Verhees Delta plan review

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Onex93

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Hello,

As I near the end of Onex project (only 90% to go :gig:) I've begun to look for my next project. I chose the Verhees Delta because of it's uniqueness and the fact that its a plans built all aluminum design.

Purchasing the plans was easy, an email to Bart Verhees and a wire transfer of 400 Euro and my plans were on their way from Belguim.

Upon receiving the plans I was pleasantly surprised by their quality. Many full-size templates and a comprehensive builders guide stood out to me. The best part of the whole design is that Bart included the cutting files for the aluminum and limited steel parts. This allows the build to begin with kit quality parts.

Onex93
 

skier

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Very cool. It seems like the two seater may meet LSA requirements. If so, I may have to jump on this one.

Stall speed: 85 km/hr (45.8 knots)
Cruise: 240 km/hr (130 knots)
Gross Weight: 600kg (1322 lbs)
 

addicted2climbing

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Hello,

As I near the end of Onex project (only 90% to go :gig:) I've begun to look for my next project. I chose the Verhees Delta because of it's uniqueness and the fact that its a plans built all aluminum design.

Purchasing the plans was easy, an email to Bart Verhees and a wire transfer of 400 Euro and my plans were on their way from Belguim.

Upon receiving the plans I was pleasantly surprised by their quality. Many full-size templates and a comprehensive builders guide stood out to me. The best part of the whole design is that Bart included the cutting files for the aluminum and limited steel parts. This allows the build to begin with kit quality parts.

Onex93
Did you buy the 2 seat version or are you building another single seater?

Marc
 

cluttonfred

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It's not quite what I am looking for, but it is undeniably cool.
 
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plncraze

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The two- seater is listed as a kit not plans like the single seater.
 

skier

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Do the plans for the two-seater show fixed- and retractable-gear options?
It sounds like the baseline is retractable gear and fixed gear would be a off-plan modification. I have sent Bart an email asking about whether it would meet the US LSA requirements and the two things he mentioned were that as designed it has retractable gear and a constant speed prop. Both are easy modifications and I would think it would be possible to do a nice fairing on the nose wheel to minimize the drag.

One of the most interesting things about this design is the useful load.The site lists empty weight as 275kg and gross as 600kg. That leaves a useful load of 325kg (716 lbs).

Maybe it's a blessing that my velomobile kit delayed the start of my CH-750 by a year. I'm pretty excited about this possibility. It's different. It's interesting. It can be LSA. I've always liked the Dyke Delta, Baker Delta Kitten, Facetmobile, and of course the single seat Verhees Delta. It pretty much checks all the boxes I was looking for. I'm just hoping it isn't out of my price-range.
 

plncraze

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The two- seater is listed as a kit not plans like the single seater.
 

skier

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The two- seater is listed as a kit not plans like the single seater.
It would be interesting to know what route they went with the plan set for the kit. Did they make the plans complete enough to fabricate of parts from like the Zenith line of aircraft, or is it more of an assembly manual like the Quickie kits were shipped with.
 

addicted2climbing

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I like this version much better as well, but it looks like it must be landed 2 point and curious how difficult it is to be consistent in that. On takeoff it did not seem to rise/rotate onto the nose gear either... Is this a normal take off and landing for a delta or is it that since I only see one sample that in reality it could be landed on the main gear and settle in and or rotate on takeoff?

Thoughts?
 

plncraze

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If the plans ever become available on their own please post it here!
 

cluttonfred

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There is a nice article by Bart Verhees about his Delta 2 in the latest (August 2018) issue of the UK LAA's magazine Light Aviation.
 

FritzW

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They have tremendous 'cool factor' but it looks like they have lousy visibility, especially during landing.
 

Himat

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I like this version much better as well, but it looks like it must be landed 2 point and curious how difficult it is to be consistent in that. On takeoff it did not seem to rise/rotate onto the nose gear either... Is this a normal take off and landing for a delta or is it that since I only see one sample that in reality it could be landed on the main gear and settle in and or rotate on takeoff?

Thoughts?
If the take-off and landing is normal for a delta?
Not exactly, but a function of how the landing gear is designed. A delta need to be rotated to a higher angle of attack than an orthodox airplane design. That do require a higher heavier undercarriage if not done like on the Verhees Delta. The design also makes take offs safer, the undercarriage makes it difficult to rotate to early. The chances of early rotation at a to low speed with a following mush and loss of control is difficult. The tail sit on the ground and the elevator can not rotate the airplane to a higher angle of attack. Lift of come at flying speed.

Landings better not be hot and on the nose wheel. Touching down tail first may make for a hard landing, but probably a safe failure.
 
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