Robert Welford

Posted by Nigel R on 13/07/2020 10:05:36: Nigel - I'm probably missing something here, but couldn't you rotate the throttle arm on the carb so the linkage is above the engine mount. This looks as if it would give you enough room even for a link/ball-ink if you made an appropriately sized hole in the firewall. I recently finished putting together an Acrowot XL with a 3w 28i petrol. The reason for using this engine is it's both powerful and very easy to start. Anyway on trying to start the engine in this airframe it would not start easily - lots of head scratching! In the end I found that the linkage to the choke servo was fouling the firewall and thus didn't close the choke fully.

Posted by Richard Clark 2 on 13/07/2020 00:29:41: But I'm not impressed by the new Cockpit. Richard: what are your concerns with the new Cockpit SX 7/9/12? I own a SX9 tx, but have yet to use in anger as I have few other Mpx transmitters in use.

Jon, I would be pleased to trial 180 petrol in either Toni Clark Super Cub or Acro Wot XL.

Jon, as you know I'm a user of your engines so I would be interested in "beta" testing new engines. I have a Toni Clark Sopwith Pup to build so a 60cc multi-cylinder that is capable of swinging a large diameter prop would be of interest. Shorter term I have a airframes that could be used for testing new design engines. Robert

Yes - I use Nord-lock washers on petrol engine manifolds - they remain secure.

I used to cycle to the Longmoor flying site in Sutton Park as a child in the late 60s to watch the flying. I remember Dennis Thumpston flying his Twin Fin design - powered by a diesel engine. In those days there were a few Super 60s being flown using RCS Guidance SC radio. I also remember seeing a Pete Russell Striker. Martin, what were you flying around 1969?

When I started aeromodelling in the late 60s as a boy the local model/toy shop was Gills in Sutton Coldfield, Warwickshire (West Midlands now). I bought my first engine from there, a Cox Babe Bee - I still have it.

I have an almost complete Flair Tiger Moth that has been painted in Flair Spectrum paint. I wish to re-paint parts of it. Spectrum is not fully fuel proof so would prefer to use an alternative paint that is. The Spectrum silver also appears to be a bit of nightmare to get a uniform finish. My question is: what paints will be ok and will not cause a reaction with the Spectrum paint underneath? All advice gratefully received. Robert

I have an ARTF Acro Wot with a Laser 80. However, I would recommend using an Irvine 53 or an OS 55 AX. Both are fantastic engines and are the same size as 46 engines. Available on ebay, or BMFA ads, for reasonable money. Edited By Robert Welford on 18/06/2020 16:54:49

Things I've I had fall off airborne models: wheels canopy tailplane half - all moving tailplane on glider Sliding bit on Webra 61 Dynamix carb. silencer Fortunately, in all cases the models were landed without damage.

Posted by john stones 1 on 10/06/2020 08:48:51: Watched a video of one, sounded great, he said 97 db at 10 feet, what you lads think ? Please provide link - thank you.

Thanks Alan. I'm planning to use mine in a Toni Clark 1:3.85 Super Cub. The power should be adequate and sound better than a petrol 2-stroke. Edited By Robert Welford on 07/06/2020 19:37:39

I was wondering whether anyone owns an OS GF40 4-stroke petrol engine as I have just acquired one. If so, what is your experience? What model have you used it in? Best propeller? Robert

Lovely build Jason - well done. I'm disappointed it's not going to be powered by a Laser 4-stroke

I have had the same problem. I found heating plastic shroud with heat gun allows 4mm plug/socket to be pushed home. Don't over do it with heat gun!

Not a very successful flying session then! A lesson for us all that we need to be a little more cautious when returning to flying after an extensive layoff. We have a similar problem (but a more serious one) at my gliding club (same for all UK gliding) where many pilots haven't flown since last September and when (if) we are allowed to fly again 2-seater flying will not be an option because of social distancing (2m rule), so no training and no check flights. Edited By Robert Welford on 13/05/2020 12:01:54 Edited By Robert Welford on 13/05/2020 12:13:18

Kevin - I assume your Hannibal is powered by a petrol engine?

Posted by Piers Bowlan on 30/04/2020 16:04:46: Yes, the Cowl is indeed available from Carbon Copy the problem is usually getting the plan. Any chance of me getting a copy Robert? I have an NGH 38 needing a home and the Flair Hannibal could be spot on for it. I will PM you. Piers, I've sent email to you with CAD plan attached. A clubmate built a Hannibal from the plan last year.

Chris, when I have used carbon for pushrods it is tube not rod. I insert a threaded fitting (either threaded rod or threaded adaptor) to each end bonded with JB Weld (better than other epoxies for this purpose). I think it was Macgregor's who used to sell carbon pushrod kits that included the end fittings and quick links. I know people use carbon tube over a metal pushrod. For larger models use M3 threaded rod, but sleeve it with >3mm ID carbon tube. This provides additional stiffness. Edited By Robert Welford on 30/04/2020 09:35:41

The contact at Inwoods is David Handley. I believe composite Hannibal cowls are available elsewhere including Carbon Copy. BTW I have a CAD plan for the Hannibal if anyone wishes to build one.

Chris, Is the wing's leading edge carbon tube? I assume the Pup was built from a Balsa USA Pup kit?

Have a look here and use the pull-down option menu Inwoods link

David, I'm in a similar position also with a Flair Stearman in my kit collection. I have an OS Sirius fr5-300 radial that I plan to use. It will sound superb. I am making good progress with a few projects so this may get to the front of the queue soon. I look forward to following your build blog. Have fun! Robert

I believe Inwood Models 3D print Flair Scout series wheels. Otherwise check ebay. Original Flair wheels come up from time-to-time. Currently: ebay link

ED plastic parts were certainly around in 1973/4. A friend bought an ED Super Fury marine version and it had plastic carb and backplate fitted.