RE: landing bounce
If the model is floating 130 yards beyond the threshold, then the approach speed must be seriously high. Only the very lightest of touch-downs would fail to result in a bounce.
Posted on: 9/16/2012 5:27 AM by Author "bogbeagle" in the forum "Aerodynamics"
http://www.rcuniverse.com/forum/fb.asp?m=11229845

RE: landing bounce
In my experience, these are the factors that contribute to a "bounce". They may operate individually, or in concert1. 1... too high a touch-down speed, coupled with too high a descent rate. 2 ... stiff undercarriage 3... undercarriage far forward of CG (on a tail-dragger) 4... geometry such that the 3-point attitude equates to a low A of A. 5 ... high touch-down speed (on a trike)
Posted on: 9/15/2012 4:56 AM by Author "bogbeagle" in the forum "Aerodynamics"
http://www.rcuniverse.com/forum/fb.asp?m=11229116

RE: Vintage flying video
Glad you enjoyed it. I've acquired a little diesel, some old wings and a tailplane ... I'm going to have a go at FF, myself.
Posted on: 9/12/2012 8:20 AM by Author "bogbeagle" in the forum "Golden Age, Vintage & Antique RC"
http://www.rcuniverse.com/forum/fb.asp?m=11226106

RE: Model Aviation and Dogs
With respect to the OP, I can tell you that my two dogs always accompany me when I go flying. I don't see a problem with this, provided that reasonable care is taken. When I arrive at the field, I first take the dogs for a good walk (it's a public field, with wooded areas and such-like). Once they've had the keen edges knocked off, the dogs are happy to sit in the car whilst I do some flying. Then, it's another walk and time for home. There are unfortunate people who have no greater mental faculties than do my dogs ... and I wouldn't dream of denying them access to the field. Some of the guys like to play ball with my dogs; or perhaps share a sandwich. You can make it work, if you are sensible.
Posted on: 9/11/2012 10:03 AM by Author "bogbeagle" in the forum "AMA Discussions"
http://www.rcuniverse.com/forum/fb.asp?m=11225131

RE: Model Aviation and Dogs
Well, that's a much happier story than was mine. I recall flying somewhere in Kent, about 25 years back. I was with a bloke who had a 1/3rd scale Camel ... which was pretty special in the mid-80s. Anyway, he used to carry this model about in a caravan. He also had a Blue Border Collie. The only way he could load the model into the caravan was via the large rear window. And this was the method of unloading, too. So, he dutifully passed the wing panels out of the window and I laid them on the ground. Next thing, the bloody Collie launched itself out of the window and landed with a great thump ... smack on these wing panels. As you can imagine, a great cry of anguish went up from inside caravan. The dog was lucky to escape with its life. Buuuut, there was no damage done to the wings. Somehow.
Posted on: 9/11/2012 9:48 AM by Author "bogbeagle" in the forum "AMA Discussions"
http://www.rcuniverse.com/forum/fb.asp?m=11225109

RE: Model Aviation and Dogs
I used to fly at a full-sized field in Yorkshire. Some chap wandered across, with a Spaniel. On landing, a light aircraft whacked the Spaniel with one of its main undercarriage legs. Undercarriage collapsed. Dog in pieces. Owner disappeared across the fields... never traced, afaik. Multiple tragedy, really.
Posted on: 9/11/2012 8:47 AM by Author "bogbeagle" in the forum "AMA Discussions"
http://www.rcuniverse.com/forum/fb.asp?m=11225035

Vintage flying video
Vintage free-flight in Yorkshire. A Topsy, a Bandit and a Fox. Some dodgy engine-handling and a bit of first-aid. [youtube]http://www.youtube.com/watch?v=6YWYj4TNqkc&feature=player_embedded[/youtube]
Posted on: 9/9/2012 12:36 PM by Author "bogbeagle" in the forum "Golden Age, Vintage & Antique RC"
http://www.rcuniverse.com/forum/fb.asp?m=11222896

RE: suggestion for a club
I thought "saving fallen women" was part of the job description ... although I don't know how you'd explain why you have one "hanging up in the garage". Meanwhile, to address the OP. The best choice has to be something of the lowest-common-denominator, I suppose. So, here's a list of attributes which I think would be desirable. Small enough for transport. Suit commonly-sized engines or electric motors. Tricycle undercarriage. Simple construction with an ARF version available, for those who don't want to build. Low wing-loading and generally good habits (for a Hooker!). Economical to build ... no special materials, mouldings or so forth. No cowlings; good engine access. Looking at that Hooker, I think I just described it. Be nice if there was a more cambered wing available, too. Over here, that might be a Wot 4 ... comes ARF, kit, foamie, glow, electric and with a variety of wing sections. Dunno what you have in America. Elsewhere on this forum, there's a video of a bloke's Sig Kadet Senior, doing touch-and-goes. Looks lovely. Light, simple and so forth. And you'd get to support an indigenous manufacturer. [youtube]http://www.youtube.com/watch?v=6Z3OvJkAtNA&feature=colike[/youtube]
Posted on: 9/7/2012 5:46 AM by Author "bogbeagle" in the forum "Sport Flying"
http://www.rcuniverse.com/forum/fb.asp?m=11220512

