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R/C airplane weight Question

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Happy and when was this picture taken?

Post  happydad on Tue Sep 08, 2015 2:53 pm

Surfer_kris wrote:I think the plane will fly just fine, that's what they used to weight in the 80-ties and they flew just fine. You won't need any throttle though...

The spring held batteries are dangerous though, as the batteries can shift and disconnect. You'll be much better off with a soldered battery pack from e.g. Radical RC (RX battery packs)

Here is the plane I learnt to fly on, used a two-channel standard radio and a BabeBee engine, 26" wingspan and about 20oz ;


Surfer_Kris: And when was this picture taken? Back in 1411 when you Swedes came over and conquered America? lol! This Site Rocks!  Just Keeding.  Looks like you were about 14 or 15 and we will drop the subject there.
   Times change, technology changes as well. Some of the new radio systems can withstand 2S LiPo batteries, even up to 9 volt, but you have to check the specs on the receiver AND the servos. On the electrics I use an ESC, Electronic Speed Control, and it usually has a built in BEC, Battery Eliminator Circuit, which can put out a steady 5 volts to the receiver and servos up to 1 amp. or even up to 3 amp. PEAK even. That is why you have to read the specs for both the receiver and servos. Servos usually have 2 ratings for current, steady state and peak. The first is when the servo is on and doing nothing and the second is when the servo is doing maximum work. This leads to the battery rating. How long do you want to fly. Add up the receiver amps. and the peak servos amps., (or mAmps.), X some number that is an average for useage like 20% maybe. that is the total current needed, i.e. 60mAmp. for RX + (100 mAmp. X .25 = 25 mAmp.) = 85 mAmp. and divide into your battery pack like 250 mAmphr., (250 / 85 = 2.9), and you theoretically could get 2.9 hours flight time with this ficticious servo - receiver - battery combination. In reality I think the servo peak mAmp. numbers are much higher. I don't have any servo specs in front of me. Personally I use a 225 mAmpHr battery and fly for 15 minutes at a time and if i see any glitches I immediately land and switch the battery. p.s. I usually check the battery voltage after each flight.
my 2cents Two Cents

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Happy Re: R/C airplane weight Question

Post  getback on Tue Sep 08, 2015 4:25 pm

OK guys I am on board with the batt. But my charger charges RX 4.8 VDC  50mA Only NI-cd  4.8/500mha   And my Opening is 1.1/4" sq. to put the battery up front . CG 3" off LE no battery.  Which batt. can I use ? The Batt. I took out was 111Gm. 2"x2.1/4" I am thinking the 720 what is NiMH. http://www.radicalrc.com/category/Receiver-NiMH-Packs-19  As you can tell I know nothing about interchanging stuff I always use what comes with the system. Eric thanks you RC Plane


Last edited by getback on Tue Sep 08, 2015 5:00 pm; edited 2 times in total (Reason for editing : wrong size on battery sorry gosh i think i got it right this time)
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Happy Isn't the NiCd battery less than 1.5 inch SQ.?

Post  happydad on Tue Sep 08, 2015 4:51 pm

getback wrote:OK guys I am on board with the batt. But my charger charges RX 4.8 VDC  50mA Only NI-cd  4.8/500mha   And my Opening is 1.5" sq. to put the battery up front . CG 3" off LE no battery.  Which batt. can I use ? The Batt. I took out was 111Gm. I am thinking the 720 what is NiMH. http://www.radicalrc.com/category/Receiver-NiMH-Packs-19  As you can tell I know nothing about interchanging stuff I always use what comes with the system. Eric thanks you RC Plane

Isn't the NiCd battery less than 1.5 inch Sq. ?  My AA batteries are NiMH and they are about 1.25inch sq. x 2 inch long. If you insert the NiCd battery into the 1.5 inch Sq. hole it should slide fore and aft? Try it first and slide fore and aft to adjust for CG. Maybe you have padding around the battery pack and it is larger than 1.5 inch sq. I use very thin foam padding wrapped 2x around the battery pack and it is still less than 1.5 in. sq. Maybe take the padding off and try the bare batteries to see where the CG is. That may solve the problem. Maybe the CG is forward of a bulkhead and there is no problem. my 2cents. Two Cents

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Happy Re: R/C airplane weight Question

Post  getback on Tue Sep 08, 2015 4:56 pm

stupid me put the wrong size for the hole is 1.1/4" Sorry I fixed it in the post , I am working on the Zero at the same time ,,, go get some AIR!! OK Eric Very Happy
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Happy how big is the battery pack

Post  happydad on Tue Sep 08, 2015 5:17 pm

getback wrote:stupid me put the wrong size for the hole is 1.1/4" Sorry I fixed it in the post , I am working on the Zero at the same time ,,, go get some AIR!! OK Eric Very Happy

o.k. all is forgiven. reset.

how big is the battery pack with and without any foam insulation?

