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Top Flite B-25 ARF (Tecnical, tips, suggestions)

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Top Flite B-25 ARF (Tecnical, tips, suggestions)

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Old 12-15-2007, 05:13 PM
  #801  
timothy thompson
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Default RE: Top Flite B-25 ARF (Tecnical, tips, suggestions)

FOR NORMAN![8D] there ya go spinner nut from kit will not fit threads and this prop is a 14 not a 16. i powered up with a 3s 5000 just to test and it blew around like a hurricane. No worrys that my leccy setup will fly this plane



anyone know can i charge lipos in a cold garage?????
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Old 12-15-2007, 06:23 PM
  #802  
timothy thompson
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Default RE: Top Flite B-25 ARF (Tecnical, tips, suggestions)

has anyone had issues with the nose wheel being l little too big and getting stuck? i can put a 2in on
Old 12-15-2007, 06:32 PM
  #803  
Jon Wise
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Default RE: Top Flite B-25 ARF (Tecnical, tips, suggestions)


ORIGINAL: timothy thompson

mine were off alittle but i fixed them. ill add our weather report up to 18 inches ! we will get flurries

well theya re sticking to the big snow forcast! ill got to lhs for a y harness i am working on the other nacelle sequencing and god why does jb weld take all day to set? IT STRONG SO ILL BE OK. i thnk ill use the kit wheels as 300 would go a long way towards the wingspan b-17. My cam has a video setting and a can watch it is there anyway to use the sim card and show you guys the door sequencer. pics wont do it justice


NORMAN THE FAKE RADIALS ARE ALMOST DONE IM GOING TO POWER UP THE AXIS TO MAKE SURE THEY ROTATE CORRECT THEN SHRINK TUBE ALL CONNECTIONS AND PUT THE RADIALS ON. SORRY I HAD TO CUT A LOT OUT OF THE CENTER FOR THE ROTATING CAN.
Snow what's that? We haven't had hardly any. I would usally have 2-3 feet in my yard by now. I have less than 2". Wish it would snow alot. Thanks for the answer on the formers. It just makes me wonder what else is wrong on this plane, although it does look good. Nothing sticks out as being wrong with it. Thanks Jon
Old 12-15-2007, 09:02 PM
  #804  
norm
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Default RE: Top Flite B-25 ARF (Tecnical, tips, suggestions)

Hey Tim,

There ya go! Looks better but does it sound better? It is impressive to see hear you spin a 14 inch prop. What is the pitch and at what rpm? My buddy flew a Sundowner formula 1 1.20 with a Moki 210 and converted it to electric I do not know what but the thing sounds good and WHIZZZ by at impressive speed.

Nevertheless I still like to get greassy dirty and deafening soundn with my glows.

The snow must have invaded you by now..not bad in a 2 week time 12 inch + 4 +3 + 15 tomorow that makes 34 inch so far at this time of the year...My pool disapeared and it is -17 here ( +/- -2f)...this year beats me, I'm starting a P-47 TF GS with Saito 450R3 (Kelvin @ Keleo creations is making me a "loud" special edition muffler ring)

My snow blower is burning more fuel than my planes at this time.

For your noze wheel the 2.75 fits well there. Check if you have the correct robart part# and that you do not have the H9 noze gear...
Old 12-15-2007, 09:11 PM
  #805  
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Default RE: Top Flite B-25 ARF (Tecnical, tips, suggestions)

Tim,
The Axi-4130's takes a 8/1mm prop nut.

I got mine from TruTurn for the great price of around $10 each.

They were the cheapest things I put on this bird.

Don
Old 12-15-2007, 09:26 PM
  #806  
timothy thompson
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Default RE: Top Flite B-25 ARF (Tecnical, tips, suggestions)

can i charge lipos in the cold garage. ya tru turn is a great company. i would like to get it powder c oated yellow but then the threads get it. ill spray yellow . Im waiting on the air tanks and spool valve to come in. i am using a ems jomar door sequencer and that works great and looks so much better when the wheels are down. less than 50 bucks. EMS JOMAR
Old 12-15-2007, 09:38 PM
  #807  
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Default RE: Top Flite B-25 ARF (Tecnical, tips, suggestions)

Tim,

Although I am switching to A-123's as much as possible I probably have 50 to 75 LiPos.
You can charge them in your cold garage but my concern would be monitoring them during the charge cycle.

