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Old Nov 01, 2007, 06:51 AM
treefinder
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SE MI
Joined Oct 2004
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DZ: Are you in Attica, MI near Lapeer? I'm in Armada east of you. (actually in New Orleans on Katrina help til sat) We should connect sometime! if the wind ever quits.
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Old Nov 01, 2007, 07:59 AM
AMA 14680
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Northern Nevada
Joined Mar 2007
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Quote:
Originally Posted by dz1sfb
Foamenator,
Is it necessary to remove the paper from the foam from the Dollar Tree? And if so, what is the best method for accomplishing that goal?

I picked up a couple of sheets and have my parts all cut out. Very inspiring this plane is. Big kudos to Tony for a great design and construction method.

Does anybody have an all up weight for the 33" model? I want to power it with an outrunner and want to be able to select based on watts per pound.

Grateful for all the contributions,
dz1sfb (Ken)
Hi Ken.. Yes you need to remove the paper. If you don't you will have trouble rolling your wing to get your airfoil, plus the paper adds a lot of weight especially if you start painting it.

Here is a link on removing the paper from Rediboard. I've tried every method I could find but the rubbing alcohol trick works like a charm. I haven't tried using the spray bottle yet (last post in the thread) but I will just as soon as I need some clean foam. http://www.rcgroups.com/forums/showthread.php?t=757496

Your finished Blubaby wont get close to the pounds measurement As you see mine in Post 60, it weights 11.9 oz all up weight. That includes the outrunner, esc, radio and 1000 mah lipo. It was way overpowered and I switched motors to a smaller one and been flying it that way ever since. Good luck with your build. You couldn't have made a better choice.

Keep the questions coming if you need to. Bob
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Old Nov 01, 2007, 06:06 PM
Slipping the Surly Bonds
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Attica, MI
Joined Dec 2006
10,395 Posts
Quote:
Originally Posted by springer
DZ: Are you in Attica, MI near Lapeer? I'm in Armada east of you. (actually in New Orleans on Katrina help til sat) We should connect sometime! if the wind ever quits.
Springer,

You've got the right place. PM me with your specific model aviation interests.

Happy BFR,
Ken
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Old Nov 01, 2007, 06:29 PM
Slipping the Surly Bonds
dz1sfb's Avatar
Attica, MI
Joined Dec 2006
10,395 Posts
Quote:
Originally Posted by Foamenator
Hi Ken.. Yes you need to remove the paper. If you don't you will have trouble rolling your wing to get your airfoil, plus the paper adds a lot of weight especially if you start painting it.

Here is a link on removing the paper from Rediboard. I've tried every method I could find but the rubbing alcohol trick works like a charm. I haven't tried using the spray bottle yet (last post in the thread) but I will just as soon as I need some clean foam. http://www.rcgroups.com/forums/showthread.php?t=757496

Your finished Blubaby wont get close to the pounds measurement As you see mine in Post 60, it weights 11.9 oz all up weight. That includes the outrunner, esc, radio and 1000 mah lipo. It was way overpowered and I switched motors to a smaller one and been flying it that way ever since. Good luck with your build. You couldn't have made a better choice.

Keep the questions coming if you need to. Bob
Thanks for the link and the alcohol tip. I tried it today with a spray bottle. This worked well on the small parts, but the larger ones need more saturation time. I will finish the wings with a large ziplock bag.

Several co-workers are geeked about this model and it looks like we will start with a fleet of four. We are making acetate templates for the parts.

Thanks again,
Ken
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Old Nov 01, 2007, 07:03 PM
Postcards From The Purple Edge
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United States, OK, Sand Springs
Joined May 2007
3,919 Posts
Quote:
Originally Posted by dz1sfb
...Several co-workers are geeked about this model and it looks like we will start with a fleet of four. We are making acetate templates for the parts.
That's so friggin' ccol. I wish I had airplane friends to play with.
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Old Nov 02, 2007, 04:47 AM
White Mountains in NH
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In the White Mountains of NH
Joined Dec 2006
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Quote:
Originally Posted by Foamenator

Here is a link on removing the paper from Rediboard. I've tried every method I could find but the rubbing alcohol trick works like a charm. I haven't tried using the spray bottle yet (last post in the thread) but I will just as soon as I need some clean foam. Bob
I just noticed that the blue foam I have been using from Lowes has a very thin layer of paper or plastic covering on one side. The BB42 is built. I am working on putting in the controls and electronics. Do I need to worry that I didn't peel the stuff off before I glued it together?

Thanks,
David
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Old Nov 02, 2007, 06:49 AM
Postcards From The Purple Edge
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United States, OK, Sand Springs
Joined May 2007
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Alright, David! Get it geared up and let's see it FLY!


