Originally Posted by silversurfr77
Great info on the batteries. Thank you. It took me a while to figure out the voltage situation. These types of comments are great! As I stated this is all new to me, and the language as well.
I was very confused when trying to understand servo/battery voltage compatibility.
So far I have all the components (I think) I need to complete. The radio is on its way. When assembling I had the option of locking the differentials. Can anyone explain the significance in doing so on a crawler?
And lastly......honestly......what's better? Going fast or playing with a crawler?
with the diffs open, power will always go to the wheel with least resistance. So, if your front right tire is off the ground and the left is on the ground, power will go mostly to the right tire.....so your front axle wont be able to pull the truck. If 1 rear tire and 1 front tire are in the air, then the truck will hardly move as all the power will go to the wheels not touching the ground.
Open diffs make turning easier, since the inside and outside wheel can turn at different speeds.
Locked diffs means power ALWAYS goes to both wheels on a axle and they always turn at the same speed. The greatly improves crawling ability as you can have 1 tire in the air and the other tire and that axle will still be working to move the truck.
locked diffs reduce turning ability some, as the front tires will always turn the same speed. the truck will still turn, just not as tightly.
A compromise is to lock the rear, and leave the front open.
there are videos from chevy showing there g80 locking diff in action.... a truck on a hill where one tire is basically off the ground....at first the truck wont move...then when the difference in speed between the 2 tires is high enough, the locking diff locks and power now goes to the tire that is on the ground and the truck gets moving again.
basically, with open diffs a 4wd truck can still get stuck as it can become 2wd (1 tire on front and 1 tire on rear in the air, or with no traction spinning and the other 2 tires not getting power)
A 4wd with locked axles sends power to all 4 tires all of the time and they all rotate at the same speed.
locked for lots of rock crawling. locked rear, open front for trail driving or more challenging mild rock crawling. Open diffs if you want to drive it around like a monster truck that can still go threw some mud or sand or other loose surfaces.
I enjoy rock crawling and driving fast the same. rock crawling is more technical....where you place the tires, picking the right line and such. Throttle control is important as well, to much or too little can result in either the truck not moving, or the truck possible breaking something.
Driving fast can be a handful that can require fast reflexes. And jumping an rc is always fun.
some people give rock crawling a try and don't like it. Often, picking the right place to crawl is important. the right mix of rocks, loose surface, maybe some water or mud will make driving your crawler more fun. Drive where the rocks are too small or way to large and it can be to hard or to easy to drive. Some also try to drive crawlers as fast as they can....this will lead to lots of broken driveline parts. A tire can become jammed between rocks sometimes, punch the throttle hard and stuff can snap. It is more about control and watching all 4 tires and overcoming that obstacle that was a challenge.
Another aspect of crawling that is a huge draw is building your truck to look like a real truck. most fast RC's only somewhat resemble a real vehicle. But some rock crawlers are built with amazing bodies and amazing scale details.