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Happy Re: R/C airplane weight Question

Post  getback on Tue Sep 08, 2015 5:46 pm

The Batt. I took out was 111Gm. 2"x2.1/4" no pad just batt. I am more concerned about the charging though, there are ones that will fit with less run time 260mha , Did you look at the link where the batteries are ? Thanks Eric
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Happy Re: R/C airplane weight Question

Post  roddie on Tue Sep 08, 2015 6:51 pm

I haven't done business with these people, but..

4.8V AAA NiMH square pack

Check out the dimensions/specs.

(Edit) That pack is less than 1/2 the weight of the one you have.. and twice the capacity. At just over 3/4" square.. it will fit in your opening. The AA square-pack would too.. (@1.1" sq.) There's a good chance you could use the charger you have.. but I'm not sure about that. I believe that most NiCd chargers will charge NiMH packs of the same voltage/capacity, without any trouble.
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Happy You can get it cheaper

Post  happydad on Wed Sep 09, 2015 7:18 am

roddie wrote:I haven't done business with these people, but..

4.8V AAA NiMH square pack

Check out the dimensions/specs.

(Edit) That pack is less than 1/2 the weight of the one you have.. and twice the capacity. At just over 3/4" square.. it will fit in your opening. The AA square-pack would too.. (@1.1" sq.) There's a good chance you could use the charger you have.. but I'm not sure about that. I believe that most NiCd chargers will charge NiMH packs of the same voltage/capacity, without any trouble.

I used to get AA and AAA NiMh batteries, only, on eBay for less than $1.00 each. I typically used the 2/3 AAA battery at  400mahr  700 mAhr and around $4.00 for a pack of 4. Sometimes with a JT, I think, connector. It is red and 2 wire about .15 inch spaced. Maybe called the JST connector. I made them and sold on eBay for a while. They also make AA in 1/2 and 2/3 sizes with appropriate mAhr ratings. I don't have the mAhr ratings handy. Search NiMh rechargcable AA 1/2 or 2/3 or what ever size you need.

edited 9:24a.m. PST 9-9-15 - to correct mAhr rating and add a picture.

here is a picture of the 2/3AAA 700mAhr batteries I use for my small, 30 inch wingspan, planes. 2.25 inch long X 1.250 inch high X 0.50 inch thick in the 1X4 configuration and the battery pack came as shown without a connector. In the 2X2 config. it would be 1.125 sq. X 1.125 inch.

as purchased except it didn't have this connector.

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Last edited by happydad on Wed Sep 09, 2015 11:35 am; edited 1 time in total (Reason for editing : to add information)
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Happy sub C cells

Post  happydad on Wed Sep 09, 2015 11:41 am

getback wrote:The Batt. I took out was 111Gm. 2"x2.1/4"  no pad just batt. I am more concerned about the charging though, there are ones that will fit with less run time 260mha , Did you look at the link where the batteries are ? Thanks Eric

the battery pack must have been a sub C battery pack. Each cell is usually 1 X 1 inch.
Maybe the pack was C cells, they are longer and larger in diameter. maybe 1 x 2 inch.

The new NiMh are probably 4X what they were in the 1980's.

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Happy Re: R/C airplane weight Question

Post  getback on Wed Sep 09, 2015 11:52 am

I am looking at this one with jr conn. , but I have another smaller plane and need to ck. if I need to get sq. or flat pack.  http://www.ebay.com/itm/FLOUREON-4-Cell-AAA-Ni-MH-4-8V-1000mAh-RC-Buggy-Battery-Pack-w-JR-Plug-Connector/231210774411?_trksid=p2046732.c100040.m2060&_trkparms=aid%3D111001%26algo%3DREC.SEED%26ao%3D1%26asc%3D20140107095009%26meid%3Dc0ea5f3a0ad6442b83786df1fd231c0d%26pid%3D100040%26rk%3D2%26rkt%3D4%26sd%3D261462333373 I will get to it soon other crap to do now Mad Eric New ins. and papers to fill out Mad
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Happy can't you add your own connector?

