Here is a list of all the postings Robin Colbourne has made in our forums. Click on a thread name to jump to the thread.
|Thread: Use Venturi effect for cooling air?|
This is more or less what aircraft engines do; they don't just sit in a big empty space under the cowling. If you look at a Lycoming or Continental, the air is forced past the cooling fins by ducting and shrouds, then exits into a low pressure area to encourage the flow. Ideally the exiting air should be warm, which shows it is taking the heat with it.
|Thread: How much have you spent on modeling in 2020?|
Its a trick! Our wives and girlfriends are either holding Paul hostage and have hijacked his account, or else they've discovered what he has spent and are going to tell his significant other if he doesn't get us to spill the beans.
As the saying goes, I pray when i die my girlfriend doesn't sell my model stuff for what I told her I paid for it.
|Thread: Biplane build required|
How about Don Stothers Jabberwock III, 44" span? You would need to sort out your won electrical installation. Sarik Hobbies do plans, laser-cut parts, cowl, spats and even floats: Jabberwock III
There are four Jabberwocks in all, if you wanted to go larger: Jabberwock range
Edited By Robin Colbourne on 05/08/2020 23:17:38
Edited By Robin Colbourne on 05/08/2020 23:18:08
|Thread: Please help identify this glider|
I'm now wondering if it could be from the Bob & Roland Boucher/Astroflight stable. That diagonal sheeting behind the spar is one of the Boucher trademarks as are the diagonal tailplane ribs. Their Super Monterey is similar, but not identical. Here is one on RC Universe that has been rebuilt.
There'sa good chance it could be from abroad. Graupner, Multiplex, Robbe and Simprop have all sold models here, plus all those that British servicemen posted to Germany have bought back with them. Here's a good resource for German Kits Historic German Model Aircraft Directory
In addition to Germany, the USA, France, Belgium, Spain and Italy have/have had kit manufacturers.
Edited By Robin Colbourne on 02/08/2020 16:29:54
Edited By Robin Colbourne on 02/08/2020 16:38:17
|Thread: An intruder on our strip|
Practice forced landings are the most likely explanation, with drugs,contraband and illegal immegrant drop off being the possible but far less likely alternatives. Mis-identification of farm strips is also a possible.
|Thread: Ben Buckle kits.|
That's what Joe Elgin's 1939 original was designed to do!
Edited By Robin Colbourne on 18/07/2020 21:31:41
|Thread: switch harness|
The fundamental issue with switches for the airborne part of the radio is that they tend to get mounted to the airframe to make them accessible. Because of this, they are subject to more vibration than the rest of the equipment. The receiver is likely to be wrapped in foam, or stuck to a foam or velcro pad. Servos, certainly in engine powered models, are usually supported on the manufacturer's rubber grommets. That leaves the switch, containing sliding metal contacts and reliant on the sprnginess of the metal to keep them in contact, mountedthe side of the model, where it sees the full force of the vibration from the engine, regular dousings in fuel or exhaust residue and airborne dust thown up by the prop wash. Add frequent visits from oily fingers and is it any surprise that they fail?
|Thread: Aero art|
Richard, Could that actually be St Wulfram's Church in Grantham? In which case it would be this mid-air collision that is depicted. If you click on the picture you will see the registration lines up: Mid-air collision - Airspeed Oxford / Ju88
Edited By Robin Colbourne on 16/07/2020 23:05:35
|Thread: Seagull Boomerang or Arising Star - any difference at all?|
When you bank your model into a turn, some of the lift holding it up is now keeping it into the turn, so either;
When you finish the turn by levelling the wings, the model is now likely to have an excess of speed relative to when it started the turn as you now have the lift back that was resisting centripedal force; therefore the nose is going to go up. This is more apparent when turning into wind because the model covers less ground, so this climb appears steeper. When the turn is downwind and the model ends the turn going with the wind, the climb angle relative to the surrounding air is the same, but appears less steep to the pilot, as the model covers more ground.
Flat-bottomed wing trainers are great, partcularly for early lessons teaching older beginners in nil or light wind conditions, as the model can be trimmed to fly slowly enough that their brain processing speed can keep up, and prevents them losing confidence in the early stages.
Edited By Robin Colbourne on 15/07/2020 14:37:05
|Thread: What to do with an old camera tripod|
Great idea Tim!
|Thread: A model aircraft for Magnum GP 15|
£80 + £8.99 postage & packing
|Thread: Plans for Bowman 110 ins Sailman|
Hi Roy, Great to read that you intend to make the plan available. I'm sure there will be a lot of modellers who will be very grateful to you for dong so.
The Bowman's Super 100 is a bit like an enlarged Bowman's Simpleton with a longer nose. The original Simpleton nose was too short anyway; mine had a fair amount of church roof in it. I googled 'Bowman's Super 100', and look what turned up . David Ashby and his Bowman's Super 100!
Roy, I appreciate your Simple Sailman plan is a bit faded, but it would be really grreat if it could be preserved for posterity and available to other Bowman's fans. Outerzone welcome submissions and a lot oftheir plans have been re-drawn. I've not submitted any myself, but this is what the site says about doing so: Outerzone - Submit a plan
If you have a plan you want to submit, that's great. Be aware we have no way to deal with paper copies, so plans must be scanned and emailed. Any format will do: pdf, jpg, tiff, png, whatever you've got is fine. If you are doing the scanning yourself and wondering what settings to use, then a good starting point would be greyscale and 400dpi (although we do have some tutorial pages here if you want to go into more detail). Then just email it here to firstname.lastname@example.org along with any details you have on the designer, year, etc. Also please try and keep emails under 25MB total filesize. Thanks.
If you have files that are too large to email, then we recommend the WeTransfer file service. It's simple, fast and free. Currently (Oct 2017) you can send us files up to 2GB that way."
|Thread: Forum weekend prize draw - winners!|
Eeni meeny miney mo,
I'd be pleased with any of them,
So thought I'd better have a go....
...and here's a Post:
Edited By Robin Colbourne on 10/07/2020 11:51:00
|Thread: Ebay sellers...|
Doc Marten, I would love to know what is going on. It did occur to me that it might be some form of money laundering, but it seems a lot of effort for a relatively small gain. If it was something in the hundreds or thousands I could believe it. The Flyboy isn't even a particularly good model even if the kit was complete.
|Thread: A model aircraft for Magnum GP 15|
The Fun Fly 15 looks good.
Length = 760mm
Wing span = 1000mm
Motor size = .10 -.15
Weight = 1100 grms
This is a bit different: Revell / Hegi 'Fan' 43.5" Wingspan
or this: Ben Buckle Outlaw
Edited By Robin Colbourne on 07/07/2020 13:58:47
|Thread: Diesel anybody?|
Richard, my apologies! My eyes were getting muddled between Jon's quote and your post. Your Miss 38 looks great from all angles.
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