Martin Harris - Moderator
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Posts posted by Martin Harris - Moderator
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41 minutes ago, Paul De Tourtoulon said:
Good morning Martin, have you a lien for your videos for Youtube, my snails internet connection won't charge them, while the first one
was charging, I cleaned the wood fire built it up and lit it, made myself a coffee and drank it, and all I charged was the first 10 seconds,
it's like a lot of the 'heavy' photos ( I won't name and shame them 🤢) I just can't load them.😡
Watch this space for the Youtube version of the first video - being processed...
UPDATE That was quicker than forecast...https://youtu.be/kBgaPKntmP8
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A slightly more successful landing from the -4 oz. flight a couple of days earlier...still exhibiting nose happy behaviour though.
Link for the bandwidthly challenged: https://youtu.be/rSv7ez5mknA
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Ideal for complying with directions to pass both sides of a central bollard.
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At the risk of revealing my ineptitude, here's a video of the recent test flight which ended in a minor disaster (all repaired now) which took me rather by surprise. Looking at the video suggests the engine may have been a touch rich on the low end which may have caused the cut at the critical moment. Hopefully, the more successful parts may give Ian some confidence for his version's forthcoming maiden!
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I’ve used this method to good effect on several occasions. While laminar flow may be lost, the aerofoil is modified enough to reduce the effective angle of incidence.
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Regarding the types of publication stocked by used book shops, they’re not set in stone, you know.
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If they’re scale style ailerons, setting some up on both ailerons can tame a nasty tipstaller by introducing some pseudo washout.
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Mine uses clamps that I made for the lower (more middle really) mount and a threaded hole in the top.
Much used and abused…
Showing evidence of previous long forgotten fixing methods. I think I duplicated whatever was original with reasonably substantial aluminium doors many years ago. The old girl is well past the first flush of youth but is still great to fly!
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Great description - done right, there’s an almost surreal connection between the throttle and its effect on the model’s position on the glide path. Difficult to visualise in words but get a steady approach set up - particularly with draggy flaps - with power balancing drag and the connection is unmistakable.
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The odd thing here is the description of “banging from end to end” - when I’ve encountered similar scenarios it’s been more of an oscillation around the neutral point - and on a control surface subject to gravity e.g. an elevator.
If the servo is a direct, rather than indirect type then perhaps it’s simply the weight of the rod putting a load on a dodgy potentiometer and causing a false position reading?
I’d second the advice to try a different servo if that hasn’t been tried.
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...or exceeding the power capability of a BEC?
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What happens if you push gently on the servo arm with the pushrod disconnected? Is it an analogue or digital servo?
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Looks like my Sterling Stearman and Cessna 180 are both "genuine" classics then - although the only original part in the Cessna is the steel cowl saved from my mid-70s build from the kit.
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Doing some "fag packet" calculations using figures from the internet with some assumptions on scale fidelity gives wing loading figures in the region of 34 oz/sq foot for Paul's VQ Hurricane, 37.5 oz/sq foot for Ian's and 32 oz/sq foot for mine (before removing the half pound of lead - now a bit less than 30 oz/sq foot). In Ian's favour is that he won't need to carry so much fuel but if there's any weight saving possible (maybe delete a flight battery or put two smaller ones in?) it might pay to make them - at least for initial test flights.
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3 hours ago, leccyflyer said:
The recent build threads of Vintage RC models from Aeromodeller and RCM&E on RC Groups had Vintage defined as at least 50 years, so models built from plans pre 1973.
The Vintage Radio Control Society has their own definitions
PIONEER - prior to January 1, 1955
CLASSIC - prior to January 1, 1965
NOSTALGIA - thirty-five years before January 1 of the current year.It's going to be a moveable feast and also vary by location - models deemed to be Classics over here certainly would include some that don't fit those criteria - by common parlance over here the Wot 4 and Mick Reeves Gangster would deemed Classics, but I think those would be a bit later than 1965.
Are these definitions applicable to models built from plans dating from before the cut-offs or models actually built before them?
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I was thinking we hadn’t heard from you lately just a day or two ago. Sounds like you’re making encouraging progress - hope you’re out and about before too long.
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This appears to duplicate a current thread so I’ve locked it for now.
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Can you post pictures of the relevant parts of the plan?
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Hi Paul - I don’t know what sort of building experience you have but the normal convention is unless stated otherwise or denoted by grain pattern/direction, wood is balsa.
Your cowl mount plan extract, for example, shows both the pattern for ply and specifies liteply (rather than the heavier/stronger birch ply generally used for more structural parts.
Balsa is often shown with short straight parallel lines, denoting grain direction.
Hope I’m not teaching you to suck eggs…
P.S. I would have removed the sticker from the balsa as it won’t help the glue adhesion and those generous glue fillet’s won’t add much other than weight. Always worth saving the odd gram wherever possible…
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Hope you get it resolved soon. I think you’ll be more likely to get a result by pursuing the owner than posting here - as far as I’m aware, he doesn’t use this forum.
Jon, who gave us so much information and assistance on the forum no longer works for the company nor has any connection with them.
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It’s not a case that you can’t buy these products if you have a legitimate reason for having them. You have to prove you’re of good character as well - not unlike obtaining a shotgun certificate.
…and send the government some money - not a ridiculous amount though.
I wonder if you need a licence to grow rhubarb now! The leaves are rich in oxalic acid…
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Wow - that’s certainly modelling at its purest. How did you rivet the wing skins - they don’t look like pop rivets but I can’t imagine how you’d access the rivet tails…
Wing ribs hand made over a former?
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7 minutes ago, carlos rangel said:
No gluing at all in the whole airplane, every skin will be riveted to the structure
That sounds fascinating - any detailed construction photos?
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Do you bond the aluminium or rivet some or all of the structure? Something like Sikaflex or more traditional modelling glues?
Always amazes me the size of the Pioneer. Looks like a traditional light aeroplane until you see a picture of it with crew in situ!
Galaxy/Pegasus Hurricane
in All Things Model Flying
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Thanks for the kind words Paul. I’m planning on a further reduction of rates (I took the position of preferring a slight excess rather than insufficient) and the tight turns aren’t a normal feature of my Hurricane flying!
Although I cut out a lot of the taxying in the video, it was totally uneventful even with a stiff downwind component. I’m tending to come round to Jon’s ideas on warbird handling with the CofG significantly rearward of the plan position. I wimped out of further testing yesterday due to a nasty wind direction for our site…once bitten…