RE: On board gas..
A gas container is always full. Even when there is no more pression the container is full. The gas is always in balance: one part liquid other part gas When you open the container the pressure drops, the liquiq pass to gas. The formula is P+V=rT. So, respond to your question: Use cristal tube in your gas conection. Be sure you are filling your inboard container with liquid gas. When the liquid gas stops flowing from the main container to the inboard container, you will have all the gas you need. A small amount of liquid gas gives you gas enough for several starts. BE SURE YOU ARE NOT FEEDING YOUR ENGINE WITH LIQUID GAS
Posted on: 3/20/2009 3:05 PM by Author "JMCJET" in the forum "RC Jets"
http://www.rcuniverse.com/forum/fb.asp?m=8597871

RE: Heres a really easy question I don't know...
So, Peter: If you study it briefly I can only suggest you to study it deeply. Remember, that what is written here, is read for many people. If you disagree or do not understand, you can ask again or expose your facts. We can always learn something... The answer for the holes is well explained in this thread. And in other threads in this forum. You would be amazed if you know what Bernoulli did for us. From the intake of our jet engines to the exhaust, passing by the wings and disturbing our landings, everything is related with Bernoulli. Happy new year. JMC
Posted on: 1/3/2009 4:28 PM by Author "JMCJET" in the forum "RC Jets"
http://www.rcuniverse.com/forum/fb.asp?m=8313930

RE: Heres a really easy question I don't know...
again... there is negative pressure inside the exhaust pipe. the higher the speed of exhaust gases, the higher the negative pressure... so, we need air inside the pipe so that the pressure inside the pipe equalize the pressure outside ( atmospheric pressure) or we will get a collapsed pipe. Cooling is another question, but uses the same law: Bernoulli`s law. Making it easy, it says that the addition of pressure and speed remains unchanged: speed+pressure=k. If the speed goes up pressure goes down, because the addition of the two items remains unchanged. The air finds is way to reach the inside of the exhaust pipe
Posted on: 1/3/2009 2:44 PM by Author "JMCJET" in the forum "RC Jets"
http://www.rcuniverse.com/forum/fb.asp?m=8313594

RE: Exhaust Pressure
If you are good with mathematics and physics use the Bernoulli's law. You can find all the information you need in wikipedia. This is not an easy task and, by the way you ask, it seems to me that you will be surprised with the results. Inside the exaust tube there is, allways, negative preesure. If you suceed the task keep us informed. There is another way: Just drill a hole in the exaust, in the point you want to know the pressure, and plug a device as used in turbocharged cars, start the engine and read the information. You will read pressures bellow zero. Good luck
Posted on: 6/23/2008 2:41 PM by Author "JMCJET" in the forum "RC Jets"
http://www.rcuniverse.com/forum/fb.asp?m=7651767

RE: Effect of Missile Rails?
The real effect of missile rails is to prevent or minimising the WINGTIP VORTEX. Look for "WINGTIP VORTEX" in wikipedia.
Posted on: 6/17/2008 2:01 PM by Author "JMCJET" in the forum "RC Jets"
http://www.rcuniverse.com/forum/fb.asp?m=7629442

RE: JetLegend F-15 Problem !!
You must be sure that the air can flow betwin the two pipes. The holes in the outer pipe are only needed if, for some reason, you have not enough air flowing betwin pipes. When the engine is running, the high speed of the exaust gases build depression in the exaust pipe. So, the air must fill the "space" free. If this doesn´t happen the pipe collapse. This is true for both pipes, but is more critical in the inner one. The gap betwin the two pipes in the rear end is a very smart idea because it sucks the air from the other side (turbine side). This air flow keeps the rear of the plane cold. Your problem is that the air can not go inside the gap of the two pipes and than you have depression and a collapsed pipe. So: 8 mm gap in the rear end is OK. You must check why the air can not go inside the gap betwin the two pipes. Fix the problem and try again. If the rear end of your plane is still hot then you can drill some holes in the outer pipe to allow more air inside the gap of the two pipes. Saudos is not my name, but our way to wish the best. Saudos JMC
Posted on: 6/1/2008 12:05 AM by Author "JMCJET" in the forum "RC Jets"
http://www.rcuniverse.com/forum/fb.asp?m=7565216

