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SUPER Quick Delta Scratch Build

Old 03-23-2007, 04:46 AM
  #151  
CHELLIE
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Default Stronger lipos

Originally Posted by BatteriesIncluded View Post
Agree on both counts. brushless stuff is on its way. shopping for STRONGER Lipo's now.

Hi BattInc check out heads up rc for lipos, they are high c rated, heavy duty, I like his 1650mah 3 cell, take care, Chellie

http://cgi.ebay.com/2409-12T-Outrunn...QQcmdZViewItem
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Old 03-23-2007, 02:46 PM
  #152  
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Originally Posted by CHELLIE View Post
Hi BattInc check out heads up rc for lipos, they are high c rated, heavy duty, I like his 1650mah 3 cell, take care, Chellie

http://cgi.ebay.com/2409-12T-Outrunn...QQcmdZViewItem

I've been saving some MAD money and finally decided to break open the piggy bank yesterday. I just ordered a 1650 2 cell ans a 2000 3 cell from commonsenserc so that should take care of my immediate battery needs. I ordered quite a few things from Jeff at HeadsupRC also and he threw in free shipping after I emailed him with an enquiry about the ESC he carries. I wound up buying the 30 Amp from him and quite a few servos and other misc things. I then called Jay at GITech and purchased a 2408-21 with the propsaver mod built in. I have a few other things from BPHobbies on the way. I should have a good range of motors and electronics now to play with. I wish batteries were as cheap as the rest of the electronics!
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Old 03-23-2007, 03:14 PM
  #153  
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Well the good thing about the batteries is if you use a balancer and time your flights so you don't run them down to cutoff they last a long time
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Old 03-23-2007, 04:37 PM
  #154  
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Originally Posted by BatteriesIncluded View Post
I've been saving some MAD money and finally decided to break open the piggy bank yesterday. I just ordered a 1650 2 cell ans a 2000 3 cell from commonsenserc so that should take care of my immediate battery needs. I ordered quite a few things from Jeff at HeadsupRC also and he threw in free shipping after I emailed him with an enquiry about the ESC he carries. I wound up buying the 30 Amp from him and quite a few servos and other misc things. I then called Jay at GITech and purchased a 2408-21 with the propsaver mod built in. I have a few other things from BPHobbies on the way. I should have a good range of motors and electronics now to play with. I wish batteries were as cheap as the rest of the electronics!
Thanks Battinc!

I will personally QC and hand select one for you! I'll make sure you GIT one with the round magnets and I will send you that Alluminum Heat Sink Stick Mount you asked about for free as well.

Let me know if you have any more ???

TTYL,
Jay
GITaHobby.com
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Old 03-23-2007, 08:49 PM
  #155  
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Originally Posted by BatteriesIncluded View Post
I've been saving some MAD money and finally decided to break open the piggy bank yesterday. I just ordered a 1650 2 cell ans a 2000 3 cell from commonsenserc so that should take care of my immediate battery needs. I ordered quite a few things from Jeff at HeadsupRC also and he threw in free shipping after I emailed him with an enquiry about the ESC he carries. I wound up buying the 30 Amp from him and quite a few servos and other misc things. I then called Jay at GITech and purchased a 2408-21 with the propsaver mod built in. I have a few other things from BPHobbies on the way. I should have a good range of motors and electronics now to play with. I wish batteries were as cheap as the rest of the electronics!
cool your just about set to have some fun Take care, Chellie
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Old 03-24-2007, 07:16 PM
  #156  
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How much up do you have on your elevons? Everyone keeps mentioning a couple of clicks up and then there is Doyles thread that talks of needing up. One more thing is, 3/8 up and down is good for travel right?
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Old 03-24-2007, 09:21 PM
  #157  
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Is that total travel 3/4" servo end to end, measured at the elevon's edge? If it is, It too small. If you have flying eperience try 2" up and down - 4" total . Flying wings ,usual, need a slight up elevator built in, it's called reflex. That whats ment by a couple of clicks of up trim on the transmitter this give a needed slight up elevator.
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Old 03-24-2007, 09:57 PM
  #158  
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2" travel sounds like a lot. I can fly 4 ch and do simple aerobatics no problem. If I can just get past the panic mode when something goes wrong I would consider myself a decent pilot.:o Don't know if I would want wild control throw for the maiden, I'm already a little nervous.:p
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Old 03-24-2007, 11:29 PM
  #159  
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Originally Posted by smokejohnson View Post
How much up do you have on your elevons? Everyone keeps mentioning a couple of clicks up and then there is Doyles thread that talks of needing up. One more thing is, 3/8 up and down is good for travel right?
Hi Smoke yes 3/8" up and 3/8 down works great for a total of 3/4", you dont need to go more than that, I would not use more than 1/2" up & 1/2 "down for a total of 1" and when launching, add 2 clicks up trim from neutral position on the elevons, and on a delta, keep the nose up Take care, Chellie
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Old 03-24-2007, 11:34 PM
  #160  
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Originally Posted by smokejohnson View Post
2" travel sounds like a lot. I can fly 4 ch and do simple aerobatics no problem. If I can just get past the panic mode when something goes wrong I would consider myself a decent pilot.:o Don't know if I would want wild control throw for the maiden, I'm already a little nervous.:p

