Scioly.org

chinesesushi wrote:Look back, I asked this exact question a while ago. It was suggested that the loading block's center should be above the point between the top and bottom.

Thanks

For a tower crane boomilever, should I have the loading block (1.) align with where the tension members are connected to the compression members at the bottom of compression member or (2.) in between the two points where the tension arm connects with the top and bottom compression members? I tried b...

Thanks, Iwonder. I usually apply the glue directly from the bottle. To keep the glue from drying before I reach the other end, I usually pour more glue than needed, so my beams are always heavy. But still sometimes I don't have enough time and I end up throwing away the pieces. So when I used the ap...

Is there a strength difference between medium glue and ultra-thin glue? The boomilever that I built using ultra-thin glue failed at the compression members (the side wall of the box beam just peeled off) early in the testing. I used the glue applicator as instructed in Jander14indoor's post. I appli...

Someone mentioned that their compression members are 3cm apart. How does the loading block stay on the compression members without interfering with the tension members?

nxtscholar wrote:Ahh, tomorrow is my regions.

Any last minute advice on how I should transport the boom to ensure maximum safety, or anything else I should bring?

I would bring some extra wood, glue, I meant level (not balance), a ruler, goggles, and this year's rules. Good luck tomorrow.

That's true for me, too. My retangular base keeps failing and it takes me way too long (2 to 3 hrs) to connect the T, C, and base together. I've decided to buy a 5/8" dowel. I contacted Specialized Balsa and since it's a special order, there'll be a $30 set up charge :o . Are there other place...

It's crunch time in New Jersey. My regions is just 5 days away :( So jma, I built that rectangular compression beam using the 1/32 side panels and 1/20 for my top and bottom; it weighed 10.5 grams, rather heavy considering what you and I were going for. I had an efficiency of 700. Now, the actual c...

jma, are you pretensioning your compression cross-bracings? If that's the case, then when the compression member is unloaded it'll bend. I'm not sure how to go about gluing the tension members onto a compression member like that, perhaps if you could glue the tension members on the compression memb...

fanjiatian wrote:Can you give some more details on pulling the bracings? Does that help the glue connection? I'm having trouble visualizing it

I mean that I might have stretched the bracings too much when I glued them on. I just wanted to make sure the bracings were completely straightened out.