RE: JetLegend F-15 Problem !!
Your problem is not the engine position, but no air flow betwin the inner and outer tubes. At the rear end the outer tube must be, at least, 5 mm longer than the inner tube and they must be concentric all the lenght with 5mm gap betwin them. As far as I can see by the picture, the air can´t go betwin pipes. You can drill one or more holes in the outer pipe to allow more air circulation if the rear keeps hot. Saudos
Posted on: 5/31/2008 6:49 PM by Author "JMCJET" in the forum "RC Jets"
http://www.rcuniverse.com/forum/fb.asp?m=7564251

RE: My CG Machine
http://www.rcuniverse.com/forum/m_5555429/anchors_5560662/mpage_1/key_/anchor/tm.htm#5560662
Posted on: 4/10/2008 6:19 PM by Author "JMCJET" in the forum "RC Jets"
http://www.rcuniverse.com/forum/fb.asp?m=7362552

RE: I COIMBRA JETS
This is the thread where some posts were deleted. Some of them were writen in Portuguese and others in Portuguese and English. The "only english readers" were always able to follow the thread. However one thing must be said: if in this forum is only allowed the English then a lot of posts MUST be deleted. If it is not the case the posts must be restored. http://www.youtube.com/watch?v=Zdf2eLeCLHI
Posted on: 3/28/2008 11:04 PM by Author "JMCJET" in the forum "RC Jets"
http://www.rcuniverse.com/forum/fb.asp?m=7299167

Good or bad news?
What do you know about the graupner 868 Mhz IFS ? Graupner says it is far better than the 2.4 Ghz: "...will provide additional advantages over 2.4 Ghz... propagation conditions are better for use on and under water... penetrates carbon fibre fuselages... little aerial, 9 cm long, do not need to be positioned at right-angles...." source: www.graupner-ifs-system.de And about the 35Mhz and 2.4Ghz simultaneously from acteurope? 7 to 10 km range? Are we spoiled by manufacturers or shall we suspect of so many good things? Will the 2.4 Ghz band reach the adult age? Manufacturers are fighting for the best share of the market or for safety? What do you think about this? JMC
Posted on: 3/22/2008 10:41 PM by Author "JMCJET" in the forum "RC Jets"
http://www.rcuniverse.com/forum/fb.asp?m=7267172

I COIMBRA JETS
I COIMBRAJTES in 25,26 and 27 April 2008 in Coimbra, Portugal. Web: www.asasdemira.eu email: coimbrajets@gmail.com 2 km tarmac runway, food and drink, special program for ladies, saturday night party, camping on site. For more information, plese contact us. Best regards JMC
Posted on: 1/21/2008 8:17 PM by Author "JMCJET" in the forum "RC Jets"
http://www.rcuniverse.com/forum/fb.asp?m=6946944

RE: POWERBOX 2800LIPO ECU!!!!
Yes... But lipos are not, now, overtaken by li mn and nano phosphate technology(A123) ? Are lipos a thing of the past?
Posted on: 12/20/2007 9:57 PM by Author "JMCJET" in the forum "RC Jets"
http://www.rcuniverse.com/forum/fb.asp?m=6784817

RE: new Blog
mmmhhhh !!!!!!!!!!!!
Posted on: 12/7/2007 6:53 PM by Author "JMCJET" in the forum "RC Jets"
http://www.rcuniverse.com/forum/fb.asp?m=6727457

RE: Is this legal?
http://www.youtube.com/watch?v=VtXCs0Wqs9Q&mode=related&search= http://www.youtube.com/watch?v=d33lWRiFsn0 http://www.youtube.com/watch?v=sdWST9-X-sE http://www.youtube.com/watch?v=teM4T3TylFc So... With so much to do at home, why are you so cncerned about what others do in their own country? De facto, um Brasileiro dizer piadinhas acerca da segurança de companhis aereas, é mesmo de muito mau gosto.... And Mr. Yellowcraft: You should think twice before writing words like amoral, unconscionable, depraved... I must remind you that a lot of things that you Americans allow to happen in your country, are, at least, amoral, unsconscionable, depraved... With my respect for all the victimes and their families, I mean incidents with guns in schools and and legal murders. And, yes, I have the right to say this. And Mr. Gladwin: You must be very happy. You are old enough to fly more than 40 years, but seems that you must learn a lot yet how to explain your point of view without flame, degrade, insult or embarrass. A flight was done. You desagree. OK. No big deal. You think that the world must know why you desagree. OK. Just do it. BUT YOU MUST RESPECT ALL THE OTHERS THAT THINK DIFERENT FROM YOU. Pilots of the flight " INCLUSO" If you think you must begin a CRUSADA against this type of flights, do it. IN THE RIGHT PLACES, i e, The autorities that rules this kind of things. And than, may be, you could say that you are doing something about safe. TO MR. GLADWIN AND ALL THE OTHERS CARPE DIEM
Posted on: 10/15/2007 8:38 PM by Author "JMCJET" in the forum "Airplanes - Full Scale"
http://www.rcuniverse.com/forum/fb.asp?m=6495163

