RottenRow

Have you tried flashing the receivers with the UNI firmware? This eliminates the issue of different ACCST versions and LBT etc. Note that with the UNI firmware, you can bind the newly-flashed receiver (so you get a solid green LED) but you won't get any servo operation until you activate it using a code that you get from T9 or Aloft Hobbies. Also, sometimes a receiver won't bind if it is too close to the transmitter during the attempted binding process. Try them a few feet apart. Brian.

Sometimes on plans, tucked away somewhere, is a statement such as ‘all wood is balsa unless otherwise specified’; it’s worth looking all over again, in case you missed this. Robin’s models are always of very lightweight construction, and he often uses the split fuselage design that the DC3 has. I used to have a Percival Prentice built from his plans, it flew beautifully but had stress cracks around that fuselage joint, due to the odd heavier than ideal landing causing the joint to try to open up. I intended to add some extra support across the join, but unfortunately the model was involved in a mid-air collision before I got to do that. Looking at the photos in that build article, I would be tempted to add some kind of fixing at the top of the fuselage, across the joint, so that the joint doesn’t try to open up there. Brian.

You can get it in paper form for £10 a year, 3 issues I think. I’m not sure when the next one will be sent out though. Brian.

It’s BMFA News, not RCM&E, that carries Bill Kits’ box advert. Page 58 in the most recent printed version (February 2024). Brian.

Are you using the same USB lead that you used successfully on previous occasions? I’m just wondering if there is something non-standard about the on-board USB socket. Brian.

It is each flier’s responsibility to ensure that he or she flies safely. In the scenario presented, it would probably be the flier whose model was involved in the incident who would be liable, not the club itself, though it wouldn’t bode well for the continued existence of the club at that location. If your club is BMFA affiliated (and keeps that affiliation up to date annually) then the BMFA insurance indemnified the club’s committee members against any claim. Regarding the dual use of the airfield, whether both model flying and kart racing can operate simultaneously would depend on the proximity of each activity. The BMFA should be able to provide advice on all aspects of this. Brian.

Component shop will supply packs with a choice of connectors, see here: https://www.componentshop.co.uk/9-6v-eneloop-2000mah-aa-square-2x2x2-transmitter-battery-pack.html If one of those doesn’t suit, either transfer the existing connector to your new pack as Paul suggests, or replace the lead inside the transmitter with one made from a servo extension lead (remove the white wire) and get a battery pack with a standard Futaba connector. That is what I do on the old Futaba Field Force 7 txs, where the original batteries had tabs that pressed onto contacts in the tx case. Brian.

It’s worth flashing those X series receivers with the UNI firmware. Do them all, then send a list of the codes generated in the Activate LUA script to either T9 or Aloft Hobbies and they will send you back a list of activation code. From my experience, that has usually been within one working day. Brian.

Martin, the 120 was a squat engine (short stroke), the finned part of the cylinder was noticeably lower than its diameter. Here is a photo of my 120. Yours is definitely a 150, an early one as it has the Super Tigre carb. You will notice that the finned part of the cylinder is much higher on yours compared to the 120. Those shown on Paul’s paper sheet are the older ones with the glowplug at the front (the ones that Jon could no longer offer support for when the company was running). Yes it would have been better if they had been stamped with their size during manufacture, one wonders why they were left anonymous. Brian.

That’s the conclusion I came to as well. I think in Steve (OP’s) case, it’s his older version of Open TX that is limiting the number of different protocols that the transmitter can utilise, even though they are all ‘inside’ the MPM. Steve is (was) reluctant to update his version of Open TX, but that is probably the only way that he will get his transmitter to see all of the protocols available within his MPM. Or he could update the version of ACCST on his tx to V2, then the R6 Mini should bind directly with it (in ACCST mode). I was unsure whether that removed the option of D8 (for his other receivers), but Mike has said that D8 stays. Brian.

Great answer Mike, that explains a lot about what Steve is finding. Just one more please… do the Archer Plus receivers require specific firmware for either FCC or EU(LBT) when operating in ACCST mode, or don’t they care which mode the transmitter is using, as long as it’s V2? Brian.

Yes, it looks like you've come to a dead end for the moment. Perhaps somebody with a better knowledge of the MPM will come up with something. The correct protocol might be in your module but your tx won't let you select it, I don't know how you can tell that is the case though. Otherwise, it looks like you'll need to update the ACCST version in your tx to V2 LBT. I'm unsure if you dont lose the D8 option then though, though you could use your MPM for that as you mentioned previously. Brian.

Steve, my tx has Open TX version 2.3.11 as opposed to your version 2.2.3. I would guess that somewhere between these two versions, extra support was included for the MPM to cover the extra protocols that the module now has. Your version of Open TX doesn’t have the full ‘library’ of protocols. There is a way of manually loading a protocol if it isn’t listed on your tx. You use the custom entry (under Multi) and enter the protocol number (64 for FrSkyX2), then the sub-protocol (2 for EU LBT). This is described on the github page under ‘Serial Mode’, just above the ‘Protocol Table of Contents’ A bit complicated to try to describe… This is what it says… If still not listed, use the Custom entry along with the protocol and sub_protocol values indicated by the italic numbers under each protocol. You'll find a summary of the protocols and numbers to use in table below. Brian.

