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  #21  
Old 03-31-2016, 11:05 AM
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rotoiti rotoiti is offline
 
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Following the advice in this thread, I ordered Bansbach struts (530N version). They work beautifully.

I wrote a little article (with pictures) on the replacement process:
https://miro.pub/index.php/flying/new-door-struts
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  #22  
Old 04-17-2016, 05:11 PM
kkmarshall kkmarshall is offline
 
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Location: Central Tx
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Talking Which strut force?

So what is the consensus on the force needed for the Bansbach door struts,530n or 600n? I do have fully upholstered doors.

Thanks,
Keith
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  #23  
Old 04-18-2016, 04:21 AM
kkmarshall kkmarshall is offline
 
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Default Door struts

Bump to this topic
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  #24  
Old 04-18-2016, 09:59 AM
rocketman1988 rocketman1988 is offline
 
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Location: Sunman, IN
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Default struts

With a fully upholstered door, I would imagine the 600's would be the ticket. I do not have the interior in yet and the 600's are a little strong for the bare door, however, it is probably better to have a little too much than not enough...
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  #25  
Old 04-18-2016, 11:51 AM
kkmarshall kkmarshall is offline
 
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Thanks for the info. Is the "too strong"
Problem with 600's for you that they are hard to pull down
Or open too hard/abruptly?
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  #26  
Old 04-18-2016, 05:03 PM
rocketman1988 rocketman1988 is offline
 
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Default Struts

Definitely not too hard to pull down but with a bare door I don't think I would just unlatch them and let them go...either way, make sure you get the correct ends. If you are using the after market billet strut brackets, the brackets are 3/8" which is too small to accept the 10 mm thick ends. Unless you want to machine them about 1 mm, get the 5 mm thick ends...E2M8 I think was the number.
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Aerospace Engineer '88

RV-10
Structure - 90% Done
Cabin Top - Aaarrghhh...
Doors - Done
On Gear
290 HP Barrett Hung

Dues Paid 2016,...Thanks DR+
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  #27  
Old 04-18-2016, 05:54 PM
kkmarshall kkmarshall is offline
 
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Thanks so much for the input.
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  #28  
Old 06-08-2016, 10:14 AM
vic syracuse vic syracuse is offline
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These guys have a website now: store.easylift.com. Pretty easy to figure out.

Vic
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  #29  
Old 11-03-2016, 05:40 PM
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Bill.Peyton Bill.Peyton is offline
 
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So I ordered a couple of the Bansbach struts based upon the part numbers called out in this thread. Specifically BONOF50-100-247/530N, with the A1 and M8 Hinge eyes.

If you use A1 Hinge eyes on both ends (20mm length for each) the total length will be 247+40 = 287 or 11.3" and the minimum compressed length is 7.37", the total travel is 3.93"

The Vans provided strut minimum measurement from the plans is 7.875", or 200MM and the extended length (measured) is 11.8" or 300MM. So an exact replacement strut would be 7.875" to 11.8", with a travel of 3.95".

While the strut works just fine, it is .5 inches shorter than the Vans provided struts. So the issue is the door will not open fully with these struts. Due top the leveraged position the strut is mounted to the door, this leaves the door considerably closed compared to the correct length strut. My plan is to machine a new lower end piece to extend the Bansbach strut to the correct 7.875".

As an aside issue, to achieve the auto-dampening at full open, the Bansbach product must be mounted with the large body attached to the door bracket. If you used the Vans strut to determine the spacing of the bracket on your door, you will have an interference with the body of the Bansbach strut, which is a larger diameter body than the Vans strut. This requires some slight modification to the bracket. My door is painted on both the inside and outside and has the Planearound center latch. The 530N strut will raise the door without any assistance, and dampens the final inch of travel.
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Last edited by Bill.Peyton : 11-04-2016 at 07:22 AM. Reason: Corrected length with end eyes attached
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  #30  
Old 11-06-2016, 07:01 AM
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Bill.Peyton Bill.Peyton is offline
 
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As a follow up I spoke with the folks at Bansbach about a longer threaded eye, They stock a 25mm B1 M8, verses 20mm for the A1M8 eye. So I ordered the B1 M8 eye.

The B1 M8 hinge eyes add 25mm, so the total length will be 247+25+25=297mm or 11.7" The travel remains at 3.93. This essentially results in the same total length as the Vans strut, and almost the same travel. The only issue is the thickness of the B1 eye is .472" verses the .393" for the A1. This should easily work with the Vans bracket, but will have to be filed thinner to work with the plane around bracket.

I did confirm that for the auto-dampening to function, the strut must be mounted with the cylinder side up. (Attached to the door)

Here is the part number I ended up with:

BONOF50-100-247/530N Strut
B1 M8 Eye

The total cost for 2 with shipping was $75

As a second follow-up. I received the B1M8 eye. What is not called out in the part description is that the base of the eye is the same diameter as the strut base. Way too large to fit into the existing brackets. 30 minutes later, 4 parts were modified by removing the unnecessary material with a belt sander. The length is perfect and the eyes can be reused should a replacement strut be required in the future.
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Last edited by Bill.Peyton : 11-11-2016 at 02:21 PM. Reason: Follow up on received part
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