Hi Smoke dont panic, its just foam If things go wrong, I just cut the power and add full up, and hope for the best Take care, Chellie
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Old 03-25-2007, 06:08 AM
  #161  
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Well, this weekend I took the delta that I built and literally took it apart, soaked it, took the "skin" off, and put it back together. The complete delta w/o electronics now weighs 1.9 oz. (with CF reinforcing) Very big difference from the 5 oz. w/ the skin on! I now have a GWS 350 B-gear motor and the 8x6 prop reccomended by Kosh that I plan on using with a 2S 1650 mAh LiPo. The CG already "feels" different than my first attempt and it does a nice down sloping free guide. I've really gotten alot out of this piece of foam. Now, back to work.
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Old 03-25-2007, 08:04 AM
  #162  
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With the 350 B geared motor {Same as the Warbirds} you should be looking at speeds around 45 to 50mph with only a 9 amp power draw at full. Fly it for 5 minutes the first time and check your motor temp, If it too hot to touch let it cool a few and toss it back up. I bet it will fly at 1/3 throttle easy so best of luck on your maiden.
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Old 03-25-2007, 04:05 PM
  #163  
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Originally Posted by Kosh View Post
With the 350 B geared motor {Same as the Warbirds} you should be looking at speeds around 45 to 50mph with only a 9 amp power draw at full. Fly it for 5 minutes the first time and check your motor temp, If it too hot to touch let it cool a few and toss it back up. I bet it will fly at 1/3 throttle easy so best of luck on your maiden.
Hope I can handle it! I also have a 2408-21 brushless on the way. I might swap it out on the delta or just build something else for it, not sure. How would one of thos Esskay 400XT brushless motors work on these deltas? They are on sale for $17.90 at Hobby-Lobby and seem like a good buy. Might work great on a slow stick too.
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Old 03-25-2007, 07:49 PM
  #164  
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Originally Posted by BatteriesIncluded View Post
Hope I can handle it! I also have a 2408-21 brushless on the way. I might swap it out on the delta or just build something else for it, not sure. How would one of thos Esskay 400XT brushless motors work on these deltas? They are on sale for $17.90 at Hobby-Lobby and seem like a good buy. Might work great on a slow stick too.
Hi Gary the Esskay will work fine with a 2 or 3 cell, on a delta, dont know if it will be enought power for a slow stick or not, on a slow stick I use a 2410-09 from Heads up RC, they are only $12.00 cheap like me and it will swing a 11x4.7 prop with no problem, use a 30amp ESC in everything, and you will never have a ESC problem, its a over kill but cheap insurance, the 2408-21 is a great little motor, with a 8x4 prop to start with, it wont be too fast with that prop, take care, Chellie

Last edited by CHELLIE; 03-25-2007 at 08:37 PM. Reason: spell ck, my comp cant spell very well :)
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Old 03-26-2007, 03:13 AM
  #165  
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My frustrations with this delta continue. I rebuilt the entire thing, had the suggested motor and prop, started CG at 6" from the nose, and followed all suggestions on launch. It moves really fast but unfortunately only 10 feet and straight into the ground (AGAIN). Another broken prop. I must be doing something wrong that I just can't get right. I think I've got to step back from this one for awhile.
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Old 03-26-2007, 03:20 AM
  #166  
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Originally Posted by BatteriesIncluded View Post
My frustrations with this delta continue. I rebuilt the entire thing, had the suggested motor and prop, started CG at 6" from the nose, and followed all suggestions on launch. It moves really fast but unfortunately only 10 feet and straight into the ground (AGAIN). Another broken prop. I must be doing something wrong that I just can't get right. I think I've got to step back from this one for awhile.