Quote:
Originally Posted by dlabrie
Do I need to worry that I didn't peel the stuff off before I glued it together?
Generally not and actually it makes the foam stiffer so it's good to leave it on. In the future you may want to try to peel just the places where you need a strong, foam-to-foam bond--like where the stabs or control horns glue on or the hinge tape line on control surfaces. Do that by making very shallow cuts, just through the plastic, around the area to be glued/taped and peel it off with a pair of tweezers or such. Also you can try arranging the parts so that the plastic covered side faces outward when possible. That way you get a foam-to-foam bond on the monoblock and the plane doesn't look like it's covered in black print.

kendall
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Old Nov 04, 2007, 09:17 AM
Registered User
woodbury,ct
Joined Mar 2002
196 Posts
Survivability of Blu-Baby vs Lightflite Bug

Let me stir the thread a little and see what floats to the top.

I am anxious to get back to r/c flying after a long layoff. I have read more than
half the posts on the Blu-Baby thread (so far) and have built the fuselage
from artboard,foamboard, Readiboard, whatever you choose to call it because of difficulty
finding Bluecor fanfold. My question is the relative indestructability of the two
a/c mentioned in the title of this post.

I know that, in the re-learning to fly process, whatever a/c I choose is going to
hit the ground. I do not want to get caught up in the fly, crash, repair cycle. I
I know that the Lightflite Bug devotees swear the Bug (because of its slow fly
capability and EPP construction) is nearly crashproof.

How crashproof would a 33" w/s Blu-Baby, built from white foamcore and
powered by a Feigao motor in a GWS A gearbox, be?

Thanks for your input,
Dave
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Old Nov 04, 2007, 10:00 AM
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Northern Nevada
Joined Mar 2007
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Quote:
Originally Posted by a67ems
Let me stir the thread a little and see what floats to the top.

I am anxious to get back to r/c flying after a long layoff. I have read more than
half the posts on the Blu-Baby thread (so far) and have built the fuselage
from artboard,foamboard, Readiboard, whatever you choose to call it because of difficulty
finding Bluecor fanfold. My question is the relative indestructability of the two
a/c mentioned in the title of this post.

I know that, in the re-learning to fly process, whatever a/c I choose is going to
hit the ground. I do not want to get caught up in the fly, crash, repair cycle. I
I know that the Lightflite Bug devotees swear the Bug (because of its slow fly
capability and EPP construction) is nearly crashproof.

How crashproof would a 33" w/s Blu-Baby, built from white foamcore and
powered by a Feigao motor in a GWS A gearbox, be?

Thanks for your input,
Dave
Dave I cannot speak much about EPP as I only built one plane (Pawnee PA36) with it and I haven't crashed it yet. My Blubaby on the other hand has over 100 flights on it and it has survived a number of earth encounters of various sorts. The wing will go first, but it is easy to repair or replace. The monoblock contruction is very durable and will stand up to heavy abuse.

If you have any experience flying rc at all, I don't think you will be crashing either plane very much. Having built and flown three BluBabies, I really believe in it as a trainer. You could hand the controls to just about anybody and they will be flying it if a few minutes.

If Firstshirt sees this thread he will answer you I'm sure as he has built his BluBabies using EPP and he has built and given away quite a few of them. If he doesn't post anything here, I'm sure he wouldn't mind if you PM him and he will let you know about the EPP. At anyrate, welcome back to r/c. Bob
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Old Nov 04, 2007, 11:29 AM
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Joined Aug 2006
170 Posts
Maiden of 42 BB - NEED HELP

My first flight of my 42 in KF1 BB was interesting but not satisfying. I need a bit of help diagnosing the trimming issues.

With the CG at about .4 cord, the plane was clearly tail heavy. Moving the battery forward to the max allowed in the battery compartment (bottom, behind the landing gear) made it better in that I could get it up in the air. But turning the plane seemed difficult to predict - and the nose still wanted to go up with any increase in throttle This is about .28 of cord.

THe motor is mounted on a plate (not a stick). I believe I factored in the down thrust but maybe not enough.

I can move the battery farther forward but that would seem to make it nose heavy. Of course, if it flies straight I don't really care.

ON the good side, the plane had a lot of lift and at low speed into the wind seemed to float. The plane was not damaged by my attempts to trim it so a bit of this and that and I'm sure it will be airworthy.

I think I have about a half inch throw on both the elevator and rudder.

I am using a 2 cell lipo, a 2410-09Y and an 1147 prop.

