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Apr 19, 2011, 11:20 PM
Half a Huck
valleypatroll's Avatar
Discussion

Sapac MB-1 Motor and fan combo mounting


How do you guys mount the fan in a foamie? Do you just epoxy it in? Also it has no lip on it, do i need to fabricate one or just roll with it?
Thanks
Jimmy
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Apr 20, 2011, 05:31 AM
Aka: Tom Jenkins
ApexAero's Avatar
Most foamys have a cover that screws down to clamp the housing. If you use glue you'll have a hard time removing the fan when the motor burns up.
For a foamy fan try tub and tile silicone, not a lot just enough. I do dots and stuff the housing in to squeeze it. A gentile constant tug gets it out. Silicone also help with blocking noise transfer.
Apr 20, 2011, 03:18 PM
Half a Huck
valleypatroll's Avatar
Thanks
Apr 22, 2011, 05:20 AM
Registered User
I used hot glue on my T-50's. Only on one side. If I need to take it out I use lighter fluid to break the hot glue loose. I takes about 5 to 10 minutes to break the bond enought to pull it out.

As fas as no ring I guess it depends on the jet & what's molded into the foam. The MB-1 mounts just perfect in the T-50.
Last edited by ColoradoHeliNut; Apr 23, 2011 at 09:32 AM.
Apr 22, 2011, 12:10 PM
Registered User
restlessswind's Avatar
Quote:
Originally Posted by valleypatroll
How do you guys mount the fan in a foamie? Do you just epoxy it in? Also it has no lip on it, do i need to fabricate one or just roll with it?
Thanks
Jimmy
Interesting, my MB-1 was received with 4 lips in an "X" pattern. I just cut slits into the foam where the lips met foam. I also cut off the front intake ring so I was able to mount it without digging the foam out to make room for the ring.
Apr 22, 2011, 12:22 PM
Registered User
smkn951's Avatar
what about double sided tape?
Apr 22, 2011, 12:36 PM
Half a Huck
valleypatroll's Avatar
That's an idea
Apr 22, 2011, 12:37 PM
Half a Huck
valleypatroll's Avatar
Dumb question but which side is the exhaust side
Apr 22, 2011, 01:12 PM
Suspended Account
Quote:
Originally Posted by valleypatroll
Dumb question but which side is the exhaust side
That would be the part where the air comes out and you typically want it pointing towards the rear of the plane.
Apr 22, 2011, 01:25 PM
efflux RC's Avatar
Usually I will epoxy hardwood or plywood rails to the airframe. This makes the fan easily removable. If the fan does not have mtg tabs, make some.

Other times (as in the last pic) I will attach the fan with RTV silicone adhesive at three points. removal is easy with one slice with a knive at the joints.
This method is supporting a fan with 6.5lbs thrust.

Hope that helps.
Latest blog entry: Updated blog May 2017
Apr 22, 2011, 02:27 PM
Half a Huck
valleypatroll's Avatar
Thanks. But is it the motor side 4 the exhaust
Apr 22, 2011, 02:38 PM
efflux RC's Avatar
Quote:
Originally Posted by valleypatroll
Thanks. But is it the motor side 4 the exhaust
In a SAPAC fan, yes.
Latest blog entry: Updated blog May 2017
Apr 22, 2011, 03:01 PM
Half a Huck
valleypatroll's Avatar
Thank you I appreciate it
Apr 22, 2011, 06:38 PM
Half a Huck
valleypatroll's Avatar
What is the recomened timing for 5 s
Apr 22, 2011, 11:32 PM
Jets & Lasagna...champion diet
T-CAT's Avatar
I would highly recommend low timing (mid timing at the most). With low timing, the motor will stay much cooler and draw less amps. The increase in timing won't be worth the extra heat, amp draw, and power production. Also, the Hobbywing (and every vendor that carries Hobbywing ESC's under a different name such as Turnigy Plush) ESC's tend to stutter on 5S with low timing (so high timing must be used on 5S, but that causes high amp draw and heat). However, on 4S, all timing settings seem to work fine for me.

When going 5S with this motor, low timing seems to work fine on Castle ESC's.


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