Post  happydad on Wed Sep 09, 2015 12:13 pm

getback wrote:I am looking at this one with jr conn. , but I have another smaller plane and need to ck. if I need to get sq. or flat pack.  http://www.ebay.com/itm/FLOUREON-4-Cell-AAA-Ni-MH-4-8V-1000mAh-RC-Buggy-Battery-Pack-w-JR-Plug-Connector/231210774411?_trksid=p2046732.c100040.m2060&_trkparms=aid%3D111001%26algo%3DREC.SEED%26ao%3D1%26asc%3D20140107095009%26meid%3Dc0ea5f3a0ad6442b83786df1fd231c0d%26pid%3D100040%26rk%3D2%26rkt%3D4%26sd%3D261462333373  I will get to it soon other crap to do now Mad  Eric New ins. and papers to fill out Mad  

can't you add your own connector? It's easy and fun. Of course I have had an entire career doing little stuff like this.
   If you need any help please feel free to PM me. Obviously I would have to get the particular connector you need, JR, but I do have several types like JST and Futaba which is common to most radios today.

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Happy Re: R/C airplane weight Question

Post  getback on Wed Sep 09, 2015 12:36 pm

Yes I could but the price isn't that much diff. even individually battery's then I don't have shrink wrap that big . Thanks for the offer though.. Here's the other plane from a swap meet  36" w/s 23" fuse heck there's plenty of room in there it has micro servos (came with it)        Don't know the name ,,, think the flat pack will be better for weight distribution . Eric Very Happy
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Happy Re: R/C airplane weight Question

Post  batjac on Wed Sep 09, 2015 12:44 pm

Mark Boesen wrote:I think you'd be fine, back in the early 80's i had powered this plane with a golden bee, two full size servos and a 500 mah battery, barely keep airborne, added a Tee Dee and it flew great! Later swapped out battery for 250 mah battery, even better.


That was my very first RC airplane. Got it and a two channel Futaba radio from America's Hobby Center back 'in78. I'll build a couple more someday.

The Nostalgic Mark
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Happy Re: R/C airplane weight Question

Post  batjac on Wed Sep 09, 2015 1:06 pm

getback wrote:Here's the other plane from a swap meet  36" w/s 23" fuse heck there's plenty of room in there it has micro servos (came with it)        Don't know the name ,,, think the flat pack will be better for weight distribution . Eric Very Happy

Yup.  Another one of my favorites, the Bee-Tween.




I have just too many planes I want to build.  They'd better find that way to rejuvenate us all pretty quick...

The Old and Decrepit Mark


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Happy Re: R/C airplane weight Question

Post  getback on Wed Sep 09, 2015 1:42 pm

Damn it man , Thanks Mark I will put that name with the plane /// swap meets already built 20- install radio and GO FLY !! I don't know if the servos are good and don't have any micros of my own right now but this looks like it would be a fun plane for an old fart to get out and just have some FUN ! My neighbor cross the street has a nice big field out back that will bee were I will fly these babys , I love a two channel or three for some easy no worry flying . Eric RC Plane
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Happy Re: R/C airplane weight Question

Post  roddie on Wed Sep 09, 2015 9:01 pm

getback wrote:Damn it man , Thanks Mark I will put that name with the plane /// swap meets already built 20- install radio and GO FLY !! I don't know if the servos are good and don't have any micros of my own right now but this looks like it would be a fun plane for an old fart to get out and just have some FUN ! My neighbor cross the street has a nice big field out back that will bee were I will fly these babys , I love a two channel or three for some easy no worry flying . Eric RC Plane  

I'd love to see Mark's plans library! He probably has most; if not all of my small-model (1/2A) plans/plan-images.. I'm sure. Most were CEF inspired.. but most are control-line. I've bought RC equipment over the years.. that I've never used Eric. The first was a used Futaba "Conquest" 4ch. AM aircraft set w/4 FP-S33 micro-servos in 1993.. for $25.00... The servos alone are still worth that. Fast-forward.. A Futaba "SKYSPORT" T4YF FM system.. right around the time that spread-spectrum was making the scene. Since then.. I invested in a Tactic "Any-Link" 2.4GHz (spread-spectrum) converter and matching RX (6ch.) It utilizes your radio's square-style trainer jack, if so equipped. Cables for Futaba, Spectrum and JR were included with mine.. and others are available. This frequency upgrade is safer than straight FM.. from an interference standpoint. I'd call it a good 1/2A system.. being that the range is 1000ft. The system was less than $100.00.. actually it cost $70.00 including the 200mAh LiFe rx pack that I bought. (all from Tower in 2012)




Here's an example of a lightweight reedy-powered RC flight-pack.. (the nano-servos are Great-Planes/ElectriFly ES-50's)  



With engine.. only 21gr more than that flat AA-pack you have. Oh.. and check out the antenna on the receiver.. nice; not to have to route-it/mount-it.. worry about it.. being severed in a mishap.. and looks nicer for photo-ops. too.
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Happy Tactic AnyLink system