RE: Let's see your touch and go's
Delightful to watch. The wx looks very autumnal.
Posted on: 9/6/2012 11:15 AM by Author "bogbeagle" in the forum "Sport Flying"
http://www.rcuniverse.com/forum/fb.asp?m=11219671

RE: Work Bench Finish
Wing-skinning epoxy ... or polyester resin.
Posted on: 9/4/2012 10:23 AM by Author "bogbeagle" in the forum "Questions and Answers"
http://www.rcuniverse.com/forum/fb.asp?m=11217058

Dragonfly ... video
My friend's large "Dragonfly" on display. Tricky weather conditions. [youtube]http://www.youtube.com/watch?v=eKhMMLmmXHg&list=HL1346668436&feature=mh_lolz[/youtube]
Posted on: 9/3/2012 3:32 AM by Author "bogbeagle" in the forum "Golden Age, Vintage & Antique RC"
http://www.rcuniverse.com/forum/fb.asp?m=11215362

RE: Ivory Gull aerotow
Ah, well, Barracuda, the "general theory" does not stand the test of practical experience. Therefore, I reject it. There's more than one way...
Posted on: 9/2/2012 5:28 AM by Author "bogbeagle" in the forum "Golden Age, Vintage & Antique RC"
http://www.rcuniverse.com/forum/fb.asp?m=11214257

RE: Ivory Gull aerotow
Normally, the glider pilot launches his own model ... so only two people are required. We had a third person launch Dave's Gull, owing to his inexperience with the aerotow.
Posted on: 9/2/2012 1:38 AM by Author "bogbeagle" in the forum "Golden Age, Vintage & Antique RC"
http://www.rcuniverse.com/forum/fb.asp?m=11214188

RE: Ivory Gull aerotow
I leave the towing bridle attached to the aeroplane, whether I'm towing or not. There's just a couple of inches of trace wire protruding from the tail end of the model. I attach the long towline to this protruding trace wire, when I want to aerotow. If I had to ditch the towline, for some reason, then I would have to gain access to the fuselage, so as to re-attach the bridle. Our T180 tug ... a smaller version of the T240 in the video ... has the release mechanism fitted by the tailwheel. A wire connects the release mechanism to a servo inside the fuselage. There's lots of ways to skin the cat. But, I do think that there is more load on the delicate after-parts of the fuselage when the release mechanism is located right at the tail. Everything is usually more robust as you go towards the nose of the fuselage. In fact, the release mechanism on the T240 is mounted underneath the fuselage and close to the main gear, such that there is ample access without removing the wings. The bridle then passes through a stirrup beneath the tail surfaces. You still need to make provision such that the towing bridle is guided clear of the aeroplane if it becomes necessary to discard the tow-line. A light-weight plastic tube will do the job ... snake outer is favourite. If something can possibly "hang up", you can be sure that it will. Good fun, though. The collaborative nature of aero-towing has absolutely rejuvenated my interest in aeromodelling. You can see our smaller tug (T180) here towing two gliders together. [youtube]http://www.youtube.com/watch?v=k74EqrITs6E&list=UU4HLk42VM0CCjglQ2KPcYdA&index=10&feature=plcp[/youtube]
Posted on: 9/1/2012 11:22 AM by Author "bogbeagle" in the forum "Golden Age, Vintage & Antique RC"
http://www.rcuniverse.com/forum/fb.asp?m=11213588