That’s the information given on the BUSA website. Their models, like DB’s, are sport scale so some liberties may have been taken. One possibility is to allow the use of standard 36” wood for the spars, leading and trailing edges etc. Just a guess… I just looked up the DB model on their website, and that is 77” wingspan too! Mick Reeves’ accurate quarter scale Pup has a wingspan of 79 1/2”. Brian.

Steve, my MPM has a lot more makes and protocols than yours is showing. Yet mine has an earlier version number (V1.3.2.86) than yours. Is yours the JP 4 in 1 module (label on mine in picture)? I know there are other versions of the module, perhaps there are differences. The list of available protocols is on this site (you need to scroll down for the list): https://github.com/pascallanger/DIY-Multiprotocol-TX-Module/blob/master/Protocols_Details.md I’m not sure how that helps you much I’m afraid. Brian.

Balsa USA make a quarter scale Pup kit, that has a fuselage length of 53”, a 77” wingspan and a wing chord of 14 3/4”. Could it be one of those? Can you see inside it whether it looks to have been built from a kit (printed numbers on parts perhaps?). Brian.

On the MPM, try FrSkyX2 LBT(EU). That will set the RF output to V2 LBT, which is most likely what your new receivers are. See photo which is on my tx (an X12S), it might appear a little different on the normal Taranis tx. If that doesn’t work, try FrSkyX2 D16, that sets it to V2 FCC, but it’s more likely to be the EU one that you want. Just to be sure, this is for binding with your new Archer receivers in ACCST mode. Not your old D8 receivers. Brian.

You don’t need to do that. You could leave everything as it is, then operate your new receivers using the MPM set to D16 V2EU (probably). I just found a D8 receiver, it binds to either my internal RF module or my external MPM, but it can’t bind to both at the same time, as would be suspected. Brian.

MPM is Multi Protocol Module. I suspect that you are trying to bind that D8 receiver with both the internal and external RF modules at the same time. Make sure you have set the internal module to ‘off’ before trying to bind it to the external MPM. I’m assuming that you are only trying to bind the D8 rx as a test? It’s the D16 mode that you need for your new receivers. D8 won’t work with those, as both I and Philip have already said. Brian.

Steve, further to my previous postings, I have just done a bit of experimenting. I have some X8R receivers that I have flashed with Mike Blandford’s excellent UNI firmware. One of the additional benefits of doing this is that the firmware comes with a LUA script file called UNI Stats. Running this when the receiver is bound to a transmitter tells you, amongst other things, the exact protocol that the tx is using (ie V1 or V2, EU(LBT) or FCC). Brilliant! Using this I have ascertained that (1) the internal RF module in my tx is V1EU (I did already know that) and (2) that the multi protocol module I have fitted has the facility to be set to all four combinations of D16 protocol, ie V1FCC, V1EU(LBT), V2FCC or V2EU(LBT). I have just bound the same receiver to each of the four combinations in turn and it works fine on any. Therefore, your new receivers will work with the MPM. You set the required protocol on your tx screen. D16 is V1, D16-2 is V2, then select either D16 or EU in the secondary menu. If your MPM is old and doesn’t have the D16-2 option then you’ll need to update it’s firmware version. Brian.

Hmmm… not sure why that should be, I thought there was only one version of D8. I must admit, I’ve not used D8 at all, only V8 (the original FrSky protocol) and then D16. Anyway, D8 won’t help you with your new receivers, as they will be D16. Brian.

I don’t think this is the case with the Archer receivers (see my post above). There is no ACCST firmware available in the downloads section of the FrSky website for these receivers, not that I can find anyway. The only firmware seems to be ACCESS firmware, which also gives ACCST support but presumably only V2. As Peter says, probably best give T9 a call or an e-mail. Brian.

Under the heading for FrSky Archer receivers on T9’s website, there is a note stating that they only work with V2 ACCST, see below: This suggests that you can’t flash these receivers with the older ACCST V1 firmware. As you don’t want to update the version of ACCST on your tx to V2 (it has nothing to do with the version of Open TX by the way) this means these receivers won’t work with it. One thing you could do is to install an FrSky XJT module in the external port in the back of your Taranis and use this to operate these receivers. A new XJT module would be V2 LBT if bought from T9 (though they are out of stock at the moment). This would not affect any of your other models which would continue to use the internal transmitter module. Brian.

The bendy needle valve and ratchet spring were used on various Enyas over the years. The “venturi” looks like a piece of brass tube, something home made probably to replace the missing original. Brian.

That is an ED Comp. Special, 2cc, late ‘40s. The needle and its fitting aren’t original. They look like they are from an Enya. Also the fuel tank is missing. Here is a picture of one from Mike Clanford’s book. Brian.