From previous forum threads on here I had understood that current thinking about bullet connectors was that they are a generally bad idea. The first response to "I had a strange flip" would be along the lines of "Have you soldered your wires and removed those bullet connectors".
I recommended a manual change to reflect this, but had a comment today from Jason saying
"I think you should use bullets. Just get some decent ones."
So I'm confused.What's the party line on this?
If they are high quality (gold plated, etc) and designed to take the current I don't think there is an issue using them. The power connectors to the Lipo are connectors as well in the end and are not soldered. They take 4 times the current.
In fact, they saved me tons of money already by my motor holds coming off clean on small crashes instead of the motors wrecking collateral damage to the ESCs and the rest of the frame. (I use a semi rigid frame which allows the motor mounts to snap out if there is too much force on them).
I would stay away from banana type bullet connectors, and use instead collet style spliced contact bullets like XT150 6mm, Polymax 5.5, Polymax 4mm or similar ones with large contact surfaces.
I prefer to solder all power connections (except LiPo batteries ones) so that there is always a perfect contact regardless vibrations, oxydation or mechanical miss adjustment of connectors.
OK, Thanks for these comments. It seems to be generally agreed that bullet connectors are OK as long as they are high current/good quality ones, but some people still prefer to solder everything except the battery connectors to be sure. The bullets that come with the stock motors are not up to the job and shouild be cut off and replaced by better ones or the wires soldered directly (once you have established which order to connect the wires to the ESCs.)
What about the ESC connection to the PDB - solder or Deans? I have no experience of Deans and have soldered all my wires.
Do we not think the manual should be updated to reflect the above? Currently a new user would follow the manual and use the stock bullets on the motors.
Excellent, Thanks Chris, good work.
Stumbled to this thread while researching the mystery that is bullet connectors. Sorry to bump an old thread, but these days the manual recommends to get rid of them. Few questions come to mind:
- Why is the kit shipped with connectors that aren't (?) sufficient for the job?
- Could I just use e.g. Deans connectors instead?
- It feels more or less pointless soldering the bullet connectors (which are already more work to solder than others), shrink wrapping them and then just a bit later snip-snip off they go
Ok, the last bit wasn't a question, but you get the point :)
When I started with electric flight I read a recommendation, I think it was from the renowned German ESC manufacturer Schulze, one should avoid overheating the 'fins' of the male connector part when soldering as they loose their elasticity causing bad contacts. I do this by inserting the male contact to be soldered into a spare female part that is clamped in a bench vice. I use bullet connectors for years and have never experience any problems with the ones I soldered myself following this method. But when one buys motors with the connectors ready soldered one never knows how these were treated.