X-Virus-Scanned: clean according to Sophos on Logan.com X-SpamCatcher-Score: 10 [X] Return-Path: Received: from an-out-0708.google.com ([209.85.132.246] verified) by logan.com (CommuniGate Pro SMTP 5.1.7) with ESMTP id 1905722 for flyrotary@lancaironline.net; Tue, 06 Mar 2007 17:37:16 -0500 Received-SPF: pass receiver=logan.com; client-ip=209.85.132.246; envelope-from=rotary.thjakits@gmail.com Received: by an-out-0708.google.com with SMTP id c34so1718464anc for ; Tue, 06 Mar 2007 14:36:28 -0800 (PST) DKIM-Signature: a=rsa-sha1; c=relaxed/relaxed; d=gmail.com; s=beta; h=domainkey-signature:received:received:message-id:date:from:to:subject:in-reply-to:mime-version:content-type:references; b=Cmc/TuzxWN+Id2+5KL/3gQePU6pulBrXCprnEkirAh73wFQNlbMFvqodEZVPweowTL8SQYMH8VeSNo/4LSMCkRW8MGFGkOcpv1TMLvIoK60I4NcTijbMEYci5m4VMV5msHi9DM9I2+u8yk4a7XRrE3+njhKRxcDJPUSyGVbbuFw= DomainKey-Signature: a=rsa-sha1; c=nofws; d=gmail.com; s=beta; h=received:message-id:date:from:to:subject:in-reply-to:mime-version:content-type:references; b=gyy0oNp3nTX5fQ7TrrMi1gMLr5wlLg56hv/Rfwx2VblJzd3FFnnYiWbm9C99s2LsiQqSGoX1/0ICB4+kHzf6/sUigqEZyjbsgt0z5b8Cu/O5EnSYBjVDszNfdpdjfZAZ2jdEI8jqa2O89e/7hSLM4/hVsAqYwLz7+oZCeVu/46w= Received: by 10.100.177.16 with SMTP id z16mr5800474ane.1173220588890; Tue, 06 Mar 2007 14:36:28 -0800 (PST) Received: by 10.100.195.12 with HTTP; Tue, 6 Mar 2007 14:36:28 -0800 (PST) Message-ID: <63163d560703061436l2f1ee50bg33a74a1397903756@mail.gmail.com> Date: Tue, 6 Mar 2007 17:36:28 -0500 From: "Thomas Jakits" To: "Rotary motors in aircraft" Subject: Re: [FlyRotary] Re: Engine choise for BD-4 (changed from "Hard Landing ") In-Reply-To: MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_Part_87690_388962.1173220588711" References: ------=_Part_87690_388962.1173220588711 Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Content-Disposition: inline Yeah! But recently you find cheap jounce-air-bumps. They might be worth looking into! If you grease it, they are transparent - you bounce they suck up the bump, no rebounce. Depends how much they weight. Also thought of airbags, one could inflate them according to load, even with a load-leveler, must be on even ground though. Valving on the airlines could be used for rebound-control. If you have a little airtank it will fill the bags after the first bump.... A lot of stuff just for the landing.... Idea is that it is never heavier than the original. How about welded steel landing gear ala Smyth Sidewider..... Thomas On 3/6/07, wrjjrs@aol.com wrote: > > Thomas, A second reply, I Grew up in the Campbell CA area and Moto-X Fox > started in that area. I knew Bob Fox well enough to be recognized when I > came in. He said to me 15 years ago that they (X Fox) were going into mostly > off-road trucks and snowmobiles because they coulld get more for the shocks. > Just one of the super long travel air shocks, could cost 10K in those days! > pretty expensive. > Bill Jepson > > > -----Original Message----- > From: rotary.thjakits@gmail.com > To: flyrotary@lancaironline.net > Sent: Tue, 6 Mar 2007 1:45 PM > Subject: [FlyRotary] Re: Engine choise for BD-4 (changed from "Hard > Landing ") > > I thought so.. > > The idea is to keep the speed, but make the BD-4 more rough field capable, > shock absorbing without too much rebound would be the ideal thing: > Like the air-bumps on Baja-Racers.... > > Thomas > > On 3/6/07, wrjjrs@aol.com wrote: > > > > Thomas, The biggest problem there is, "Does not or barely rebound". The > > different weights is also tough, but with carbon you could design strong > > enough for a 4 seater but it would be a bit stiff when unloaded. > > Bill Jepson > > > > > > -----Original Message----- > > From: rotary.thjakits@gmail.com > > To: flyrotary@lancaironline.net > > Sent: Tue, 6 Mar 2007 12:18 PM > > Subject: [FlyRotary] Re: Engine choise for BD-4 (changed from "Hard > > Landing ") > > > > I think in one of the old newsletters there was talk about fibreglass > > landing gear... > > Anyone out there with the know how to "tune" the gear to specific > > properties? > > I like Lynn's idea of using something "designed" like the Stinson gear > > (need to look that up, any links...?). > > Already thought about "Airbag"-suspension, a la Hornet > > (Challenger-derivative...) > > > > At the end the best designed gear does not need any adjusting.. > > Who has the expertise to make/design a glass/carbon gear, that: > > > > Absorbs shock > > does it progressively > > Does not or barely rebound > > Can accommodate different weights (4 seater) > > > > I understand one can play with different fibers, orientation, different > > resins, etc. > > But where to start?? :)) > > > > Thomas > > > > > > > > On 3/6/07, Bob White wrote: > > > > > > On Tue, 6 Mar 2007 11:24:35 EST > > > Lehanover@aol.com wrote: > > > > > > > > > > > > > > I don't remember the Whitman geared BD-4. I was thinking about a > > > Cessna main > > > > gear, but I found a complete assembly at Sun&Fun and I could not > > > pick it up. > > > > So, I forgot about it. > > > > > > > Lynn E. Hanover > > > >