I know folks think it's safer to charge in a building other than the house but all my charging is done in my workshop where I can keep an eye on everything.

I like the idea of charging while I'm working on something else so I can listen, smell, and hear what's going on.

Don
Old 12-15-2007, 09:47 PM
  #808  
timothy thompson
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Default RE: Top Flite B-25 ARF (Tecnical, tips, suggestions)

you know ive never had a problem. Most fires are shorts or guys using bad packs aFter crashes or wrong setting on the charger. i have a triton and an electrifly that does 4 at a time. then i have a balancer. The only bad part of leccy is you get one flight a day unless you buy a entire other lipo set. I use proginy cells and love them they are very inexpensive but rival TP in output. What type of cell is the a123 I see a lot of guys buying dewalt power packs made for tools to get these. they are big and heavy and only come in one size. ill stick to my reg lipos. Im happy with 7-10 min flight any longer and i need a break anyway
Old 12-15-2007, 10:01 PM
  #809  
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Default RE: Top Flite B-25 ARF (Tecnical, tips, suggestions)

Tim,

They are Lithium Ion cells from the DeWalt packs( 10 cells per pack).
3.6V
Can be charged at up to 10-15AMPS so you can recharge your packs in 15-20 min.
WILL NOT CATCH FIRE. Ask me how I know.
They weigh more than LiPos but way less than NiCads or Nimah.
You can beat the hell out of these guys and they just keep on going.

BTW; Your build looks great.

Don
Old 12-15-2007, 11:07 PM
  #810  
timothy thompson
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Default RE: Top Flite B-25 ARF (Tecnical, tips, suggestions)

thanks ill look into those batts in the future. Ive just never had any issues. I did short a pack very briefly but it is ok. That happened 2 years ago and it still flys my 777 edf
Old 12-16-2007, 06:18 AM
  #811  
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Default RE: Top Flite B-25 ARF (Tecnical, tips, suggestions)

found this whilst browsing - some helpful details

http://www.clubhyper.com/reference/b...loseupts_1.htm

Cam
Old 12-16-2007, 04:46 PM
  #812  
sgoen
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Default RE: Top Flite B-25 ARF (Tecnical, tips, suggestions)

can several of you, post pics of where your rx is located. I am going to use a power expander in my B-25. It is to big to fit where the plans say to put the rx. I will not have to use any Y conecters then.
Old 12-16-2007, 10:03 PM
  #813  
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Default RE: Top Flite B-25 ARF (Tecnical, tips, suggestions)

Tim,
You had mentioned powder coating the prop nuts but said the powder coat would get into the threads.

Can't you put a dummy 8mm bolt in during the process to keep the threads clean?

Don
Old 12-16-2007, 10:56 PM
  #814  
timothy thompson
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Default RE: Top Flite B-25 ARF (Tecnical, tips, suggestions)

hmm good idea
Old 12-17-2007, 12:52 PM
  #815  
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Default RE: Top Flite B-25 ARF (Tecnical, tips, suggestions)

Hello Tim,
Did you test your power system. I am using E Flight Power 60's which are equivalent to AXI 4130/16. I am using Graupner 15x8 3 blade props. I have about 1" of clearance. Just enough, I fly on short grass, so I will have green tipped blades and I will mow the grass on takeoff. Using 6 cell TP 3300mah 22c batteries I am drawing 49A each. This equates to about 1000Watts per side which will work well for a 20lb plane.
I made a removable battery tray and placed the rx on a shelf below it. I am using a 11.1V 1320mah battery through a Kool Flight BEC to power the servos. It will be an easy field setup. I just have to pull off the canopy and the batteries are right there, I don't have to do anything under the plane.


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Old 12-17-2007, 02:20 PM
  #816  
diverdon
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Default RE: Top Flite B-25 ARF (Tecnical, tips, suggestions)

Mike,

I'm running 4130/16's with 7cell A-123's on a MAS 14x10x3 (cut down a 16x10x3)

Pulling 87 Amps with both motors.

Looks like your close to being ready, except for the weather.

I spent the last 2 days doing lights.