RE: Ivory Gull aerotow
OK. I will get some pics of Dave's Ivory Gull at the next opportunity. It's very pretty and I can't believe that it was sold to him for just £75. I don't have the T240 on hand, but I have uploaded a couple of pics which show the "release mechanism" as fitted to my Bi-stormer. The mechanism on each aircraft is quite similar. The Bi-stormer has the towing bridle (trace wire) secured to a strong internal bulkhead via a steel pin. The steel pin passes through a hole in the aircraft's bulkhead. The pin can be withdrawn by servo' action. The bridle passes down a plastic tube to an exit point at the rear of the aeroplane. The plastic tube ensures that the towing bridle cannot snag on any internal structures. We've been using this aerotow method for about 18 months, now and we usually land with the tow-line attached to the tug. A little care is required, to ensure that it doesn't snag on trees. A bit of rag acts as a drogue and a visual marker, indicating the terminus of the tow-line. As you will see from the video, landings are best made with a little engine power. If you cut the throttle early, there is enough drag to rapidly slow the tug. Each of our gliders is fitted with an independent release mechanism ... but I've heard that some people use a simple hook, quite successfully. I saw one video in which the tug was a Multiplex electric foamie; and it was towing quite large gliders. We found that towing from the ground, or from a dolly, is much more risky than the hand-launch method. Of course, hand-launch might not work if the model was very large or a heavily-loaded type. The only requirement of the glider pilot is to keep the wings level and to prevent his model from climbing too high above the tug... so a little forward stick may be required. The tug pilot must fly smoothly, reasonably slowly and must maintain a positive climb... if he descends, he takes the risk that the glider will accelerate, leading to the tow "snatching". This can be very violent. So, good piloting is required by both parties, as is communication.
Posted on: 9/1/2012 6:40 AM by Author "bogbeagle" in the forum "Golden Age, Vintage & Antique RC"
http://www.rcuniverse.com/forum/fb.asp?m=11213435

Ivory Gull aerotow
I thought that you might like to see my friend's new twice-size Ivory Gull having it's first flights. The model was aerotowed after a few test-glides. We have developed a very safe and easy launching technique for our gliders ... almost foolproof, in fact. The aerotow, being demonstrated in the video, was only the 2nd flight of the model and the second occasion upon which the glider-pilot had ever flown an aerotow. The pilot had experienced his first aerotow that same day ... and his first tow coincided with the first flight of his new Ivory Gull! The tug is a T240, with a 40cc petrol engine. A towing mechanism is fitted beneath the fin. [youtube]http://www.youtube.com/watch?v=CUhQc6ErzxE&list=UU4HLk42VM0CCjglQ2KPcYdA&index=1&feature=plcp[/youtube]
Posted on: 9/1/2012 4:23 AM by Author "bogbeagle" in the forum "Golden Age, Vintage & Antique RC"
http://www.rcuniverse.com/forum/fb.asp?m=11213355

RE: Vintage and Telemaster Day at Shropshire Model Flying Club 12th August 2012
I especially like the Tiger Moth ... did it fly well? And, you just can't beat scalloped leading edge paintwork. I dunno why, it's just soooo attractive.
Posted on: 8/15/2012 12:43 AM by Author "bogbeagle" in the forum "Golden Age, Vintage & Antique RC"
http://www.rcuniverse.com/forum/fb.asp?m=11194030

RE: A bit of vintage flying at Cocklebarrow.
Well, as you know, John, there was a lot more video of yourself, but I'm a bit fanatical about editing. So, 80% of the footage was discarded in the interests of brevity. It'd be best to have someone else edit my video, 'cos they can be even more ruthless ... but, I don't know anyone who would care to do it. Anyway, your Mamselle was my favourite amongst the models that were at Cocklebarrow; not because of its looks, but because of the way it was flown.
Posted on: 8/14/2012 8:28 AM by Author "bogbeagle" in the forum "Golden Age, Vintage & Antique RC"
http://www.rcuniverse.com/forum/fb.asp?m=11193016

A bit of vintage flying at Cocklebarrow.
Here's some video oddments of last weekend's vintage meet at Cocklebarrow, in Gloucestershire. The weather played up, so the fun was all compressed into just a few hours. [youtube]http://www.youtube.com/watch?v=17vwsSuWCEE[/youtube]
Posted on: 8/14/2012 5:45 AM by Author "bogbeagle" in the forum "Golden Age, Vintage & Antique RC"
http://www.rcuniverse.com/forum/fb.asp?m=11192764

RE: Are we Geeks?
I prefer the noun "anorak". I am an anorak. You are an anorak. He [size=1](it's always a "he")[/size] is an anorak. I associate the term "geek" with people of a very technical mindset ... which is rarely the case with model flyers, in my experience. "Anoraks" occupy a broader church. There is a subtle difference between the geek and the anorak. Geekiness implies a level of competence which is generally absent in the garden-variety "anorak"... though there have been reports of inter-species breeding, leading to some notably inept off-spring. Though increasingly rare, "Anoraks" can still be found on the wind-swept platforms of railway stations; notebooks in hand. In fine weather, they may even be spotted clinging to the chain-link fencing of airports. Owing to habitat loss, their numbers are declining and it is unusual to find a healthy example in the wild. The proliferation of their natural predators ... police, security-cameras and busy-bodies ... means that the breed is now rarely seen outside of captivity.
Posted on: 8/9/2012 11:58 PM by Author "bogbeagle" in the forum "The Clubhouse"
http://www.rcuniverse.com/forum/fb.asp?m=11187831

