Matronics Email Lists :: View topic - CH600 brake lines & Cont A65 prop

Matronics Email Lists
Web Forum Interface to the Matronics Email Lists

Get Email Distribution Too! FAQ Search Memberlist Usergroups Register

Profile Log in to check your private messages Log in

CH600 brake lines & Cont A65 prop

Matronics Email Lists Forum Index -> Zenith-List

View previous topic :: View next topic

Author Message

marinegunner(at)gmail.com
Guest

Posted: Tue Jun 13, 2006 5:41 pm Post subject: CH600 brake lines & Cont A65 prop

I have a CH 600 that will be ready for the DAR withing 6-8 weeks. I have a Cont. A65 on the airplane. Would like to move the empty CG forward just a tiny bit. Right now, with two 200 +/- people and low fuel (4 gallons or so), the CG is at or behind the aft CG. I figure that a metal prop would do the trick. I have a wooden prop now. Battery is already as far forward as I can get it. Nothing else that I add will make much difference. For example, small panel mounted radio will hardly move the empty CG.  Anyone know someone with a metal prop for a Cont. A-65? 

  

 Brake lines are done in plastic. I really do not like the plastic showing outside the wheel pants. Thinking of making the last foot or two out of metal tubing. Any ideas? Successful applications would be nice.

   

 Thanks for your help.

-- 

Semper Fi,

Steven R. Hulland

CH 600, Amado, AZ



This and all other incoming/outgoing email, attachments and replies scanned prior to opening/sending and uses an external firewall to help insure virus free email and attachments.

- The Matronics Zenith-List Email Forum -

Use the List Feature Navigator to browse the many List utilities available such as the Email Subscriptions page, Archive Search & Download, 7-Day Browse, Chat, FAQ, Photoshare, and much more:

http://www.matronics.com/Navigator?Zenith-List

daveaustin2(at)can.rogers
Guest

Posted: Wed Jun 14, 2006 3:00 am Post subject: CH600 brake lines & Cont A65 prop

Steve,    

 Put a helium balloon in the tail..

 Do not archive

 Dave Austin  601HDS - 912, Spitfire Mk  VIII

- The Matronics Zenith-List Email Forum -

Use the List Feature Navigator to browse the many List utilities available such as the Email Subscriptions page, Archive Search & Download, 7-Day Browse, Chat, FAQ, Photoshare, and much more:

http://www.matronics.com/Navigator?Zenith-List

marinegunner(at)gmail.com
Guest

Posted: Wed Jun 14, 2006 4:59 am Post subject: CH600 brake lines & Cont A65 prop

Dave,

 Helium ballon might do the trick! But, how about building in a ballon with an outside valve. Then I can add/delete as required.

  

 Do not Archive-- 

Semper Fi,

Steven R. Hulland

CH 701, Amado, AZ



This and all other incoming/outgoing email, attachments and replies scanned prior to opening/sending and uses an external firewall to help insure virus free email and attachments.

- The Matronics Zenith-List Email Forum -

Use the List Feature Navigator to browse the many List utilities available such as the Email Subscriptions page, Archive Search & Download, 7-Day Browse, Chat, FAQ, Photoshare, and much more:

http://www.matronics.com/Navigator?Zenith-List

planejim(at)bellsouth.net
Guest

Posted: Wed Jun 14, 2006 5:06 am Post subject: CH600 brake lines & Cont A65 prop

Steve,

  

 I have a 601HD that tends to run to the aft CG  limit with two 200 pounders in the seats and minimum fuel ( 3 Gal ). I have  only a 16 Gal main tank forward of the inst. panel. When I first started  construction I asked Chris H. where the CG would fall with the Rotax 912UL. He  said keep all the weight forward that I could during construction. I did but  still have to watch the aft limit. I still have plenty of elevator on landing at  the aft limit. It would have been nice if ZAC had made the engine about 1 1/2"  longer.

  

 As for your situation, you don't want to carry  dead weight around if you can avoid it, and I assume you don't want to lengthen  your engine mount and cowling so if you have nothing else of substantial weight  to move forward going to a metal prop may be your easiest answer. The other  temporary answer is add just enough lead ( that dreaded dead weight ) to the  engine mount until you can get a metal prop. Depends on your DAR ,but he/she may  require you to re-weigh the aircraft if you don't have all this solved before  he/she gets there. I have a friend who had to add 64 pounds of lead to a  forward bulkhead of his Loehle 5151 to get the CG in limits. This much dead  weight on an airplane that only weighs 500+ pounds! This was just a poor design  thing because many 5151 builders have added much dead weight. If the metal prop  doesn't do the complete job you may still have to add a little lead forward.  Sorry I don't know anyone who has a metal prop for the 65HP Cont. Good luck on  this one.

