Hybrid Fidget

[BTCat]

Well, I used my little paper plane I was joking about as a mock up for a possible small build. There is a plan on RCGroups for a Fidget with an 18 inch wingspan. It calls for a KF style airfoil. That is actually what caught my attention. KF is a style used for a lot of the foamie flying wing scratch builds. A very simple design that can produce very good results.

Ironically, I decided to modify this first one and use a Clark-Y airfoil instead. If this thing works, I may build it with 3mm EPP. Right now I am using Dollar Tree foam poster board and another poster board more similar to Elmer's. I figured this would be good to try it out before ordering up the EPP. Problem is, it may bust all to hell on first flight, too

I modified the wing dimensions a little and had fun playing around with the Clark design. I don't have my motor picked out yet and I still need to buy some small servos (or borrow from my HBFP ;D). I did do a glide test and it does glide nicely considering I was doing it between wind gusts.

Here is a video I made with a $14.00 Keychain cam I got off of ebay. When I get this thing in the air, the keychain cam will probably be strapped to it somewhere.

[19000rpm]

Mar 20, 2010 21:19:00 GMT -6 BTCat said:

Well, I used my little paper plane I was joking about as a mock up for a possible small build. There is a plan on RCGroups for a Fidget with an 18 inch wingspan. It calls for a KF style airfoil. That is actually what caught my attention. KF is a style used for a lot of the foamie flying wing scratch builds. A very simple design that can produce very good results.

Ironically, I decided to modify this first one and use a Clark-Y airfoil instead. If this thing works, I may build it with 3mm EPP. Right now I am using Dollar Tree foam poster board and another poster board more similar to Elmer's. I figured this would be good to try it out before ordering up the EPP. Problem is, it may bust all to hell on first flight, too

I modified the wing dimensions a little and had fun playing around with the Clark design. I don't have my motor picked out yet and I still need to buy some small servos (or borrow from my HBFP ;D). I did do a glide test and it does glide nicely considering I was doing it between wind gusts.

Here is a video I made with a $14.00 Keychain cam I got off of ebay. When I get this thing in the air, the keychain cam will probably be strapped to it somewhere.

You've been a busy guy.

I like that little plane. I got a motor that I think would be great. A 7.4 set up. HDX2730-1500. 6-10A ESC. 500 mAh battery. Some 3-4 gram servos.

The wing looks great. The ailerons are the perfect size. I might suggest moving the horns closer to center to keep the force and deflection more even.

[akent]

Nice, BT!
You are getting into these foamies! Cool!

Yep, I agree with 19k! That would be a cheap/nice power setup for that plane! And if you ever wanted more power, just toss in a 3s battery! These draw right at 10 amps on 3s with an 8x4 GWS prop. 2s should be less. Turnigy also makes the 2730 in 1300kv and 1500kv, just like HXT.
I'm running 1300kv on everything now except the first F-22 where I'm running 1500kv.
I am running the Turnigy 18a ESC, though, as they are barely larger than the 10-12amp and I like a little margin.

Maybe some of the HXT-500 servos. These are very small and light. And somewhere around $3.50 each. I bought a few of these and they are great.

That thing has huge control surfaces, so should be a great 3d flyer.
Kent

[BTCat]

Thanks guys. I'm still trying to figure out what I want to do about the motor. AUW of the original was about 99g. His was 3mm EPP. Mine may be heavier due to the tape and the wing structure. His motor dimensions are quite small. I haven't cut out for the motor or the lipo and I won't until I have everything in hand. I can mount the Lipo anywhere on bottom of the fuse to keep within the wing core and low. The plan's original setup is below.

19k, I'm using a single servo for the ailerons. I still have some flexable linkage and tubing so I believe I should be able to center the mount like you suggested. If you don't need the setup you mentioned, name a price and I'll take it. If you are going to use it, don't worry about it. I can wait on China. Usually only takes 14 days to my door.

Kent, I'm not sure about the aileron size. I left them as per the plan which gives me plenty of stock to trim if needed. I'm wondering if the aileron will interfer with lift since it covers so much area behind the trailing edge of the Clark-Y.