RE: London Olympics are fantastic!!
The opening ceremony was a marvellous celebration of collectivism. Revisionist history from an affirmed Marxist... Boyle. Surprised to hear you Americans cheering on socialised medicine and standing armies. Actually, I'm not surprised; more "disappointed", really.
Posted on: 8/2/2012 2:16 AM by Author "bogbeagle" in the forum "The Clubhouse"
http://www.rcuniverse.com/forum/fb.asp?m=11178137

RE: Phillip Kent 1/4 scale Aeronca C-3
The C1 is the one that I built ... using the free plans that were published around 1990. You are correct in that the front end is built as a sub-assembly. It all works out pretty well, though there isn't much room in which to conceal an engine.
Posted on: 8/1/2012 3:58 AM by Author "bogbeagle" in the forum "RC Scale Aircraft"
http://www.rcuniverse.com/forum/fb.asp?m=11176939

RE: YS 70 tuning question
Yes, I do lose out on power. It's flying a 10lb model and is about right for that purpose. But, I now have a nice tractable engine, that is easy to use and is very reliable. Before I did these mods, the engine was a powerhouse, but temperamental ... I could live with it being thirsty, but I can't stand having to tinker when I should be flying. I did think of selling it, but what do you get for a second-hand glow engine, these days? Anyway, I'd rather have a high-quality plodder than a few quid in my pocket.
Posted on: 7/29/2012 5:48 AM by Author "bogbeagle" in the forum "Glow Engines"
http://www.rcuniverse.com/forum/fb.asp?m=11173113

RE: YS 70 tuning question
I have the old 120. Absolute and complete PITA. So, I took off the supercharger, fitted an external fuel pump and a conventional carb. Now, it is possibly the best engine that I own, in terms of ease of handling. Waaaay down on power, mind, in comparison to its former self. Sips fuel.
Posted on: 7/28/2012 11:46 PM by Author "bogbeagle" in the forum "Glow Engines"
http://www.rcuniverse.com/forum/fb.asp?m=11172965

RE: A Question about Hard Landings and Strong Landing Gear
Having watched the video, there's no nice way to say it ... incompetent. You can't expect to design flying structures that will tolerate that sort of abuse. It'd probably be kinder to say, "lack of competence."
Posted on: 7/23/2012 10:46 PM by Author "bogbeagle" in the forum "Questions and Answers"
http://www.rcuniverse.com/forum/fb.asp?m=11164530

RE: Phillip Kent 1/4 scale Aeronca C-3
I built the C-1 from his plans, about 20 years ago. One of the best flying machines I ever owned. Wore it out and moved it on.
Posted on: 7/21/2012 11:58 AM by Author "bogbeagle" in the forum "RC Scale Aircraft"
http://www.rcuniverse.com/forum/fb.asp?m=11163642

RE: JCP commercial should be pulled
You chaps should see what happens when you use this brand of under-arm spray. There should be a law against it. Or, something. Oh no, wait. One of the distinguishing features of humans is that they can separate fantasy from reality. [size=1] (Unless they are crazy ... in which case, it doesn't matter what you show them, 'cos they're crazy.)[/size] [youtube]http://www.youtube.com/watch?v=mutp93DDIyw[/youtube]
Posted on: 7/6/2012 11:57 PM by Author "bogbeagle" in the forum "The Clubhouse"
http://www.rcuniverse.com/forum/fb.asp?m=11146145

RE: JCP commercial should be pulled
I just watched the ad. [color=#990000][size=6]Totally Innocuous![/size][/color]
Posted on: 7/6/2012 10:46 AM by Author "bogbeagle" in the forum "The Clubhouse"
http://www.rcuniverse.com/forum/fb.asp?m=11145434

RE: JCP commercial should be pulled
It's a disease, isn't it? I'm sure it's been deliberately released into the population, by some nefarious Government research laboratory. I expect that there's some tonsured Central-Planner, in a secret bunker, reading these posts and gleefully rubbing his hands at the success of his evil schemes. Muhahahahaha. BTW, did you know that towels are the leading cause of dry skin?
Posted on: 7/6/2012 8:59 AM by Author "bogbeagle" in the forum "The Clubhouse"
http://www.rcuniverse.com/forum/fb.asp?m=11145312

RE: 100KM cross country flight.
My mate has an Enya .40 diesel engine, four-stroke ... does that thing sip fuel. Phenomenal reliability, too, it just refuses to quit, whilst ever it is getting fuel. Not necessary for this 100 km project, but could be worth investigating for a more ambitious journey. I noticed that Maynard Hill's model was consuming 2 ounces per hour ... my 1.80 Saito consumes that in one minute.; my YS 1.20 consumes that in 40 seconds. Yes, I know, apples and oranges. Still, 2 ounces per hour is phenomenally frugal.
Posted on: 7/5/2012 1:55 PM by Author "bogbeagle" in the forum "Questions and Answers"
http://www.rcuniverse.com/forum/fb.asp?m=11144340