Hi Gary give it 2 or 3 clicks of up trim before launch, look at your elevons, make sure there is some up to it, give it a good toss at about a 15 to 20 degree angle up from level, after you toss it, give it some up input, launch at 3/4 to full throttle, Hope that helps, Chellie

ps you might not have enough thrust at launch if you are using a brush motor, thats the only thing that I can think of why its nose diving on you, moving the CG back with a brush motor may help. with the brushless motor, you can just about hover with it, and it should just take off on you.
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Old 03-26-2007, 04:05 AM
  #167  
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Hi Gary I was just thinking, what could you be doing different than me on launch, then when you said it was only going 10 feet then nose diving, I think I figured it out, I give my delta a hard toss, and with out the motor on, it will coast about 25 to 30 feet, I think you might be giving it a gental toss, not allowing it to gain air speed right away, try giving it a hard toss, pointed up about 15 to 20 degrees from level. hope that helps, Chellie
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Old 03-26-2007, 04:32 AM
  #168  
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FWIW Gary I built an STC and was having flying problems with it. Didn't want to glide and ballooned under WOT. I decided to do the glide test and after about 30 minutes of tweakin' it she flew great. I took the prop off and gave it a good toss into the wind. At first it was falling to one side and nosing in. After several adjustments it would glide out 20' or so and gently touch down on it's gear.

Just an idea.
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Old 03-26-2007, 04:49 AM
  #169  
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I'm on delta 2 now I took the first one out to field for glide testing
started with the cg at 5.5 instant nose dive then about 7.5 it started to glide at 8 it was doing real well so now I have a starting point for the new build
Clear is going on now then I'll glue and rig it and the dreaded maiden
hopfully with the new cg I can have better luck
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Old 03-26-2007, 04:57 AM
  #170  
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Mine's ready for maiden. Went with what I had on hand. GWS350C with the C gear swinging a 10x4.5 that came with my YardStik. It gave good performance on it and my STC so it should work. I have a 1000mAh 7.4 Electric Power lipo with a GWS esc.
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Old 03-26-2007, 05:31 AM
  #171  
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Here's a pic, just in case. After watching the video in the club forum of Kosh flying his I don't know if I can fly it or not. Hopefully he had them set up to do this. If my roll rate is going to be anything close to that I'm in trouble.
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Old 03-26-2007, 05:41 AM
  #172  
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Originally Posted by smokejohnson View Post
FWIW Gary I built an STC and was having flying problems with it. Didn't want to glide and ballooned under WOT. I decided to do the glide test and after about 30 minutes of tweakin' it she flew great. I took the prop off and gave it a good toss into the wind. At first it was falling to one side and nosing in. After several adjustments it would glide out 20' or so and gently touch down on it's gear.

Just an idea.
Kewl thats what it takes, some tweaking in, once you have found the sweet spot CG, glue a string about 4 inches long at that point, so you can always come back to it after changing batteries, also it helps to get you lateral balance after changing batteries, Deltas are a little different animal thats for sure, it takes some getting use to, Good luck to you all, Chellie
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Old 03-26-2007, 05:56 AM
  #173  
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One thing to look at I have been all over the web looking at deltas and most that are 22-23 inches long have wing spans over 24'' closer to 27
I'm sure that change how they fly
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Old 03-26-2007, 06:02 AM
  #174  
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Originally Posted by CHELLIE View Post
Hi Gary I was just thinking, what could you be doing different than me on launch, then when you said it was only going 10 feet then nose diving, I think I figured it out, I give my delta a hard toss, and with out the motor on, it will coast about 25 to 30 feet, I think you might be giving it a gental toss, not allowing it to gain air speed right away, try giving it a hard toss, pointed up about 15 to 20 degrees from level. hope that helps, Chellie
Hand launch was done correctly and at full throttle, slight up on the controls. Lateral balance is good. It MUST be CG. I have to do some repairs before I do some glide testing. I have several other projects I want to get to so I may just stop work on this and step back from it for a few days. Surprising how you can solve a problem by getting away from it for awhile and then coming back to it later. It's the "why didn't I see that before?" method. Oh well.
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Old 03-26-2007, 06:09 AM
  #175  
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Originally Posted by BatteriesIncluded View Post
Hand launch was done correctly and at full throttle, slight up on the controls. Lateral balance is good. It MUST be CG. I have to do some repairs before I do some glide testing. I have several other projects I want to get to so I may just stop work on this and step back from it for a few days. Surprising how you can solve a problem by getting away from it for awhile and then coming back to it later. It's the "why didn't I see that before?" method. Oh well.
Hang in there you will get it its something simple, always is soon you are going to be another expert on deltas I am not a expert yet, but I am getting there :p take care, Chellie
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