bem

My Feedback: (1)

Hi FinnSpeed,

Yes that is definitely possible to do in my Galactika - thanks.

I had previously made a list of actions I can perform to make my "fat lady" Galactika lighter:

1) Change to smaller and lighter main wheels. If I go down from 70 mm 29,6 grams for both DuBro Super Lite 2 3/4 in I use today to 63.5 mm (2 1/2 inch) 19.3 grams I will save 10.3 grams.
I checked my inventory and I had a pair of Dubro Super Lite 63.5 mm. I have also a pair of Kato SkyBlue SuperLight 60 mm wheels that weight only 7.9 gram each for total 15.8 gram saving another 3.5 grams if I want.

2) Shorten the cables on flight LiPo battery with total 20 cm (yes that is possible) I will save 9 grams.

3) Shorten battery cables in fuselage to/from current sensor with total 100 mm will save 4 grams.

4) Shorter servo cables on all servos:
- Elevator x 2: 150 mm x 2 = 300 mm will save 5 grams
- Rudder: 150 mm will save 2.5 grams
- Aileron: 75 mm x 2 = 150 mm will save 2.5 grams
- Shorter Quick connect leads 4 x 50 mm = 200 mm will save 3 grams
Total saving: 5+2.5+2.5+3= 13 grams

5) Change to titanium screews for landing gear and Q80 motor.
Landing gear six M4 25 mm steel hex screws I use today weight 2.8 x 6 = 16.8 grams.
If I change to titanium M4 20 mm total weight should be around 7 grams and saving will be close to 10 grams.
The four M4 x 10 steel screws for Q80 weight today 1.5 gram each and total 6 grams, titanium screws should weight about half of that and save 3 grams. (I have already in plane today four M4 x 25 mm countersunk titanium screws mounted to hold the carbon motor mount)
So total savings could be 10+3 = 13 grams.

6) Lightening holes in the battery tray, Today the battrery tray weight 40 grams, I think it should be possible to get it 10 grams lighter that way.

7) RS - Ralph Schweizer Modelltechnik - has titatium prop nuts for Hacker Q80 F3A that weight 4.6 grams. The original steel prop nuts weight 12.4 gram so I can save 7.8 grams on that change.

8) Move Scorpion Backup Guard so no extension servo lead is needed, saving 4.5 grams.

Total savings (rounded down to nearest whole gram to be conservative):
10
9
4
13
13
10
8 (7.8)
4 (4.5)
-------
71 grams
(74 grams if SkyBlue 60 mm wheels selected instead)

That would bring down my Galactika flying weight from todays 5020 grams to 4949 grams (4946 grams if SkyBlue 60 mm wheels instead).

One more option is to change for aileron servos from BLS174SV (53 x 2 = 106 gram / 3.739 oz) to the mini servo BLS173SV (28 x 2 = 56 grams / 1.975 oz) for another 50 grams saving.
And I do not neccessary need to have the 19 grams current sensor (but it is nice to have). With all the above alternatives performed my Galactika would come down under 4900 grams (4877 grams to be precise).

/Bo