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1. 08:48 AM - Re: Can anybody confirm this? (Owen Baker)
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Subject: | Re: Can anybody confirm this? |
3/28/2017
Hello Mark, Thanks for your input. You wrote:
1) "Assuming your empty weight is a portly 903 lbs and you are at max
forward CG, you should have no more than 225 lbs on your nose gear."
My empty weight is 972 pounds with 242 pounds on the nose landing gear. The
empty weight CG is at 60.10 inches. The aircraft manual shows 61.50 inches
as the forward operating CG limit.
2) "In general you should have from 10% (max aft CG) to 25% (max forward CG)
on the nose gear."
At empty weight I have 24.9 percent of the aircrafts total empty weight of
972 pounds on the nose gear with the CG at 60.10 inches, i.4 inches forward
of the 61.50 operating CG limit.
3) "You really should move the main gear more forward." and "I would go with
about 71 inches."
I agree. How do you recommend that this should be accomplished?** I have
already used a flox wedge to move the main landing forward to 72.25 inches.
4) "I don't think most of these parts were upgraded with version 3.X."
I think that the Lyle #1 and #2 nose landing gear made for me were sturdy
enough. Lyle beefed up the aluminum linkages when he made #3 for me.
OC
*PS: I have given some casual consideration to having Grove make a custom
main landing gear for me that would move the axle locations forward, but
have not pursued it. See here:
http://www.groveaircraft.com/designguide.html
and here:
http://www.groveaircraft.com/layout.html
===============================
From: M Ketteing
Sent: Monday, March 27, 2017 5:07 PM
Subject: Re: KIS-List: Can anybody confirm this?
Hi OC,
In general you should have from 10% (max aft CG) to 25% (max forward CG) on
the nose gear.
Assuming your empty weight is a portly 903 lbs and you are at max forward
CG, you should have no more than 225 lbs on your nose gear. My guess is
even at full empty your CG is still not at the front limit. So you (like
most every TR-1) still have too much weight on the nose gear. You really
should move the main gear more forward. Based on 10% on the nose gear at
max gross and max aft CG the main should be about 70.5 inches. I would go
with about 71 inches. You really will like landing and taking off much more
with this main gear location. Plus the loads and stress on the nose gear
will be much less.
Also keep in mind that when I checked the nose gear in 1999 (version 2.1,
streamlined tube with added side plates) most everything did not meet FAR
part 23 requirements. This includes the arms, pins and bolts along with the
actual tube. I don't think most of these parts were upgraded with version
3.X.
Mark K.
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