Wing skin 3mm EPP 8.2
KF step 3mm EPP 0.3
KF skin 3mm EPP 3.0
Fusalage 3mm EPP 2.8
Hinge tape & glue 7.0
Firewall 3mm Liteply 0.7
Firewall butress 8mm EPP 0.1
pushrods, horns etc 5
Rx Hitec HFS-05MS 8
Servos 3X3.7gm Torque 0.40Kg.cm 11.1
LiPo hexTronik 460mAh 2S1P 15C 29
Motor 18-11 2000kv Micro Brushless 10.0 www.hobbycity.com/hobbycity/store/uh_viewItem.asp?idProduct=5358
Esc H-Wing Pentium 10amp 9.0
Prop GWS 7x3.5 4.0
Total weight 99 gm

[19000rpm]

Mar 21, 2010 15:05:20 GMT -6 BTCat said:

Thanks guys. I'm still trying to figure out what I want to do about the motor. AUW of the original was about 99g. His was 3mm EPP. Mine may be heavier due to the tape and the wing structure. His motor dimensions are quite small. I haven't cut out for the motor or the lipo and I won't until I have everything in hand. I can mount the Lipo anywhere on bottom of the fuse to keep within the wing core and low. The plan's original setup is below.

19k, I'm using a single servo for the ailerons. I still have some flexable linkage and tubing so I believe I should be able to center the mount like you suggested. If you don't need the setup you mentioned, name a price and I'll take it. If you are going to use it, don't worry about it. I can wait on China. Usually only takes 14 days to my door.

Kent, I'm not sure about the aileron size. I left them as per the plan which gives me plenty of stock to trim if needed. I'm wondering if the aileron will interfer with lift since it covers so much area behind the trailing edge of the Clark-Y.



Wing skin 3mm EPP 8.2
KF step 3mm EPP 0.3
KF skin 3mm EPP 3.0
Fusalage 3mm EPP 2.8
Hinge tape & glue 7.0
Firewall 3mm Liteply 0.7
Firewall butress 8mm EPP 0.1
pushrods, horns etc 5
Rx Hitec HFS-05MS 8
Servos 3X3.7gm Torque 0.40Kg.cm 11.1
LiPo hexTronik 460mAh 2S1P 15C 29
Motor 18-11 2000kv Micro Brushless 10.0 www.hobbycity.com/hobbycity/store/uh_viewItem.asp?idProduct=5358
Esc H-Wing Pentium 10amp 9.0
Prop GWS 7x3.5 4.0
Total weight 99 gm

Well, I'm going to be using those components. If I weren't such a selfish person I'd send them to you...What can I say.

[BTCat]

Mar 21, 2010 16:11:45 GMT -6 19000rpm said:

Mar 21, 2010 15:05:20 GMT -6 BTCat said:

Thanks guys. I'm still trying to figure out what I want to do about the motor. AUW of the original was about 99g. His was 3mm EPP. Mine may be heavier due to the tape and the wing structure. His motor dimensions are quite small. I haven't cut out for the motor or the lipo and I won't until I have everything in hand. I can mount the Lipo anywhere on bottom of the fuse to keep within the wing core and low. The plan's original setup is below.

19k, I'm using a single servo for the ailerons. I still have some flexable linkage and tubing so I believe I should be able to center the mount like you suggested. If you don't need the setup you mentioned, name a price and I'll take it. If you are going to use it, don't worry about it. I can wait on China. Usually only takes 14 days to my door.

Kent, I'm not sure about the aileron size. I left them as per the plan which gives me plenty of stock to trim if needed. I'm wondering if the aileron will interfer with lift since it covers so much area behind the trailing edge of the Clark-Y.



Wing skin 3mm EPP 8.2
KF step 3mm EPP 0.3
KF skin 3mm EPP 3.0
Fusalage 3mm EPP 2.8
Hinge tape & glue 7.0
Firewall 3mm Liteply 0.7
Firewall butress 8mm EPP 0.1
pushrods, horns etc 5
Rx Hitec HFS-05MS 8
Servos 3X3.7gm Torque 0.40Kg.cm 11.1
LiPo hexTronik 460mAh 2S1P 15C 29
Motor 18-11 2000kv Micro Brushless 10.0 www.hobbycity.com/hobbycity/store/uh_viewItem.asp?idProduct=5358
Esc H-Wing Pentium 10amp 9.0
Prop GWS 7x3.5 4.0
Total weight 99 gm

Well, I'm going to be using those components. If I weren't such a selfish person I'd send them to you...What can I say.

;D Still looking at motors....I need to push the button tonight, though.

[BTCat]

Guys, I am having a tough time finding anything that looks right for this little guy. It calls for a 10g motor www.hobbycity.com/hobbycity/store/uh_viewItem.asp?idProduct=5358 with @ ~30w and 140 g static thrust. I need to keep mine pretty vanilla for now (probably 7.4v to begin with) but mine will be a little heavier than the AUW of the plan.

