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完美的動力飛行傘(动力伞选择的一些注意事项)

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楼主
发表于 2008-4-15 21:56 | 只看该作者 回帖奖励 |倒序浏览 |阅读模式
完美的動力飛行傘(RECOMMEND)HERE IS A GOOD PAPER TO RECOMMEND TO READ FOR PARAMOTOR FANS, REFER TOPICS  FOLLOWING:

1. What is the perfect Paramotor?
2:理想的重量?
......................


http://www.geocities.com/parataiwan/artical/perfectparamotor.htm

欢迎继续阅读楼主其他信息

沙发
 楼主| 发表于 2008-4-15 22:00 | 只看该作者
完美的動力飛行傘

The Perfect Paramotor?



1. What is the perfect Paramotor?

This is the question I have been not only asking myself but also many of my fellow pilot's, the answer it seems is there is no such thing, as it seems every pilots has his own preference's and idea's about what is and isn't a good idea, most of the good ideas are already in production - but, unfortunately, not on the same machine....Anyway below I have tried to put together a compilation of hopefully useful info; from my own idea's and experience's and also that of fellow pilots who have kindly sent me there idea's by email, many thanks to them, if anyone else would like to contribute an idea or a piece of useful info; about his or her ideal Paramotor please email it to me and I will try and include it into this page, that way we can build up a good idea of what we all would like to find as our ideal Paramotor.

The difficulty with specifying 'the perfect paramotor' is what is perfect to one isn't necessarily perfect to another.   On balance, I'm grateful for that and happy that there are a variety of designs and ideas around.  Would be boring if they were all the same, Courtesy Simon Ravine

理想的重量?

Wet motor weight with all options.? That means electric starter, Gas, harness ready to fly. no more than  27 Kg. preferably less? it is very important to get it right before you buy most dealer's never quote this weight.

My  AIRFER TORNADO was over 30 Kg wet, which I found to be too heavy, and I have worked in the construction industry for 30 years and am used to lifting heavy weights. Try to wear a weight lifters belt (about £12)when picking up heavy objects, otherwise you could find yourself paying expensive Osteopath fee's.

轉速比 ?

2. What kind of  RPM?

Motors which have a high RPM ie;9500 wear out quicker & are noisy. i.e.; Radne, /Raket. Top 80/ Falcon.although they are getting quieter as exhaust and carb; muffler technology advance's are made. The Top 80 is quite quiet by paramotoring standards - certainly quieter than a Simonini, Cors-air or Solo, Even the new Rad machines - that have an after-muffler welded onto the main pipe and an intake silencer - are significantly quieter than the older machines. courtesy Simon Ravine

Approx; 7000 RPM should be max. i.e.; Solo/simonini/and Cors-air,engines


引擎推力?

3.  Static thrust? thrust is everything in my opinion, if less than  (45Kg) & you weigh more than  (82Kg.) it is not a good match. My naked weight is 95Kg (not a pretty sight) and 135Kg all up, and my Airfer Tornado with the 21hp Cors-air engine,  a 99cm wooden prop; and 58 Kg of thrust was more than enough , and got me airborne within a couple of steps, and the climb out rate was very good. although I found the wet weight of the unit at over 30Kg,to heavy for me  especially on hot days, so I sold it. on the other hand my first Solo based unit with 4 props; was under powered and I struggled to get of the ground, this got worse after the Nylon prop; conversion , even though I had put a larger cylinder head /performance exhaust and muffler box on it. I sold that as well.


引擎的馬力 ?

4. HP of the motor? It should be any where from 17hp to 26.hp Too much power creates too much torque. Too little power well, you can't get out of bad situation fast enough. plus your be doing more running than flying, A SOLO put's out only 14Kg where as the CORS-AIR puts out 21/22Kg.

螺旋槳的尺寸?

5.   Diameter of the prop? Too small  a prop; will not give the thrust you need, since your body & harness is blocking  most of the prop. So the prop should be more than 91.Cm Unless you are a very small person.
If the prop is too large i.e. 127Cm or more, then your prop guard is too big to clear the risers in forward launch. You have to be a very good pilot to use that big  a motor. a friend of mine has a unit with a 130cm prop; and even though he is built like a giant he has struggled to master his take off's and has piled it in several time's, that unit has a standard Solo engine.14 hp and only 54 Kg of thrust, if he used the Airfer Tornado with a 99cm prop; and 21hp plus 58Kg of thrust not only  would he have more power, but also find it much easier to handle.
3
 楼主| 发表于 2008-4-15 22:10 | 只看该作者
需要電動啟動器嗎?

6. Electric start? I would not buy one without it, this is my personal preference! as they are so useful as you can launch the wing first and then just fire up the engine, turn and T/O ,(easier said than done) an optional pull or foot start is useful in case of a flat battery, although in theory if you have in-air charging you shouldn't have this problem, although unless you keep the battery trickle charging whilst not in use it will go flat, as mine used to and I wished that the Tornado had a pull start fitted as well.  


7.When the motor is cold will it start without the choke?  

Solo engine's with single spark magneto are a pain to start, although apparently OK with twin spark H.E.I.S.ignition, the CORS-AIRS M21Y engine with twin spark ignition starts first time from cold. It's a lovely engine but a bit heavy.


8.Does the motor have internal decompression. That is an old design as on the SOLO engine, which basically has a flap in front of a small hole which allows the compression to be less at startup. But the carbon built up will make this obsolete after a few hours of use. You have to take the motor apart to clean the valve. I had to do this with my Solo engine, and it was hassle, I would not buy another motor with that kind of decompression valve. Some motors are without decompression valve all together. They are the best.


9.What kind of harness does the motor come with. do they allow you to  weight shifting.  personally I like to be able to, as I trained on the hill, plus it's very useful for getting out of trouble, Sup-Air are an excellent make. I like quick-release, buckles and karabiners.

10.Hang points,  are they on the harness and not on the motor frame. On some old design's the hang points are on the frame of the motor. If due to fatigue the metal frame breaks you will separate from your motor & fall! The new design if something goes wrong the motor will fall & you stay with the wing. I personally like mid hang points, and straight distance bars as on the P.A.P and AIRFER models, as this allows you to weight shift, and have plenty of adjustment holes for setting up the unit properly on your back.
4
 楼主| 发表于 2008-4-15 22:31 | 只看该作者
11.How many cylinders should your motor have? One cylinder will do. Two & three are just smoother. But there are more parts to break & replace. plus the extra weight.
5
发表于 2008-4-17 23:49 | 只看该作者
谢谢
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