Don
Old 12-17-2007, 03:14 PM
  #817  
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Default RE: Top Flite B-25 ARF (Tecnical, tips, suggestions)

Hello Don,
I originally had planned to use MAS 16x10 right and left rotation, but they were too big. I could go to 7 lipoly cells, but then I will probably need to go to 14x7 props. Anyway you are right, it is going to be a while before I get to try this thing out. Last winter was alot warmer than normal, this year is colder than normal. At least I don't need to make repairs!
Mike
Old 12-17-2007, 03:18 PM
  #818  
timothy thompson
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Default RE: Top Flite B-25 ARF (Tecnical, tips, suggestions)

sure did with two uncharged 3s 5000mah packs for just a second to confirm rotation so I could put the cowls on and wow the power was unbelievable at 3s. Imagine a fully charged 6s 10,000 2P setup wot in the house not adviseable. Im running my air lines and got both sides of sequencing doors working fine. Now im waiting for my air tanks and such. i need to put 3 small tanks yd together as i cant fit a big tank in (dont ask me why I got into detailing and forgot the air tank. also using 16x10 3 blades
Old 12-17-2007, 03:48 PM
  #819  
mike-rc
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Default RE: Top Flite B-25 ARF (Tecnical, tips, suggestions)

Tim,
If you use 16x10 props you will have .5 in clearance with uncompressed gear. If the gear compresses during landing you will have less than 0.
Mike
Old 12-17-2007, 04:25 PM
  #820  
timothy thompson
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Default RE: Top Flite B-25 ARF (Tecnical, tips, suggestions)

i thought of that too i may go to 15in i have a set of 14s here
Old 12-17-2007, 04:30 PM
  #821  
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Default RE: Top Flite B-25 ARF (Tecnical, tips, suggestions)

The 16x10x3's that I used were cut down to 14's and are counter rotating.

I wanted to get the 10 to bump up the pitch speed a notch.

I agree with Mike, I don't think you can run 16's unless you know something that I missed.

The review in Model Airplane was running 13x8x3 on the wet version.

Don

Tim,

You posted while I was writing.
Old 12-17-2007, 04:34 PM
  #822  
timothy thompson
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Default RE: Top Flite B-25 ARF (Tecnical, tips, suggestions)

ya im glad i didnt order them ecalc says the 14s will work fine. she will be a heavy bird aroud greg hahn 22 lbs due to all the scale goodies. my 310 is 22.6 and flys fine! the weight now with everythin on except the outer wings and lipos is 17.5 . add 2,5 lbs of lipo thats 20 and the outer panels with the servos maybe a pound so im looking at a 20-22 lb birdy i just ecalced at 22 and got decent watt and amp draws at 25lbs she gets a litlle heavy. ive loaded the realflight up to 30 and she still flew so there will be no issues with my plane flynig. it will be flown scalelike. I find e calc to be very close. you need the new version with all the new motors and lipos on it. hobby lobby sells it
Old 12-18-2007, 03:22 PM
  #823  
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Default RE: Top Flite B-25 ARF (Tecnical, tips, suggestions)

Mike,

If you go to my build on RC Groups (Glow To Electric Conversions) it shows how I cut down the 16" MAS to 14" if your still interested in counter rotating props.

BTW are your landing gear leavers drilled to be taped for the ball joint?
I was looking at mine today and you are so right about the clevis hitting the end of the piston.

Do you mind if I reference your levers in my build thread?

Thanks,

Don
Old 12-18-2007, 03:51 PM
  #824  
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Default RE: Top Flite B-25 ARF (Tecnical, tips, suggestions)

Hello Don,
Thanks, I will check out how you cut down the props. I will try the 15x8 Graupners first as I already spent $40.00 on them, they seem to pull well and they look pretty scale. I originally changed my mind about counter rotating props because I thought the thrust angles were not designed for them. I still am not sure if it would matter.
That would be great if you could reference me in the other thread. I am sure there are frustrated modelers out there who could use them.
The holes in the levers are 2mm. I used balls from a heli swashplate thet had 2.5mm threads. 2mm is the correct minor diameter for a 2.5mm tap. The hole is to big for a 2mm or 2-56 screw. You might be able to drill and tap another hole next to the one already in the lever, I don't think the location is that critical.
Thanks, Mike
Old 12-18-2007, 03:55 PM
  #825  
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Default RE: Top Flite B-25 ARF (Tecnical, tips, suggestions)

Thanks Mike.

Got the lights installed on mine.

Don


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