RE: Is this legal?
......hhhmmmm....... It seems that a flight ,somewhere in Portugal ,bothers so much people... And it seems that Mr. Gladwin, after all, is not so polite as he should be... The flight was covered exaustly by Portuguese media and I could tell you a lot of things that you, I am sure, would like to know... But you did not ask politely.... So, at the level you speak, I am out...
Posted on: 10/14/2007 7:42 PM by Author "JMCJET" in the forum "Airplanes - Full Scale"
http://www.rcuniverse.com/forum/fb.asp?m=6490301

RE: 9 Cap mix question, help
[:@] For up elevator just mix elevator with itself, using the offset. Mater offset ------ slave elevator. % desired . switch c center pos.
Posted on: 9/11/2007 10:22 PM by Author "JMCJET" in the forum "RC Jets"
http://www.rcuniverse.com/forum/fb.asp?m=6356822

RE: 9 Cap mix question, help
...... I want two mixs........ Yes. That is the answer! Use pmix6 for take off flaps, like that: mix throtle with aileron. you have five positions,so: thr 1st pos. ------- ail % desired thr 2nd pos ------- ail same% as 1 st pos thr 3rd pos -------- ail same% as 1st pos thr 4th pos -------- ail same % as 1st pos thr 5th pos -------- ail same % as 1 st pos Use switch c to activate the mix (center pos.). For landing flaps use pmix7, same way but with % you want. Switch c to activate the mix, but now down pos.
Posted on: 9/11/2007 10:09 PM by Author "JMCJET" in the forum "RC Jets"
http://www.rcuniverse.com/forum/fb.asp?m=6356772

RE: P160 Help
The problem is that the gsu is processing information from the rpm sensor or/and temp. probe that are not correct. So, to protect the engine, the gsu cut the rpm. But the nightmare is that often is the gsu that "invents" the malfunction. It hapened to me. Get professional help, but ask what is the problem. Reset the gsu would be, probably, enough. Regards
Posted on: 8/23/2007 12:51 PM by Author "JMCJET" in the forum "JetCat Turbine Direct Support"
http://www.rcuniverse.com/forum/fb.asp?m=6276874

RE: HotSpot?
Try jetpower.usa. In the 2007 catalog there is a Hot Spot.
Posted on: 4/27/2007 6:42 PM by Author "JMCJET" in the forum "RC Jets"
http://www.rcuniverse.com/forum/fb.asp?m=5779931

RE: Fei Bao 1/8 Scale F-18F Super Hornet
[8D][8D][8D] Olá a TODOS! Parabens ao Paulo pelo F-18. Se não ponho mensagens em Portugues é, como diz o Henrique lá de Curitiba, porque não sabia que há tanta gente que " habla mi idioma". Amanhã, Sabado, será o voo inaugural para 2 maquinas novas. Se correr bem, mas só se correr bem, ponho fotos. Cumprimentos
Posted on: 3/22/2007 8:31 PM by Author "JMCJET" in the forum "RC Jets"
http://www.rcuniverse.com/forum/fb.asp?m=5602481

RE: weight and balance calculation
So Captainbob, I think your C.G. is not exactly on site... the sistem is great and works fine. Regards [8D][8D]
Posted on: 3/14/2007 3:30 PM by Author "JMCJET" in the forum "RC Jets"
http://www.rcuniverse.com/forum/fb.asp?m=5560662

