Foam Honey-Coming Weight savings

[Ron Van Putte]

On Jul 27, 2005, at 4:46 PM, Wayne Galligan wrote:

>  My last set of wings I cored out around the fat part of the wing 
> between leading edge and wing tube and behind the wing tube and saved 
> .5 oz per core.   Some of the guys that honeycomb the whole wing are 
> saving about 1 to 1.25 oz per panel.  But they  generally glass the 
> wing and paint it too.   I hollow out the wing tips then cap them with 
> 1/8 lt balsa wood and lighten the root rib also.  Overall this way I 
> save about 1.25 per wing panel from the regular way.  

I wonder how much adhesive weight is also saved, because the skin 
adheres to less foam.  I guess it depends on whether you put the 
adhesive on the foam or the skin.

Ron Van Putte

>> ----- Original Message -----
>> From: Atwood, Mark
>> To: discussion at nsrca.org
>> Sent: Wednesday, July 27, 2005 3:47 PM
>> Subject: RE: Foam Honey-Coming Weight savings
>>
>> Well…I can’t speak for the current wing plan forms, but we did a 
>> bunch of tests on the older Arch Nemesis wings and at the time…it was 
>> a waste of time.  Granted…we weren’t quite as close to the weight 
>> limit then… but all in all we saved on average less than 1oz per 
>> panel in the finished product…about 1.75oz TOTAL in the plane.   Not 
>> bad if it was quicker to do, but at the time it was a lot of work for 
>> very little gain.
>>  
>> Now that we’re scraping for every oz though…it might be worth 
>> re-evaluating.
>>  
>> -M
>>  
>>
>> From: discussion-request at nsrca.org 
>> [mailto:discussion-request at nsrca.org] On Behalf Of 
>> Jim_Woodward at beaerospace.com
>> Sent: Wednesday, July 27, 2005 4:47 PM
>> To: discussion at nsrca.org
>> Subject: Foam Honey-Coming Weight savings
>>  
>>
>>
>> Hi Guys,
>>
>> Does anyone happen to have some experience in weight reductions from 
>> foam honey-combing?  Wing cores, stab cores, vertical fin and rudder 
>> cores?  Maybe a 25% weight reduction?
>>
>> Thanks,
>> Jim W. 
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