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Old May 29, 2004, 12:21 AM
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I need help with buying high start

hello, I realy dont understand in that subject. i have a beginer glider with wing span of 1.4m but i am gonna buy a nice 2.5m glider so would you recommand on that
http://www2.towerhobbies.com/cgi-bin...?&I=LXE638&P=7
by what i read it sound ok for my two glider.

maybe there are some better than that in the same price ?,i cant spend more thatn 35-40$.
thank you.
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Old May 29, 2004, 05:35 AM
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The link you provided is for an Upstart only. This will launch your plane to 200 - 300 feet. This is OK if you are an expert glider flier and know how to launch into thermals. If not, it will leave you frustrated by the short length of your flights. You need to spend some more money and buy a Histart - look for 300-400 feet of line plus 100 feet of rubber. (the one you linked has 25 feet of rubber) The dynaflite histart at http://www2.towerhobbies.com/cgi-bin...?&I=LXE635&P=7 is $55 from Tower - many consider this the minimum cost of entry into a histart. You do not mention where you live, but if it is anywhere sunny and where the ground is rough (e.g. Arizona, CA desert) then you may not like how long this histart lasts.

If you plan on staying with this hobby for any length of time may I recommend you spend another $20 and get a Hosemonster 2M histart? They are of the highest quality and will last quite a few years:

http://www.aerofoam.com/hosemonster.html

If you can't spend more than $35 the upstart you mentioned is fine for your beginner glider with 1.4m wingspan. It will *not* lift the "nice" 2.5m glider very well. How about spending the money on the histart now, learning to fly your 1.4m plane properly and save up some money for the nicer glider next season? It took me 2 years of flying my EPP foam 2M Highlander before I saved enough money for the bigger glider - I needed to keep both new and old gliders flyable, so I had to save for the radio gear as well.
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Old May 29, 2004, 05:54 AM
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I live in israel, i understand what you said and maybe it is really better idea to buy the dynaflite highstart, i think i am going to stay in flying sailplanes. i have a question about the dynaflite highstart, how much space do i need for that ? i didn't understand from the website.anyway,thank you for your answear
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Old May 29, 2004, 05:15 PM
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You need 400 feet just for the histart, and then you will need another 300 feet to stretch it. So 700 - 800 feet or so.
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Old May 29, 2004, 07:41 PM
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Quote:
Originally Posted by lamborghini
hello, I realy dont understand in that subject. i have a beginer glider with wing span of 1.4m but i am gonna buy a nice 2.5m glider so would you recommand on that
http://www2.towerhobbies.com/cgi-bin...?&I=LXE638&P=7
by what i read it sound ok for my two glider.

maybe there are some better than that in the same price ?,i cant spend more thatn 35-40$.
thank you.
Everything depends on your budget, the size of the field where you launch and your goals.

This up-upstart has a 3/16 inch ID and 5/16 inch OD and 200 feet of line. It would be fine for your 1.4 meter glider. Since your plane is light, probably under 25 ounces, if you have any kind of breeze, say 2 to 4 mph (3-6 km/h) you should get those 150-300 foot launches. While you always want to be higher, that would be fine for thermal hunting, especially if the air is hot and dry, as I believe is common in your country.

With the 1.4M, If you have 5-7 mph wind, you may even be able to add another 50- 100 feet of line, since it is so light, and get even higher launches.

As to a 2.5 M, 100 inch plane. In calm conditions, say under 5 mph winds, this launcher will probably have trouble getting the plane up to 200 feet. There just isn't enough elastic.

This is the full size hi-start from Tower:
http://www2.towerhobbies.com/cgi-bin...?&I=LXE636&P=7

This is $60, or a shade more than double the price, but you get 4 times the elastic. If you really want to get a 2.5M plane, and if you have the room, and can spend the extra money, go for this one.

If you don't have 800 feet, (about 250 meters) which is what this full size hi-start requires, then you can cut the tubing into two sections and make a longer launcher and a smaller launcher. Just an idea.

The hose monster mentioned above has a great reputation in the make.

Of course you an make your own hi-start. Get surgical tubing/latex tubing, add line, add a couple of rings, one for staking it to the ground and one to attach to the plane. and you have a hi-start. If you take an old hat and cut off the brim you can make your own parachute. as well. I did it. Easy!

Here are some photos of the hat/parachute I made.
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Old May 30, 2004, 02:08 AM
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since i dont live in u.s, there is problem with the customer service and the warranty, i heard good things about the international customer service of tower hobbies so i think i will order only from them so there is diffrent between:
http://www2.towerhobbies.com/cgi-bi...p?&I=LXE636&P=7


http://www2.towerhobbies.com/cgi-bi...p?&I=LXE635&P=7
?
and another question, i think that my field has maybe 100m-200m(max) so i guss i will need to cut it, it's ok to cut it ? will it still lunch the 2.5-3.0m to a good height ?
thanks
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Old May 30, 2004, 03:50 AM
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Of course you would use the international site. Sorry for the U.S. based link.

These links will be helpful. One explains hi-starts. The others are launch videos.