RE: Jet Speed Event 2007
Olá Henrique. Este assunto está a ficar desinteressante! Podes dar as dimensões do equipamento que é necessário meter a bordo e respectivo peso? Qual é o aeroporto internacional mais próximo de Curitiba? Estão a preparar algum tipo de apoio- combustivel, gás, oleo, baterias, facilidades de alojamento, transportes.....- a pilotos que possam ir da Europa? Que formalidades são necessárias na alfandega para fazer a importação temporária dos aviões e radios? Bem, qualquer outro assunto que aches pertinente para se poder ponderar a possibilidade de estar presente na vossa prova, que, ao que sei, é unica no mundo! FORÇA E CUMPRIMENTOS
Posted on: 2/4/2007 11:54 AM by Author "JMCJET" in the forum "RC Jets"
http://www.rcuniverse.com/forum/fb.asp?m=5369484

RE: Merry Chrismas and Happy New Year 2007
[>:][>:][>:][>:] YES CHARLES(ITO) . I am still waiting you to fly... FELIZ NATAL TAMBEM PARA TI E PARA AS TUAS PEQUENITAS. [8D][8D][8D]
Posted on: 12/16/2006 7:09 PM by Author "JMCJET" in the forum "RC Jets"
http://www.rcuniverse.com/forum/fb.asp?m=5124168

RE: CHERCHE PHOTOS DE FOUGA MAGISTERE
[8D][8D][8D] Thank you for the input. The purpose of write in French was, is, the hope of someone in France, living near a museum or a base where a fouga could be in display, could read it and be kind enough to take the pictures as the guys of jwm wants them... The fouga is build, what is missing is the documentation for static judgment. Any link to a French forum would help too Regards
Posted on: 12/6/2006 12:57 PM by Author "JMCJET" in the forum "RC Jets"
http://www.rcuniverse.com/forum/fb.asp?m=5082692

CHERCHE PHOTOS DE FOUGA MAGISTERE
Salut Je cherche photos de fouga magistere de la patrouille de France, pour faire dossier "estatic" pour le jwm en Irlande. Est que il y a quelquen qui pourra m`aider a obtenir ces photos? Merci
Posted on: 12/5/2006 7:07 PM by Author "JMCJET" in the forum "RC Jets"
http://www.rcuniverse.com/forum/fb.asp?m=5079779

RE: SUPER HORNET does 360 on landing
[>:][>:] The guys from IJMC would not appreciate very much this landing, because the landing run was not straight, one or more tires collapse after touch down... You see, overall flight realism must be considered !!!!
Posted on: 11/13/2006 6:24 PM by Author "JMCJET" in the forum "RC Jets"
http://www.rcuniverse.com/forum/fb.asp?m=4991601

RE: MAS Products?
Yes! Where is MAS? I´m still waiting the clear canopy for Vigilante... Is MAS still running?
Posted on: 10/22/2006 12:59 PM by Author "JMCJET" in the forum "RC Jets"
http://www.rcuniverse.com/forum/fb.asp?m=4900043

early P-160
Hello: I have a JC P-160 stored in the box since i purchase it some years ago. i heard that this engines had troubles, but i don´t know what kind of troubles should expect. Does anyone knows something about the matter? any help will be welcome regards
Posted on: 10/8/2006 12:18 PM by Author "JMCJET" in the forum "RC Jets"
http://www.rcuniverse.com/forum/fb.asp?m=4841989

RE: This can happen when you do not have a fire extinguisher
Yes! Starting an enclosed turbine is always a act of courage. It happened to me: Preparing the maiden flight of a f-8 crusader, we check and test everything several times. Everything was OK. Then we mount the wing and started the engine. The starter blows, ignition,acceleration, ... the starter fails and a big fire began. We were prepared and the guy with the extinguisher pulled the trigger. Two seconds were enough to kill the fire. It was the first time i had a starter failure in seven years of turbine's practice... What do you know about inboard extinguishers? Is there someway of make things safer with enclosed engines? Regards
Posted on: 8/29/2006 9:24 PM by Author "JMCJET" in the forum "RC Jets"
http://www.rcuniverse.com/forum/fb.asp?m=4686912

RE: JL F-18 modification
[sm=49_49.gif][sm=49_49.gif] Pois,pois, Carlitos... Como diz o teu pai: É só ordenador, é só ordenador, como c... vá a tener os aviones listos? [>:][>:][>:] Vamos encontrar-nos na Irlanda?[sm=shades_smile.gif]
Posted on: 8/25/2006 8:36 PM by Author "JMCJET" in the forum "RC Jets"
http://www.rcuniverse.com/forum/fb.asp?m=4670017