Post  happydad on Wed Sep 09, 2015 9:17 pm

[/quote]

I'd love to see Mark's plans library! He probably has most; if not all of my small-model (1/2A) plans/plan-images.. I'm sure. Most were CEF inspired.. but most are control-line. I've bought RC equipment over the years.. that I've never used Eric. The first was a used Futaba "Conquest" 4ch. AM aircraft set w/4 FP-S33 micro-servos in 1993.. for $25.00... The servos alone are still worth that. Fast-forward.. A Futaba "SKYSPORT" T4YF FM system.. right around the time that spread-spectrum was making the scene. Since then.. I invested in a Tactic "Any-Link" 2.4GHz (spread-spectrum) converter and matching RX (6ch.) It utilizes your radio's square-style trainer jack, if so equipped. Cables for Futaba, Spectrum and JR were included with mine.. and others are available. This frequency upgrade is safer than straight FM.. from an interference standpoint. I'd call it a good 1/2A system.. being that the range is 1000ft. The system was less than $100.00.. actually it cost $70.00 including the 200mAh LiFe rx pack that I bought. (all from Tower in 2012)


Here's an example of a lightweight reedy-powered RC flight-pack.. (the nano-servos are Great-Planes/ElectriFly ES-50's)  



With engine.. only 21gr more than that flat AA-pack you have. [/quote]

So how do you like the Tactic AnyLink radio system? I have 2 of the transmitters, but no receivers. They cost $20.00 each plus shipping and that's a bit too much on my limited budget. The equivalent OrangeRX receiver is less than $10.00 when on sale and the lemonRX receiver was only $5.50 each shipped when you bought 5 pieces.
   I would like to try the AnyLink on my old Futaba FT-7UAF transmitter that has adjustments for almost everything like the newer 2.4GHz systems do now.

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Happy Re: R/C airplane weight Question

Post  roddie on Wed Sep 09, 2015 9:39 pm

[/quote]

So how do you like the Tactic AnyLink radio system? I have 2 of the transmitters, but no receivers. They cost $20.00 each plus shipping and that's a bit too much on my limited budget. The equivalent OrangeRX receiver is less than $10.00 when on sale and the lemonRX receiver was only $5.50 each shipped when you bought 5 pieces.
   I would like to try the AnyLink on my old Futaba FT-7UAF transmitter that has adjustments for almost everything like the newer 2.4GHz systems do now.

happydad  RC Plane[/quote]

Just trying to show Eric what's out there for options. That "Bee-Tween" could be a test-bed. I'll bet once he gets the Honker in the air.. he might want to give the other old girl a whirl! (don't take that the wrong way Laughing )
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Happy Re: R/C airplane weight Question

Post  getback on Thu Sep 10, 2015 8:29 am

Roddie I know about the limited $$ I was looking at the anylink 2 and according to there chart   http://www.tacticrc.com/anylink/anylink2-chart.html they want work on my OLD radios , I think the youngest one I have is 1991 conquest FP-T4NBF and a Attack FP-T6NFK . Heck I have some older than that upstairs SOOO it is what it IS for now , I do have a super cub mini park flyer a friend gave me , I need to do some work to it after him and his kids done a number on It it has a tactic radio but I don't know the range I am thinking 900' or less I will look it up when time comes . One of these days things will bee better and I can infest in a more up to date system,,, wish you would build you a plane put that system in it and go fly have some FUN I know it seems mission impossible but its not . Eric sunny  
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Happy Tactic

Post  happydad on Thu Sep 10, 2015 4:14 pm

getback wrote:Roddie I know about the limited $$ I was looking at the anylink 2 and according to there chart   http://www.tacticrc.com/anylink/anylink2-chart.html they want work on my OLD radios , I think the youngest one I have is 1991 conquest FP-T4NBF and a Attack FP-T6NFK . Heck I have some older than that upstairs SOOO it is what it IS for now , I do have a super cub mini park flyer a friend gave me , I need to do some work to it after him and his kids done a number on It it has a tactic radio but I don't know the range I am thinking 900' or less I will look it up when time comes . One of these days things will bee better and I can infest in a more up to date system,,, wish you would build you a plane put that system in it and go fly have some FUN I know it seems mission impossible but its not . Eric sunny  

I think the requirement for the Tactic AnyLink to work wit any transmitter is the transmitter must be able to put out a PCM signal. Not positive. That is why I am looking to borrow a tactic receiver to use to test the AnyLink with my Futaba TX which can put out an FM or PCM signal to the AnyLink.
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