What is a Hi-Start
http://www.labyrinth.net.au/~learmont/HiStart.html

Videos of actual hi-start launches
http://portfox.rchomepage.com/galler...pp3-launch.wmv
http://www.rcgroups.com/articles/lif...r/ava/Ava1.wmv

The up-start you originally asked about is sized for a 100M field. If the field is larger, say 150 meters, then with the 1.4 meter plane you said you have should be fine and should get 50-75M launches.

The difference between launching a 1.4 M plane and a 3M plane is very very large. This launcher would be weak on a 3M plane. It would be hard to buy one that would be a very good fit all the way from a 1.4M plane to a 3M plane.

My best advice, considering you are not sure of field size, you say you have limited funds, and today you only have the 1.4 meter plane would be to get the heavy duty upstart. The up-start would be good for 1.4 and 2M planes. It will launch a 2.5M plane but not as well as the 1.4 M plane. It will be weak for a 3M plane but will put it in the air.

If you want full height launches of 150 to 180 meters you need a full size hi-start which means you need to build or buy a full size hi-start. You would need a field size of 250-275 meters to fully utilize it. The shorter upstart will not give you full height launches of 150-180 meters.

Money is always an issue. If you can afford the larger hi-start you can always cut it down to meet your needs. With the 2.5 and 3M planes you could double the tubing if you felt is was a bit weak. If the smaller one is not big enough for the larger planes you will have to buy a new one when you get the larger plane, if you ever do get the larger palne.

You get what you pay for.
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Last edited by aeajr; May 30, 2004 at 04:04 AM.
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Old May 30, 2004, 04:30 AM
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If you are quick and lucky you might get this full size hi-start at a great price slightly used from a guy on e-bay.

http://cgi.ebay.com/ws/eBayISAPI.dll...tem=5900427808
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Old May 30, 2004, 05:13 AM
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well, thank you for the answear. the ebay guy ship only to us.
I just didn't understand something, if i cut the dynaflite (heavy duty) so it will fit to 100m filed, will it still be strong high start as it was ? if not,will i be able to fix it(maybe buy new rubber) ?
and just for comperation, which one is better for 2m-2.5m ?
http://www.nesail.com/detail.php?pro...7214f921a18384

http://www2.towerhobbies.com/cgi-bin...?&I=LXE636&P=7
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Old May 30, 2004, 09:04 AM
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Strength

The strength of the hi-start, which is important to the size of the plane, is determined by the diamater of the rubber and the thickness of the walls, not the length. This is most important to the size of the plane it can launch.

A hi-start that is perfect for a 2 meter would be a little strong for a 1.4 but would be quite workable. It would be weak for a 3 meter. It would launch, but not as well as one sized for a 3 Meter plane. But the 3 meter hi-start would be too strong for the 1.4 and might damage it if you pulled it back far enough. That is why a hi-start for a 1.4 meter plane would not be good for a 3 meter plane.

Length and height

The length determines how long, in distance and time, the pull will be and how high it can take you.

So, if your field is 150 meters you would want about 20-30 meters of elastic tubing. Let's say 25. Add 3-4 times the elastic in line. Leave enough room to pull the elastic tubing 2-4 times its length, depending on the quality of the elastic.

25 meters of elastic pulls to between 75-100 meters (relaxed + stretch) - let's say 75 meters.

You would add 75 meters of line to reach the 150 meter length of the field. That would be about as large a hi-start as you could use. You can vary the ratio of line to elastic but I would not go below 2 to 1. Mine are at 4 to 1.

The max height you could reach would be the length of the line plus the length of the relaxed elastic. In this example that would be 25 meters for the elastic and 75 meters for the line or about 100 meters. A skilled launcher might be able to zoom off the end and gain another 20-30 meters in height.

Did you read the link I posted on hi-starts?

What is a Hi-Start
http://www.labyrinth.net.au/~learmont/HiStart.html

In the June issue of the internet magazine www.RCezine,com I will be publishing an article on hi-starts and how to use them. It will be available June 2.

Good luck!
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Old May 30, 2004, 09:06 AM
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In relation to the two hi-starts you asked about, I like the NE Sailplanes Pinnical better. I think the tubing is better quality and the overall unit is better quality and should last longer. The reels and parachutes are better as well.

That would be the proper size for you. Either one would work for you.
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Old May 30, 2004, 09:36 AM
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ok thank you and i read the link you posted. what i decided is to buy the first high start i wrote(up-start) for my 1.4m and after i will be ready for my second sailplane i will buy a stronger high start for him, i think it will be the NE Sailplanes Pinnical depending on what i will buy, by the way the 2.5m i planned to buy is:
http://www.nesail.com/detail.php?productID=68
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Old May 30, 2004, 03:48 PM
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I have heard great things about the Kestral 100. I think you have selected a winner. I also think your plane to buy a larger high start when you get that plane is the right one.

Good luck with your flying. We are here to help you whenever you need us.
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Old May 31, 2004, 02:06 AM
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thanks
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Old May 31, 2004, 03:30 AM
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Quote:
Originally Posted by lamborghini
hello, I realy dont understand in that subject. i have a beginer glider with wing span of 1.4m but i am gonna buy a nice 2.5m glider so would you recommand on that
http://www2.towerhobbies.com/cgi-bin...?&I=LXE638&P=7
by what i read it sound ok for my two glider.

maybe there are some better than that in the same price ?,i cant spend more thatn 35-40$.
thank you.
What glider are you flying. I never asked. I am curious.
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