WhoDaMan

My Feedback: (164)

Hi Mike:
Have you heard anything from a release date from Mibo

Thanks, Dave

mselby

My Feedback: (1)

Hi Dave,
Its a bit behind schedule which is my fault. The molds are here, and the primary layups would be done here. I have been finishing up an A-6E which I am hoping to have ready for Top Gun, so there was a bit of a sprint to complete the molds and engineering on that. My other concern is to try and do a re-work on the central block for the main gear, the current one requires a 5 axis mill to make and is not practical for serial production. I am guessing it will release from Mibo around June.
Regards
Mike

DanSavage

My Feedback: (5)

Hi Mike,

Congratulations on the successful development of a very difficult subject. It's a beautiful model.

I'm currently working on my own design of an FB-111 in 1:10 scale. I've also designed a functional, albeit sport-scale, main landing gear for it.

Here's a youtube video of the engineering mock-up I made to develop it. http://www.youtube.com/watch?v=9yj_WXpQQDE

Mine is using air-control. I'm curious about why you changed your MLG from air to electric?

Also, did you have any trim changes with wing sweep?

Thanks,

Dan

mselby

My Feedback: (1)

Hi Dan,
There were trim changes with the wings swept, but they were not large. I switched to electric both because I felt it is more reliable, I was able to achieve a more scale speed, and I preferred the door position setup on the sequencer with servos.
Good luck with your project, your gear video looks nice.

DanSavage

My Feedback: (5)

Mike,

That's good to know about the trim changes.

I can definitely see the advantages to electric for fine-tuning speed and especially for sequencing the doors to the gear.

Thanks again,

Dan

jonastecknare

I have used an 3,6V electric screwdriver as power for my landing gears! I have also made servos with RC car gears and a mabuchi540 motor.
Microswithes cotrol the end points. Easy really, a fuse might be agood idea if there is trouble and it gets stuck midways.
Jonas

DanSavage

My Feedback: (5)

Thanks for posting that info, Jonas. I can see it's a pretty simple affair that would have a high degree of reliability.

Dan

jonastecknare

Yeah! If you set it up properly it works brilliantly, if you are sloppy its hell on earth to get working. Think it thru beforehand!
Dont ask how i know this........
Jonas

mselby

My Feedback: (1)

Hi Jonas, the screw driver is an interesting choice. What is the weight and torque like?

DanSavage

My Feedback: (5)

I did a quick search and found a good candidate. I think I'll buy one and play around with it.

Jonas, how did you attach the jackscrew (running thread) to the driver bit?

Dan

===

3.6V Cordless Rechargeable Screwdriver
MODEL # 9074CTN A
$20.00 @ Black & Decker
40 in-lbs (640 oz-in.)
180 rpm
http://www.blackanddecker.com/power-...74CTN%20A.aspx

jonastecknare

When i bought my electric screwdriver there was drills with a driverbit attached to it. With some heat i managed to pull the drill from the "bit".
Then i just drilled the bit and cut a thread in it. the threaded rod is just screwed into the bit and locked with a nut!
The problem with these " servos isnt power its the speed, it might take 10 15 seconds to tuck in your gear.
The power is so good it might break things if you dont watch out. I have used a normal 4,8V battery to get a little better speed.
I havent actually checked the weight since i had the unit in the nose for balance an had to ad quite alot of ballast in the nose.( bad engine placement) Hope this is useful! picture of servo with car gears. This had alot less power. Strong nevertheless! sorry about the poor picture quality.
Jonas

DanSavage

My Feedback: (5)

Thanks for the info.

I ended up buying a cheapo electric screwdriver to play with and you're right. The slow rpm does take a long time.

It's also going to end up being pretty heavy for my landing gear. Without batteries, it weighs about 6-1/2 oz.

It might work pretty good for my wing-swing mechanism, but I would have to go to a real acme thread to get the wings to move at the proper speed.

Thanks again,

Dan

jonastecknare

You are most welcome! F111 is such a cool project. I would be at it too if i didnt already had far to many things going on.
Good luck!
Jonas