the breeze apart from perhaps an exhaust stub.. Any other alternatives - petrol? Thanks Martyn