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Rekitus Maximus
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Re: Howard Littman Model Aircraft Web Site Open
Reply #8 - May 19th, 2021 at 10:04am
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Kittyfritters wrote on May 18th, 2021 at 10:35pm:
Rekitus Maximus wrote on May 18th, 2021 at 6:05pm:
... my avenger flew many times before I found the CG.

victor


I usually label it "Approximate CG" because the design position in a model is a starting point.  Since it varies by wood and builder you always find the actual CG by flying it.

KF


I think I forgot to state the reason...
your customers are likely to know how to balance a plane.
As such, not knowing the CG will not stop the test flights.

cheers
victor


  

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Kittyfritters
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Re: Howard Littman Model Aircraft Web Site Open
Reply #7 - May 18th, 2021 at 10:35pm
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Rekitus Maximus wrote on May 18th, 2021 at 6:05pm:
... my avenger flew many times before I found the CG.

victor


I usually label it "Approximate CG" because the design position in a model is a starting point.  Since it varies by wood and builder you always find the actual CG by flying it.

KF
  

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Re: Howard Littman Model Aircraft Web Site Open
Reply #6 - May 18th, 2021 at 6:05pm
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Hi Kittyfritters,

I have one possible reason for no one asking you about CG.

I always check for that detail on the plans.
Or in the step by step if that is in the kit.


I balance the plane at instructions/plans
after a few flights I determine what I think is the CG...
very few planes have them in the same place.

what I have not been able to bring into my building and flying
is a consistency of result.
guillows kits are mostly needing noseweight
R/C planes are more variable.

so I think most guys add noseweight to get 10 - 20 percent
from leading edge and try flying the aircraft.

gotta add that it never crossed my mind to ask
the makers of a kit for that data item.
I have always assumed it was there and that I could not find it.
... my avenger flew many times before I found the CG.

victor
  

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Kittyfritters
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Re: Howard Littman Model Aircraft Kit Errata
Reply #5 - May 18th, 2021 at 5:37pm
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One of my customers, Dan Snow, built three of my kits in the last month and informed me that he was having trouble trimming them because I had left the CG position off the plans and he didn't have a starting balance point. I checked the plans and discovered that I had left the CG location off the plans on five of my kits. This surprised me because, literally, a hundred of these kits have been built and no one told me about it! At the Round Valley contest I saw Bostillations and an Irish Jumping Bean flying very well and no one told me about the initial trimming problems.

I have reviewed and revised the plans where necessary and am having them reprinted for future production. If you have any of the following kits and have not built them yet here are the balance points:

Bostillation a bit less than and inch aft of the spar. This is noted on the plan in an unconventional location, the upper right corner of the plan off the wing tip. The marker has been moved to a more conventional location under the side view of the fuselage on the plan.

Irish Jumping Bean about an inch aft of the spar. Plan revised.

Wright Amount of Wrong just aft of the leading edge of the lower wing. Plan revised.

Double Trouble at the spar on the upper wing. Plan revised.

Bristol Beaufighter about 1/3 back from the leading edge of the wing. Plan revised.

I am grateful to Dan for telling me about this and my apologies if this has caused you any trouble with these models.

Keep 'Em Flying!

Howard

  

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Re: Howard Littman Model Aircraft Web Site Open
Reply #4 - Jun 30th, 2018 at 7:56am
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Howard,
You've certainly come a long ways and have been doing this very actively far more than I had anticipated.  From the looks of things, you've done a fantastic job.  Congratulations.  Are there any future models you've got in mind?  I'm only asking because I may have the photos of whatever aircraft you wish to develop into kit form, and I also have hundreds of drawings of various aircraft from well-known artists such as: Peter Westburg, Wylam, Paul Matt, Joseph Nieto, and more that might be of some help. 
Gary (Skye0
  
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Kittyfritters
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Re: Howard Littman Model Aircraft Web Site Open
Reply #3 - Dec 18th, 2015 at 9:56pm
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Although we have had the "warmest year on record", indoor and building season is upon us.  At the urging of several modelers, I have developed a new product, "Just Plane Ribs!". 

It's a 12" X 3" laser cut sheet of ribs suitable for Bostonian, Embryo, or just plain building for fun.  The airfoil is one I developed for Bostonians, at the request of Dave Gee, and is the one I will be using in the production Irish Jumping Bean kit.  The chord is 3 inches when you use a 1/16" square leading edge and a 1/16" X 1/8" trailing edge.  It also has a 1/16" spar.  There are 20 ribs with lightening holes and four solid "tip ribs" on each 1/16" balsa sheet.

Just Plane Ribs will be available on my web site, next week, on the Specials page for $8 a sheet plus shipping.
  

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Re: Howard Littman Model Aircraft Web Site Open
Reply #2 - Nov 27th, 2013 at 12:17pm
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Kittyfritters,

Thanks for your efforts in keeping the free flight hobby going with these great kits.  Good luck on your venture.  These are some great models and something not everyone will have at the field or indoor site!

Thanks again KF,

Tom
  

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Your attitude will determine your altitude!- John Maxwell
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Re: Howard Littman Model Aircraft Web Site Open
Reply #1 - Nov 26th, 2013 at 1:56am
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Thanks for sharing that with us.  Might have to try a multi in the future. Looks interesting.
  

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Howard Littman Model Aircraft Web Site Open
Nov 6th, 2013 at 7:25pm
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The Howard Littman Model Aircraft web site hjlmodels.com, featuring kits of some aircraft not so often modeled, is open.  Orders will be accepted starting Friday, November 8th. 

The F7U Cutlass No-Cal kit and the F2A Brewster Buffalo kits are available.  The Cutlass is available in Blue or White Esaki tissue with printed tissue insignia.  The Buffalo is available in 5 different pre-printed Esaki tissue "skins".

The 1:16 scale kits, starting with the P-6E will be available before January as will the first of my No-Cal-Multi models, the Fokker F.36.

In the coming year the Hawker Fury I, the F11C-2, and the Heinkel 51 will be released in the 1:16 scale line.  The C-130, Short Sterling, and Handley-Page Hampdon will be released in the No-Cal-Multi line.

Please enjoy!

Howard
  

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