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Model Forum / Radio Controlled / Air Models / August 2009Tiger shark flew today
What a pussy cat ...Jett engine dint even get it over 150 mph! ill go watcha skip rust! > What a pussy cat ...Jett engine dint even get it over 150 mph! > > ill go watcha skip rust! Throw all that junk away. Get yourself a dynamic slope soarer and find a slope suitable for the purpose and then get some r-e-a-l speed. There I thought we could find a use for that skip >:-) Reminds me, I haven't looked for a while. Last time I checked I think the speed was up around 230 mph anyone know what it currently stands at ? Reg send a picture so we'll all can see it > What a pussy cat ...Jett engine dint even get it over 150 mph! > > ill go watcha skip rust! Unless its been beaten since, the UK power speed record is held by a Windsock Mini Delta 2000 powered by a Jett 50 Motor. The record speed is 183 MPH but the model was recorded on the day but outside of the record qualifying criteria at 234MPH See http://www.tmfc.org.uk/records/speed.html I dont see any reason why a Tiger Shark using this same engine shouldnt be of similar speed. I did the test flight on it and as Xntrick says it did about 150MPH, I judge that from the speed of my Laser Arrow that has been trap tested at 120MPH, it was certainly appreciably faster than that. However, The Jett 50 motor wasnt absolutely on song, and it is still using its running in Graupner 10x7 prop, not the APC 9x9 that it will eventually run on. Also visibility was less than ideal which meant I was throttling off for the distant turns. I never got a full throttle run in of over three seconds, at the ends of full throttle runs it was still accelerating. It has some goodly speed to come yet, both through technical gains and through flight technique gains possible in good visibility, yet by ordinary at the club field standards it is already fast. The Jett 50 is an absolutely awesome motor, and so far the Tiger Shark seems able to handle it as there were no peculiarities to its flight. These speeds may not sound fantastic, but believe me they are fast enough, at 180MPH for example a model is travelling very nearly ninety yards every second and a small model like a Tiger Shark becomes very small and in the distance very quickly. > Unless its been beaten since, the UK power speed record is held by a > Windsock Mini Delta 2000 powered by a Jett 50 Motor. [quoted text clipped - 6 lines] > I dont see any reason why a Tiger Shark using this same engine shouldnt > be of similar speed. > send a picture so we'll all can see it > >>What a pussy cat ...Jett engine dint even get it over 150 mph! >> >>ill go watcha skip rust! Cant put pictures on here i get me fingers burnt! Get yourself a Magnum sh.t off a shovel :-) Weston 50v1 with tuned pipe (Dogs Bollocks) When the Weston display team fly Magnums and Tiger Sharks together at shows there is no discernable difference in their speeds, I watched carefully at Wings and Wheels recently when the team flew two of each together and I could see no difference. We do have a Magnum but are going with the Shark as we couldnt see any difference in the speeds despite specifically looking for it. They obviously use the Weston engine whereas this Shark is using the Jett 50 engine. The Jett 50 engine has to be seen to be believed, its power is phenomenal and there is still more to come as we are only early into the work up. I have flown the Jett before in its running in airframe, a Laser Arrow; at full throtle the Arrow was forced faster than it could cope and it began serous and unpredictable brickwalling, the worst example of which resulted in an instant 50 foot plunge and half roll to the right, not an enjoyable experience at 140ish MPH. Throttle on in the air on the Shark resulted in an immediate car like acceleration that drew gasps from those present, the thing literally leaps forwards, and I was requested to repeat it about half a dozen times before it had been seen enough. Saturdays testing was just to cautiously prove that we had a dependable combination, there was no intention of going for broke. Even so all present were more than impressed, this TigerShark will go appreciably faster yet. > Get yourself a Magnum sh.t off a shovel :-) > > Weston 50v1 with tuned pipe (Dogs Bollocks) Ive had the great fortune to be present several times when the West team have flown the sharks and magnums during testing and can confirm that the sharks will do about 160mph and that the magnums will do about 180 mph. they both use West 50 v1 and the same fuel the difference being down to the drag of the two styles of model > When the Weston display team fly Magnums and Tiger Sharks together at > shows there is no discernable difference in their speeds, I watched [quoted text clipped - 28 lines] >> >> Weston 50v1 with tuned pipe (Dogs Bollocks) > Get yourself a Magnum sh.t off a shovel :-) > > Weston 50v1 with tuned pipe (Dogs Bollocks) I have the magnum and its still to be built....the weston is on the shopping list.I saw em go at wings n wheels and the shark and magnums were side by side all the way and having spoke to westons he was a bit suprised id not bothered to build the magnum having had it so long. i would have thought the shark was faster as the wing section is flat and cut the air real good. The world speed record is a blistering 262 MPH and that was by a glider dynamic soaring, I even have the video on my PC! > The world speed record is a blistering 262 MPH and that was by a glider > dynamic soaring, I even have the video on my PC! They have upped it again then since I last checked the DS info. I have some short vid clips obtained online. They were around the 220 - 230 mph speed range. The DS lads are not going to rest 'til they get 300mph I reckon >:-) Its impressive the way the planes have steadily evolved. I have some good footage of a few that just literally exploded in mid-air. You can hear the screaming sound of the plane travelling over 200mph and then `bang' and debris fluttering down ! Thanks for the update. Reg Hi Everyone I have just seen this thread (even though it is a few years old) and thought I would add a few comments. I designed and supplied the Windsock Mini Delta2000 (Windsock Models is my company). There is a certain amount of confusion over the speeds that models can do and records that have been set. Firstly, it is true that the official British speed record for ic engines of 10cc or less (.61cu in) is 183.711 mph. This is held by a MiniDelta 2000 flown by Andy Ellison. It is also true that the model recorded a speed (using the same measuring equipment) of 234 mph. This is where the problem starts. To be an official record, it has to comply with BMFA rules in the UK (AMA in the USA). These rules allow for calibrated stopwatches up to speeds of 300kph (that is 187 mph). The rules also stipulate the run in distance and height as well as the length of the measured course. There is also a requirement that it is the average of a pass in each direction IN THE SAME FLIGHT that qualifies and that any pass over 300 kph cannot be used. The people timing the model have to be approved by the BMFA and then the paperwork is passed to a general council meeting for official ratification. Now when you look at the above you will see that it is very difficult for that record to be broken as one pass will always be faster than a pass in the opposite direction and you only have 3 mph to play with. Any record attempt at speeds of over 300kph must be taken with callibrated and authorised electronic timing devices - a friendly local police officer that turns up with his handheld speed radar gun just will not be accepted. There is no general speed record for model aircraft as each international class has its own record and is only ratified by that countries governing body. Record attempts are difficult to set up as a lot of people are involved but always well worth the effort. Having tried one (successfully or not) it will always make you smile when you hear somebody on your local field saying 'my trainer was really fast last week - it was doing about 120 mph on an ASP .40 and a Master Airscrew 10x 6 prop. My advice to all of you. Go try a record - it is great fun! Richard >> The world speed record is a blistering 262 MPH and that was by a glider >> dynamic soaring, I even have the video on my PC! [quoted text clipped - 13 lines] > > Reg |
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