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Archive for the ‘foam’ Category

Feb
04

Old Fogey 2 In Foam

12amp, foam, scratch build Comments Off on Old Fogey 2 In Foam 

Fogey 2 In Foam


Due to the apparent poor performance of my Coroplast Fogey I have built a foam board one to see if it works better :) It Flys :) Fogey and Piper Cub


All finished
AUW 732 Grams 
1000mAh Zippy Compact
Landing gear
All rubber bands ect ready to fly






My custom power pod














2210N 1000Kv Brushless motor 
Weight: 45g
Shaft: 3mm


Spec.GWS9050 @3S
Max Amp: 11.2A
RPM/Min: 8700
Thrust: 740g
APC9x3.8 @2S
Max Amp: 6.5A
RPM/Min: 6260
Thrust: 405g






My Thrust Tests with a GWS 10X4.7 slow fly and a 2200mAh 3 cell
3.7 A      45 Watts     303 Grams
7.3 A      86 Watts     480 Grams
9.5 A      111 Watts    550 Grams
13.1 A    150 Watts    655 Grams


HobbyKing 12A BlueSeries Brushless Speed Controller


Spec.
Cont. Current: 12A
Burst Current: 16A/10sec
Battery: 2-4 Cell Lipo / 5-12 Cell Ni-XX
SBEC: 5V/ 1A Output
Size: 22*21*4mm
Weight: 10g









Spec.
Capacity: 1000mAh
Voltage: 3S1P / 3 Cell / 11.1V
Discharge: 25C Constant / 35C Burst
Weight: 82g
Dimensions: 76x15x34mm
Balance Plug: JST-XH
Discharge Plug: XT60
Jan
29

Baby Fogey 50%

foam, nanotech, scratch build, Turnigy Comments Off on Baby Fogey 50% 

Baby Fogey 50%

Baby Fogey flew on a rare calm day she's a bit to heavy with a 2 cell 500mAh nice wee plane will take her to the indoor flying club another time once I have reduced the mass so its not so fast. Here ars some more 50% Fogey's Indoor Micro Old Fogey



50% Scale of original Flitetest design. EPS foam
AUW Weight 120 Grams

She needs to lose her puppy fat and slim down to 100 Grams
2900kv C10 motor from HK with a 4.1 X 4.1 prop witha  3 cell draws it 5.4 Amps on the test rig for 123 Grams of thrust or 4.4 Oz

The weight can come down with a 3C 180mAh NanoTech 
19 Grams vs 32 Grams for the Zippy above








Dec
25

500mm Foam Polyhedral Bi Plane

2150kv, biplane, christmas, esc, foam, scratch build, servo, xmas Comments Off on 500mm Foam Polyhedral Bi Plane 

My 500 mm Foam Bi Plane Christmas day 2012 Le Bons bay New Zealand
Took the camera off after this flight as its 19 Grams to much for the tiny bi-plane.

Scratch built for Xmas day. It was fun little plane for the day. It was a bit windy for it so without ailerons a few crashes, nothing that couldn't be taped up however until the ESC caught fire :)

Span 550mm with flip ups
Airframe weight 74 Grams Extruded Polystyrene and Bamboo 
Batts 52 Grams 180mAh Nano Tech's
Motor and prop 52 Grams
RX 10 Grams
ESC 9 Grams eith wires and connector Hobbyking SS Series 8-10A
2 X 6 Gram servos
AUW 209 Grams
Wing loading around 11 Oz/ft² assuming you count both wings as wing area for a bi-plane. Some say the effective wing area is 75% of the total giving around 15 Oz/ft²
Rudder and elevator (no ailerons which was s shame) 

Lots of lift from chunky wings, its over powered with a 44 gram AXN-2208-2150 2150kv you could induce a roll with the throttle. The polyhedral flip ups were not big enough I suspect, and it was windy but is flew Ok, the beach is a good place to crash, landed in a tree at one point the big motor kicked her free however. 

Getting some Hextronic 24 Gram 1500kv for these smaller models as recommended by 


Getting into flextures, not enough flextures ind RC models in my opinion. They work well and don't backdrive the servos like metal wire, fine on these tiny planes. 

Note the bamboo push rods, which weigh nothing.

Cooked the ESC by the end of the session as the two 180mAh Nano Tech's ran dry I taped on a 1300mAh, to heavy to many amps.

Might build a little plane like this for indoors with a tiny motor  like a C10 2900kv which is around 8 Grams .

Indoor foamy spec
Yank and bank bi-plane 50 Watts should get around 150 - 200 Grams of thrust so plenty 

Air frame 60 grams 
50 Watt Motor  C10 Micro brushless outrunner 2900kv  and 4.75 x 4.75 prop 12 Grams
Battery Turnigy nano-tech 460mah 2S 25~40C Lipo Pack 33 Grams
ESC wires ect Hobbyking SS Series 8-10A ESC 9 Grams
AUW 134 Grams
















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