Suggestions welcomed.
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Old Nov 04, 2007, 01:50 PM
Went to mow a meadow
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Joined Feb 2007
1,432 Posts
Quote:
Originally Posted by elight50
Maiden of 42 BB - NEED HELP

My first flight of my 42 in KF1 BB was interesting but not satisfying. I need a bit of help diagnosing the trimming issues.

With the CG at about .4 cord, the plane was clearly tail heavy. Moving the battery forward to the max allowed in the battery compartment (bottom, behind the landing gear) made it better in that I could get it up in the air. But turning the plane seemed difficult to predict - and the nose still wanted to go up with any increase in throttle This is about .28 of cord.

THe motor is mounted on a plate (not a stick). I believe I factored in the down thrust but maybe not enough.

I can move the battery farther forward but that would seem to make it nose heavy. Of course, if it flies straight I don't really care.

ON the good side, the plane had a lot of lift and at low speed into the wind seemed to float. The plane was not damaged by my attempts to trim it so a bit of this and that and I'm sure it will be airworthy.

I think I have about a half inch throw on both the elevator and rudder.

I am using a 2 cell lipo, a 2410-09Y and an 1147 prop.

Suggestions welcomed.
Hi

My BB is pretty much the same as yours apart from I use a 3 cell lipo. I fly mine with the CG 3.75inches from the LE (10inch chord) and with about 2 or 3 dgrees downthrust. using the same motor on a 10x5e prop at half throttle it flys straight and level, climbs at full throttle, which is how I like it

Suggest you should maybe move the CG and check the downthrust, you could also check that the wing and tailplane are at the same incidence.
Hope this helps you out.... and good luck!

Just checked the throws, 3/4" on rudder and 1" on elevator
Frank
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Last edited by frank48; Nov 04, 2007 at 04:50 PM.
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Old Nov 04, 2007, 02:05 PM
Registered User
United Kingdom, England, Milton Keynes
Joined May 2007
596 Posts
can i build the 42inch BB with depron?? it is the easiest foam to get for me. can't get any
epp,fff, or blucor in ireland......
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Old Nov 04, 2007, 02:10 PM
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Carmichael, CA
Joined Feb 2007
3,513 Posts
elight50, 1/2" throw probably isn't enough for the rudder. try 3/4" to 1". it also sounds like a bit more downthrust would be in order. iirc, the kf wing should be nose heavy at .28 chord, since it balances closer to midchord. try flying it with some washers behind the mount to increase downthrust. it's a quick & easy experiment to do, & if there's an improvement then you know it's a thrustline error.

i have some experience with epp's indestructibility. my epp planes include a slofly 22, infineon bipe, & scrappy wing. my slofly has taken the worst hits from every conceivable angle & speed. my infineon has taken numerous nose dives into parking blocks & what not, including a few cartwheels on asphalt. my scrappy has suffered from flutter several times at 80MPH+. it has also survived at least 10 nose dives into hard packed dirt during botched launch attempts. none of these epp planes have required repair, and they all still fly like new, so they are all apparently indestructible compared to other foams.

in comparison to other foams, i've damaged 3 different fff & depron planes with lesser impacts. my fff blubaby 33 broke a wing tip hitting a phone line. my fff insulator parkjet has suffered a broken former and bent nose after some relatively light nose dives. my depron slofly 22 only lasted 1month before unplanned meetings with ashphalt & trees got the better of her. fff is quite durable compared to depron, but not even close to epp imo.

the limiting factor when using epp is stiffness. my 87mph wing proves epp can be made stiff enough to go fast when you add cf (the fluttering problem was fixed when i replaced the thin steel control rods with cf). on the other hand making a wing for a bb could be challenging without cf or built up construction.

kev
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Old Nov 04, 2007, 02:11 PM
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Foamenator's Avatar
Northern Nevada
Joined Mar 2007
1,581 Posts
Quote:
Originally Posted by airheli1201
can i build the 42inch BB with depron?? it is the easiest foam to get for me. can't get any
epp,fff, or blucor in ireland......
Absolutely.... Depron will build a fantastic plane. Can you get foam poster board at craft shops or school supply sources. These types of products have 4mm foam like depron laminated between some layers of paper that can be removed. If this type of product is available it is a cheap source of foam that requires a little extra work to clean. In the US two common brands are Elmer's and Rediboard. Hope this helps. Bob
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Old Nov 04, 2007, 02:21 PM
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Carmichael, CA
Joined Feb 2007
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well, if you can only get depron, then go for it. just make sure all the critical areas are reinforced with strapping tape. you won't be able to have as much fun bouncing it off trees practicing new risky aerobatics & whatnot, but it's just a traine anyways, and you'll be ok for most of those harder landings. it'll fly better than most bb's too, since depron planes can be built stiffer & lighter than equivalent fff or epp planes.

kev
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