RCU Forums - View Single Post - list of planes suitable for 25cc conversion
Old 06-14-2006 | 11:52 AM
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grumpE
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From: omaha, NE
Default RE: list of planes suitable for 25cc conversion

Hey guys,

I have a HEAVILY modified 4*60 with a power problem. It has been bashed into a crop duster look alike with smoke system. I have a mag 91 FS in it running Magnum 1 fuel (approx 20% nitro). I have solid performance but little emergency reserve. The thought of a bigger glow engine is not appealing as it would just need to carry more fuel and negate most fo the gain IMHO. Plus I think I could get better smoke from a gasser. Do not have an all up weight but will look tonight.

Here is how the stock version (mine is easily 2 pounds heavier) compares to the stock 4*120.

4 Star 60
Recommended Engines:
.60-.75 in³ (10.0 - 12.3 cm³) 2-Stroke Glow
.65-.90 in³ (10.7 - 14.8 cm³) 4-Stroke Glow
Wingspan: 71 in (1803 mm)
Wing Area: 920 in² (60.3 dm²)
Wing Area: 6.388 ft²
Weight: 7 - 8 lbs (112-128 oz)
Wing Loading: 17.5 - 20.037oz/sq ft
Length: 57 in (1448 mm)

Estimates of my bird:
Weight: 9 -10 lbs (144 - 160 oz)
Wing Loading: 22.54 - 25oz/sq ft


4 Star 120
Recommended Engines:
0.90-1.20 cu. in. 2-Stroke
1.20-1.60 cu. in. 4-Stroke
Wingspan: 81 in.
Wing Area: 1205 sq. in.
Wing Area: 8.368 sq. ft.
Weight: 10 1/2 - 12lbs.
Wing Loading: 20 - 22.9 oz/sq ft
Length: 65 in.


My bashed 60 flies really well and will glide like a kite when deadsticked (read as run out of glow fuel having fun). I have three 4.8v packs under the tank (one for flight pack, one for smoke and one as dead weight) and the smoke system crammed as far forward as possible and I still needed a Higly heavy prop nut to balance so I have room to loose weight.

I just happen to have a Homie 25 wacker that is seven years old and needs a new cutter head. Easy to convince the Missus we just need a new wacker.

Do you think this is just too far over the top?

Eric