EVERYTHING I seem to like is out of stock at Hobbycity. I'm not in a terrible hurry, but I would at least like to have a plan. Do you think the motor 19k is using fits the bill? Dimensionally, it is about 10mm wider than I need, but I can get around that. Not sure about the weight, though.

I'm also looking at the Turnigy 1811 series. They come in 1500, 1800 and 2000kv. If you look right above the little dimensions diagram, they have a link to a "Turnigy Motor Data" zip file will a lot of good info:

www.hobbycity.com/hobbycity/store/uh_viewItem.asp?idProduct=8476

All opinions welcome, some opinions considered, one opinion followed (but no promises. I'm a stubborn Texan )

[Solitaire]

Is this one too small?
What's the desired AUW of the Fidget?

www.hobbycity.com/hobbycity/store/uh_viewItem.asp?idProduct=6312&Product_Name=hexTronik_5gram_Brushless_Outrunner_2000kv

[BTCat]

I looked at that one also. The AUW per the original plan was 99 grams (3.5 oz). I would suspect, depending on the motor, I will end up between 99 and 115 grams (4.0 oz). Not sure.

The thrust reported in the comments is up to around 80. Not sure how it would perform

[19000rpm]

Mar 24, 2010 5:05:35 GMT -6 BTCat said:

I looked at that one also. The AUW per the original plan was 99 grams (3.5 oz). I would suspect, depending on the motor, I will end up between 99 and 115 grams (4.0 oz). Not sure.

The thrust reported in the comments is up to around 80. Not sure how it would perform

The 2730 1500 runs 26grams not counting connectors.

Here's a really light motor, 7g. A little high on the kV. www.hobbycity.com/hobbycity/store/uh_viewItem.asp?idProduct=8294

[BTCat]

Mar 24, 2010 5:49:39 GMT -6 19000rpm said:

Mar 24, 2010 5:05:35 GMT -6 BTCat said:

I looked at that one also. The AUW per the original plan was 99 grams (3.5 oz). I would suspect, depending on the motor, I will end up between 99 and 115 grams (4.0 oz). Not sure.

The thrust reported in the comments is up to around 80. Not sure how it would perform

The 2730 1500 runs 26grams not counting connectors.

Here's a really light motor, 7g. A little high on the kV. www.hobbycity.com/hobbycity/store/uh_viewItem.asp?idProduct=8294

I wonder why I haven't seen this one before? I'll think on it and see. It may fit the bill if it has the thrust. If I am reading the third comment correctly (can't tell what language that is, but it isn't Texmex) He is saying he gets about 150 grams thrust with 2 cells. That sounds about like what I would need.

[Solitaire]

Yeah, that last one seems like it may do the trick. And only 7g, you might be able to get close to the suggested 99g AUW

[akent]

I've never tried to build a super light machine. That should be fun, BT.

I build a plane, then just stick 2-4x the power it needs on it!

But I know weight affects 3d machines. My Yak flies better with a 500ma battery as opposed to a 1000ma battery, but it will still hover at half throttle!

That little guy is going to be fun! 99 grams is super light!

Here are some weights of my foamies, all without batteries:
Delta Dart: 170 grams
F-22: 251 grams
Yak-55: 255 grams
Stryker: 446 grams
L-39: 438 grams

Of all the above, the Delta Dart is the most 'lively'. I am running the HXT2730-1300 on it with an 8x4 prop now. It hovers at about 1/3 throttle and zooms at full throttle. I posted a video of this thing earlier. It's a handful, but it is a blast to fly!

Kent

[akent]

If you want a relatively huge setup, I have extras for:
Turnigy 2730-1300 (comes with prop saver, motor mount and ESC connectors)
Turnigy 18a esc
HXT-500 (tiny) or HXT-900 (9 gram) servos

I'd sell em to you at HC cost, plus UPS. UPS ground is overnight to Dallas from here.
I'm on my last 8x4 GWS prop, but I have one dinged one that I could throw in there. I also have a new 9x5 and some 7x??. I would need to look at those for the pitch.

You could have it all probably by this weekend.

Note that if you use two aileron servos, then you can set them up as spoilerons or flaperons. I have done both on my Yak, and spoilerons really help with the stability of high alpha. Flaperons just make it fly super slow, which doesn't really matter as it flies super slow anyway. I think it was Gabe who talked about doing spoilerons. They are a hoot when you flip it on! The Yak just pretty much stops and points it's nose up! I have those tied to the idle up switch.
Kent

[BTCat]

Got a load of stuff going on tonight. I'm thinking of cutting out a bigger fidget. If so, that suff might fit the bill. I'll take a look in the morning