**************************************
AOL now > > > offers free > > > > email to everyone. Find out more about what's free from AOL at > > > > http://www.aol.com. > > > > > > > I just tested the durability of the BD style gear made from 7075 > > > aluminum. After ripping them completely off the landing gear box, > > > they > > > are in perfect condition. > > > > > > Bob W. (Leaving to do more paperwork with the FAA.) > > > > > > -- > > > N93BD - Rotary Powered BD-4 - http://www.bob-white.com > > > First Flight: 11/23/2006 7:50AM - 3.8 Hours Total Time > > > Cables for your rotary installation - http://www.roblinphoto.com/shop/ > > > > > > -- > > > Homepage: http://www.flyrotary.com/ > > > Archive and UnSub: > > > http://mail.lancaironline.net:81/lists/flyrotary/List.html > > > > > > > ------------------------------ > > AOL now offers free email to everyone. Find out more about what's free > > from AOL at *AOL.com* > > . > > > > ------------------------------ > AOL now offers free email to everyone. Find out more about what's free > from AOL at *AOL.com* > . > ------=_Part_87690_388962.1173220588711 Content-Type: text/html; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit Content-Disposition: inline Yeah!
But recently you find cheap jounce-air-bumps.
They might be worth looking into!
If you grease it, they are transparent - you bounce they suck up the bump, no rebounce.
Depends how much they weight.
Also thought of airbags, one could inflate them according to load, even with a load-leveler, must be on even ground though. Valving on the airlines could be used for rebound-control.
If you have a little airtank it will fill the bags after the first bump....
A lot of  stuff just for the landing....
Idea is that it is never heavier than the original.

How about welded steel landing gear ala Smyth Sidewider.....

Thomas


On 3/6/07, wrjjrs@aol.com <wrjjrs@aol.com> wrote:
Thomas, A second reply, I Grew up in the Campbell CA area and Moto-X Fox started in that area. I knew Bob Fox well enough to be recognized when I came in. He said to me 15 years ago that they (X Fox) were going into mostly off-road trucks and snowmobiles because they coulld get more for the shocks. Just one of the super long travel air shocks, could cost 10K in those days! pretty expensive.
Bill Jepson
 
 
-----Original Message-----
From: rotary.thjakits@gmail.com
To: flyrotary@lancaironline.net
Sent: Tue, 6 Mar 2007 1:45 PM
Subject: [FlyRotary] Re: Engine choise for BD-4 (changed from "Hard Landing ")

I thought so..

The idea is to keep the speed, but make the BD-4 more rough field capable, shock absorbing without too much rebound would be the ideal thing:
Like the air-bumps on Baja-Racers....

Thomas

On 3/6/07, wrjjrs@aol.com < wrjjrs@aol.com> wrote:
Thomas, The biggest problem there is, "Does not or barely rebound". The different weights is also tough, but with carbon you could design strong enough for a 4 seater but it would be a bit stiff when unloaded.
Bill Jepson
 
 
-----Original Message-----
From: rotary.thjakits@gmail.com
To: flyrotary@lancaironline.net
Sent: Tue, 6 Mar 2007 12:18 PM
Subject: [FlyRotary] Re: Engine choise for BD-4 (changed from "Hard Landing ")
I think in one of the old newsletters there was talk about fibreglass landing gear...
Anyone out there with the know how  to "tune" the gear to specific properties?
I like Lynn's idea of using something "designed" like the Stinson gear (need to look that up, any links...?).
Already thought about  "Airbag"-suspension, a la Hornet (Challenger-derivative...)

At the end the best designed gear does not need any adjusting..
Who has the expertise to make/design a glass/carbon gear, that:

Absorbs shock
does it progressively
Does not or barely rebound
Can accommodate different weights (4 seater)

I understand one can play with different fibers, orientation, different resins, etc.
But where to start?? :))

Thomas
On 3/6/07, Bob White <rlwhite@comcast.net > wrote:
On Tue, 6 Mar 2007 11:24:35 EST
Lehanover@aol.com wrote:

<snip>
>
> I don't remember the Whitman geared BD-4. I was thinking about a Cessna  main
> gear, but I found a complete assembly at Sun&Fun and I could not pick  it up.
> So, I forgot about it.
<snip>
> Lynn E. Hanover
> <BR><BR><BR>**************************************<BR> AOL now offers free
> email to everyone.  Find out more about what's free from AOL at
> http://www.aol.com.
>
I just tested the durability of the BD style gear made from 7075
aluminum.  After ripping them completely off the landing gear box, they
are in perfect condition.

Bob W.  (Leaving to do more paperwork with the FAA.)

--
N93BD - Rotary Powered BD-4 - http://www.bob-white.com
First Flight:  11/23/2006 7:50AM - 3.8 Hours Total Time
Cables for your rotary installation - http://www.roblinphoto.com/shop/

--
Homepage:  http://www.flyrotary.com/
Archive and UnSub:   http://mail.lancaironline.net:81/lists/flyrotary/List.html

AOL now offers free email to everyone. Find out more about what's free from AOL at AOL.com.

AOL now offers free email to everyone. Find out more about what's free from AOL at AOL.com.

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