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Cub Scout space derby tips?
Hey gang,
My son has finished his space Derby ship. Got any tips other than balance, and straight fins? I have some questions... 1. The prop is pulled against the hub by the rubber band. Im suprised it isnt setup to freewheel when the rubber band runs out. Normal? Should i graphite it? 2. Two bands or three? 3. Smaller or bigger fins? 4. What do I use for rubber band lubricant? Thanks?
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Chris ---------------------------------------------- 1996 993 RS Replica 2023 KTM 890 Adventure R 1971 Norton 750 Commando Alcon Brake Kits |
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03-18-2013, 07:45 PM
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78 in a '71
Join Date: Aug 2006
Location: WA on the Wet Side
Posts: 4,048
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Quote:
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On glide path...... 1971 911 T Targa 2013 Ford Fusion Titanium AWD 1982 Volvo 245, 1996 Ford F-150 |
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03-18-2013, 08:22 PM
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Super Moderator
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Quote:
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Chris ---------------------------------------------- 1996 993 RS Replica 2023 KTM 890 Adventure R 1971 Norton 750 Commando Alcon Brake Kits |
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03-18-2013, 08:29 PM
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78 in a '71
Join Date: Aug 2006
Location: WA on the Wet Side
Posts: 4,048
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Yes to graphite, don't know about the fins.
__________________
On glide path...... 1971 911 T Targa 2013 Ford Fusion Titanium AWD 1982 Volvo 245, 1996 Ford F-150 |
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03-18-2013, 08:31 PM
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78 in a '71
Join Date: Aug 2006
Location: WA on the Wet Side
Posts: 4,048
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Glycerin for rubber band lubricant.
__________________
On glide path...... 1971 911 T Targa 2013 Ford Fusion Titanium AWD 1982 Volvo 245, 1996 Ford F-150 |
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03-18-2013, 08:32 PM
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Thanks. Mom didnt even blanch when i had him do the rough shaping with her potato peeler lol.
Glycerine? As in the stuff in packets from the grocery store?
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Chris ---------------------------------------------- 1996 993 RS Replica 2023 KTM 890 Adventure R 1971 Norton 750 Commando Alcon Brake Kits |
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03-18-2013, 08:33 PM
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78 in a '71
Join Date: Aug 2006
Location: WA on the Wet Side
Posts: 4,048
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Yes. That is the stuff we used in the 40's and 50's for both indoor and outdoor rubber band flight. I think we were using pure gum rubber bands. Today's rubber is probably different. I would test twist the rubber-glycerin a few times out of the model.
Chris, as far as the "lecture", I'm a Geezer. That's what I do.
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On glide path...... 1971 911 T Targa 2013 Ford Fusion Titanium AWD 1982 Volvo 245, 1996 Ford F-150 |
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03-18-2013, 09:24 PM
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78 in a '71
Join Date: Aug 2006
Location: WA on the Wet Side
Posts: 4,048
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__________________
On glide path...... 1971 911 T Targa 2013 Ford Fusion Titanium AWD 1982 Volvo 245, 1996 Ford F-150 |
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03-18-2013, 09:33 PM
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Registered
Join Date: Jun 2007
Location: Lake Oswego, OR
Posts: 6,050
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Big fins. We did this a few years ago and it really didn't work for anyone. Lot of friction on the string. Often times too much power resulted in twisting reaction on the racer. I am very competitive on PWD. On the Space Derby? It seemed very randomized. I don't know if we had more than about two racers even get to the finish line. This is with a Pack that is extrememly competitive for PWD.
Don't know if that helps. It was fun, however. Larry |
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03-19-2013, 06:04 AM
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1970 Porsche 911 S 