  

 As for plastic brake lines, I have 515 hours, 9  1/2 years on my plastic lines with no problems. Only connections are at brake  cyl. at the wheels and the rudder pedals. No connections, no leaks. KISS! I do  have a piece of rubber hose on outside of plastic line where they go into the  wheel fairings to prevent chaffing. Works fine. Up under the wing no one sees  the brake lines anyway!

  

 Have a safe first flight.

  

 Jim Hoak 601HD - 515 hrs

 [quote]   ---

- The Matronics Zenith-List Email Forum -

Use the List Feature Navigator to browse the many List utilities available such as the Email Subscriptions page, Archive Search & Download, 7-Day Browse, Chat, FAQ, Photoshare, and much more:

http://www.matronics.com/Navigator?Zenith-List

marinegunner(at)gmail.com
Guest

Posted: Wed Jun 14, 2006 1:58 pm Post subject: CH600 brake lines & Cont A65 prop

Jim Hoak,

 Thanks for the nice answer. My 600 has a Gross Weight of 1,200lb. Empty weight of 605. When empty the Aft CG is 23.37% of MAC. All calculations assume crew weight of 215 per person, 48 lb. baggage, 6lb fuel when empty, 96lb fuel when full. With one person and empty fuel Aft CG is  30.99% of MAC; Full fuel  with one person CG is 26.29% of MAC; Full fuel & two people, Aft CG is 29.22% of MAC; Two people and no fuel, Aft CG is 29.22% of MAC.

  

 Using 30% of MAC as the maximum acceptable AFT CG, One person with the airplane empty shows the airplane out of CG aft. Not a problem because I should never get empty while flying and the absolute max CG aft is 31.5%  of MAC. The situation with two people and being very low on fuel is the one I would like to move forward a bit - hence a metal prop might do the trick. I estimate that a metal prop weighing 12 pounds more than the existing wooden one will put the empty CG somewhere near 21% of MAC - well within the min. acceptable of 18% of MAC. Once I know the weight of a metal prop, I can see if this might work - although it can easily move the Aft CG to a bit less than 18% of MAC. If it does, then that solution will not work.  

  

 One thing that is nice is my Excel Spreadsheet for the CG. I can plug in numbers anywhere and find out what happens to the CG. For example, if I add a small panel radio, it will change CG and I can figure out by how much. 

  

 As with your friend, I could add a bit of lead to the engine frame. I doubt if it would need more than a few pounds and might be the best solution. 

  

 I really like your idea concerning rubber or some other material over the brake lines where they come through the wheel pants to prevent chafing. I may simply do someting like that and as you say, KISS.

  

 Anyway, gonna get this stuff done along with a few other minor items and should be ready for DAR in August. That is the goal.

  

 Thanks for your input, it was helpful.

-- 

Semper Fi,

Steven R. Hulland

CH 600, Amado, AZ



This and all other incoming/outgoing email, attachments and replies scanned prior to opening/sending and uses an external firewall to help insure virus free email and attachments.

- The Matronics Zenith-List Email Forum -

Use the List Feature Navigator to browse the many List utilities available such as the Email Subscriptions page, Archive Search & Download, 7-Day Browse, Chat, FAQ, Photoshare, and much more:

http://www.matronics.com/Navigator?Zenith-List

noelloveys(at)yahoo.ca
Guest

Posted: Wed Jun 14, 2006 2:58 pm Post subject: CH600 brake lines & Cont A65 prop

Increasing the mass of the prop  by 12 Lb. is going to increase the gyroscopic forces on the end of the crank  quite a bit.  It may also have a considerable effect on how the plane  handles in turns, climbs and descents.  I think your idea of weighting the  engine  mount is the better idea.  

  

 One more answer may be to have  a spacer/weight installed over the hub of the prop  At a distance of a  couple of inches from the centre of rotation the gyroscopic forces won't be too  large and the weight will actually be in front of the prop.  Of course the  weight will have to be dynamically balanced

  

  

 

Noel [quote]   

   --

- The Matronics Zenith-List Email Forum -

Use the List Feature Navigator to browse the many List utilities available such as the Email Subscriptions page, Archive Search & Download, 7-Day Browse, Chat, FAQ, Photoshare, and much more:

http://www.matronics.com/Navigator?Zenith-List

Display posts from previous:

	Matronics Email Lists Forum Index -> Zenith-List	All times are GMT - 8 Hours
Page 1 of 1

Jump to:

You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot vote in polls in this forum
You cannot attach files in this forum
You can download files in this forum