601 HDS Move radiator rearward or fit front undercarriage stop?

I am finishing a 601HDS that is fitted with a Subaru ea81 motor. The water cooling radiatior is fitted under the fuselage, close behind the front undercarriage. As there is no stop on the front undercarriage, it is possible for the wheel spat to impact with the underside of the radiator.

What is the best solution to this problem?

I have contemplated fitting a pair of steel cable stops to the front undercarriage to limit their travel and also to relocate the radiator further rearward so it is completely clear of the wheel spats. This will of course have an impact on the aircraft's weight and balance, moving the C of G rearward.

Any advice appreciated.

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Comment by Stephen R. Smith on March 28, 2009 at 8:32pm
I actually have a 601XL so I don't need one of these. I just happened to know about them. Others probably have better information then I do. Perhaps some kind of rubber ring could be fabricated to absorb some of the energy. I think Larry has an HDS.
Comment by Greg Wilson on March 28, 2009 at 8:27pm
You can see from the photo below the the radiator is mounted directly behind the front wheel on my aircraft. I think Larry has his much further back to clear the undercarriage spat and to allow space for the fiberglass scoop he's fitted.
Comment by Greg Wilson on March 28, 2009 at 8:25pm

Comment by Greg Wilson on March 28, 2009 at 8:04pm
Excellent! Thanks for the info. I will contact Larry about gettig one of these and the tow bar that goes with it.
The bottom undercarriage bracket that this ring will impact against is fairly light. How have you strengthened that to stop it buckling when the ring hits it?

Comment by Stephen R. Smith on March 28, 2009 at 7:55pm
Yes, Larry McFarland sells a travel-stop ring solution. Here is a picture from his website.

Comment by Bob McDonald on March 28, 2009 at 7:41pm

I have a CH601HD, the limit travel stop used on the nose gear is one I purchased from Larry MacFarland. It serves two purposes in that it limits the nose gear travel in the event of a bungee failure and is also the compact nose gear steering pull rod attachment fitting for ground handling and moving around the hangar. It is a simple 2 piece ring clamp that goes around the nose gear tube to serve this function. Go to www.macsmachine.com to see it.
Keep it simple principal applies, no need to relocate radiator and protects against prop strike if the bungee fails.


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